Abstract
Mechanic studies realized on the two dimensional beams structures with swivel joints show that in statics, the vertical displacement is
continuous, but the rotation is discontinuous at the node where there is a swivel joint. Moreover, in dynamics, many authors do not
usually take into account the friction effect, modeling of these structures. We propose in this paper, a modeling of the beams structures
with swivel joints which integrates viscosity effects in dynamics. Hence this work we will present the formulation of motion equations
of such structures and the modal analysis method which is used to solve these equations.
Keywords: Beams, Swivel joint, Viscosity, Vibration, Modal Method.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Nonlinear Viscoelastic Analysis of Laminated Composite Plates – A Multi Scale...rtme
Laminated composite plates are widely used in modern structures. Resins of composites are almost made of
polymers which show time dependent and and in some cases stress dependent behaviour. In this paper, a
laminated composite plate is analysed using a multiscale method. At first, material properties of a lamina is
obtained using an analytical micromechanical approach called simplified unit cell method (SUCM) and
then in macromechanical level, Generalized Differential Quadrature Method (GDQM) is used to analyse
laminated composite plate. Schapery's integral is used to model nonlinear viscoelastic behaviour of the
matrix. Prony series is considered to define the compliance of matrix. Micromechanical process includes
obtaining overall properties of the composite by SUCM. Both geometrical and material nonlinearity are
taken into account in order to multiscale analysis of laminated composite plate.
Application of Numerical and Experimental Simulations for the Vibrating Syste...IJERD Editor
In this work,there may be some requirements of finding out the coupling loss factors of system component.It becomes difficult to exactly know the coupling loss factor by looking at the behavior of the system. For this purpose, the numerical solution developed in this work. Initially, one need to extract the displacement, velocity and energy profiles of the system which has got the components installed for which the coupling loss factor need to be determined. Then the numerical simulations can be run for different coupling loss factor of the vibrating system and the coupling loss factor can be found when the simulation results match with the experimental measurements. In this paper the experimentation is carried out i for the model a)Pre-design application of the work developed. b) Post design application of the work developed. The numerical results converge very well towards the experimental results as the coupling loss factor in simulation is varied towards the actual value. Similarly, for the second approach the experimental results converge towards the simulation results of 0.15 as the coupling loss factor of the damper that is installed on the system is varied towards 0.15.
Stereographic Circular Normal Moment Distributionmathsjournal
Minh et al (2003) and Toshihiro Abe et al (2010) proposed a new method to derive circular distributions from the existing linear models by applying Inverse stereographic projection or equivalently bilinear transformation. In this paper, a new circular model, we call it as stereographic circular normal moment distribution, is derived by inducing modified inverse stereographic projection on normal moment distribution (Akin Olosunde et al (2008)) on real line. This distribution generalizes stereographic circular normal distribution (Toshihiro Abe et al (2010)), the density and distribution functions of proposed model admit closed form. We provide explicit expressions for trigonometric moments.
FEM is about to Finite element method. In this it is described that how FEM is done and what are the steps which we have to follow for fully FEA. Finite Element Analysis is one of the most important analysis which is used in various field.
Limnological studies related to physico chemical characteristics of shri shar...eSAT Journals
Abstract The present study deals with the seasonal limnological investigation related to physico-chemical characteristics of water of the Shri Sharanabasaveshwara Lake, Karnataka State. Besides temperature and meteorological data, 11 limnological parameters were tested following standard methods at 5 sampling sites/stations of the lake. The physico-chemical parameters (pH, DO, BOD, HCO3, TDS, Chloride, Nitrate, TH, Ca, Mg and SO4 etc.) showed distinct variation in the lake sites. Keywords: Limnology, Physico-chemical parameters, Shri Sharanabasaweshwara Lake
Study on properties of concrete with different levels of replacement of cemen...eSAT Journals
Abstract Concrete is a widely used construction material which contains four major ingredients such as coarse aggregate, fine aggregate, cement and water. The consumption of concrete is increasing every year with the number of developmental activities in infrastructure sector. The production of cement involves high energy consumption. Hence, there is a need to reduce the consumption of cement in concrete by using other alternate materials which posses cementitious properties. Fly ash is one such material which can be used as a replacement to cement in concrete. The present study aims in observing the variation of strength of different grades of concrete with different levels of fly ash replacement. The objective of the study is to re-establish the findings of earlier research done in the area of fly ash concrete. The grades of concrete selected for the study are M20, M35 and M50. The fly ash replacements considered for the study are 0%, 20%, 35% and 50% of cement by weight. The results of this study indicates that for M20 and M35 grades of concrete, there is increase in strength with 35% cement replacement by fly ash. For M50 grade of concrete, there is decrease in strength for all replacement levels selected for the study. Keywords: Concrete, Cementitious material, Fly ash.
Nonlinear Viscoelastic Analysis of Laminated Composite Plates – A Multi Scale...rtme
Laminated composite plates are widely used in modern structures. Resins of composites are almost made of
polymers which show time dependent and and in some cases stress dependent behaviour. In this paper, a
laminated composite plate is analysed using a multiscale method. At first, material properties of a lamina is
obtained using an analytical micromechanical approach called simplified unit cell method (SUCM) and
then in macromechanical level, Generalized Differential Quadrature Method (GDQM) is used to analyse
laminated composite plate. Schapery's integral is used to model nonlinear viscoelastic behaviour of the
matrix. Prony series is considered to define the compliance of matrix. Micromechanical process includes
obtaining overall properties of the composite by SUCM. Both geometrical and material nonlinearity are
taken into account in order to multiscale analysis of laminated composite plate.
Application of Numerical and Experimental Simulations for the Vibrating Syste...IJERD Editor
In this work,there may be some requirements of finding out the coupling loss factors of system component.It becomes difficult to exactly know the coupling loss factor by looking at the behavior of the system. For this purpose, the numerical solution developed in this work. Initially, one need to extract the displacement, velocity and energy profiles of the system which has got the components installed for which the coupling loss factor need to be determined. Then the numerical simulations can be run for different coupling loss factor of the vibrating system and the coupling loss factor can be found when the simulation results match with the experimental measurements. In this paper the experimentation is carried out i for the model a)Pre-design application of the work developed. b) Post design application of the work developed. The numerical results converge very well towards the experimental results as the coupling loss factor in simulation is varied towards the actual value. Similarly, for the second approach the experimental results converge towards the simulation results of 0.15 as the coupling loss factor of the damper that is installed on the system is varied towards 0.15.
Stereographic Circular Normal Moment Distributionmathsjournal
Minh et al (2003) and Toshihiro Abe et al (2010) proposed a new method to derive circular distributions from the existing linear models by applying Inverse stereographic projection or equivalently bilinear transformation. In this paper, a new circular model, we call it as stereographic circular normal moment distribution, is derived by inducing modified inverse stereographic projection on normal moment distribution (Akin Olosunde et al (2008)) on real line. This distribution generalizes stereographic circular normal distribution (Toshihiro Abe et al (2010)), the density and distribution functions of proposed model admit closed form. We provide explicit expressions for trigonometric moments.
FEM is about to Finite element method. In this it is described that how FEM is done and what are the steps which we have to follow for fully FEA. Finite Element Analysis is one of the most important analysis which is used in various field.
Limnological studies related to physico chemical characteristics of shri shar...eSAT Journals
Abstract The present study deals with the seasonal limnological investigation related to physico-chemical characteristics of water of the Shri Sharanabasaveshwara Lake, Karnataka State. Besides temperature and meteorological data, 11 limnological parameters were tested following standard methods at 5 sampling sites/stations of the lake. The physico-chemical parameters (pH, DO, BOD, HCO3, TDS, Chloride, Nitrate, TH, Ca, Mg and SO4 etc.) showed distinct variation in the lake sites. Keywords: Limnology, Physico-chemical parameters, Shri Sharanabasaweshwara Lake
Study on properties of concrete with different levels of replacement of cemen...eSAT Journals
Abstract Concrete is a widely used construction material which contains four major ingredients such as coarse aggregate, fine aggregate, cement and water. The consumption of concrete is increasing every year with the number of developmental activities in infrastructure sector. The production of cement involves high energy consumption. Hence, there is a need to reduce the consumption of cement in concrete by using other alternate materials which posses cementitious properties. Fly ash is one such material which can be used as a replacement to cement in concrete. The present study aims in observing the variation of strength of different grades of concrete with different levels of fly ash replacement. The objective of the study is to re-establish the findings of earlier research done in the area of fly ash concrete. The grades of concrete selected for the study are M20, M35 and M50. The fly ash replacements considered for the study are 0%, 20%, 35% and 50% of cement by weight. The results of this study indicates that for M20 and M35 grades of concrete, there is increase in strength with 35% cement replacement by fly ash. For M50 grade of concrete, there is decrease in strength for all replacement levels selected for the study. Keywords: Concrete, Cementitious material, Fly ash.
Upgradation of low cost roughness measuring equipment and development of perf...eSAT Journals
Abstract
Today road and transport authorities around the world collectively spend large sums of money each year enhancing and maintaining their road networks. Road users in the majority of countries around the world continue to desire better and smoother roads, despite pressure on road authorities to further reduce expenditure. This pressure is brought about, because funding for road infrastructure is only one of the many priorities competing for Government funds. Pavements cannot be managed to the degree desired by decision makers, unless detailed accurate information and analysis supports the system. Road roughness data is considered one of the most important aspects of road condition information used in practice in pavement management systems.
At present in the market, we have various roughness measuring equipments starting from costliest equipment such as ARAN laser (which uses laser beam to measure the roughness) to moderately costly Bump integrator (which uses the bump counts made by the probe wheel), to cheaper equipment such as MERLIN (which uses the slope value of the wheel to calculate the roughness). In the present research work, an attempt is made to develop low cost roughness measuring equipment and to check its reliability and repeatability to minimize the calibration error. It is calibrated using Bump integrator.
Keywords: roughness, low cost equipment, calibration error
Test case prioritization using hyperlink ranking eSAT Journals
Abstract Era of cloud computing where majority of the application is becoming web based enterprise computing. User prefer online web application for easy of use and business continuity [1]. Software companies have come up in huge numbers for developing web based enterprise application. Testing is an integral part of any software company which requires more effort. Enterprise applications are complex and navigation is largely based on hyperlink connecting the web pages. Testing phase mostly associated with time constrain to accomplish the task associated in this phase. Main activity of testing phase is execution of test case to test the application. Exhaustive testing is not possible and release a software system without testing the entire application is risk [2]. This paper demonstrates how graph theory can be used to prioritize the test case execution. Keywords: Testing, Graph theory application
Abstract The evolution in the technology of automobiles has reached its peak. One of the most innovative features is the invention of driver less car or an autonomous car. An autonomous car controls the motion, sensor activation and action automatically without any human intervention. Such vehicles ensure high degree of safety, comfort and ease of driving. The project aims at designing a system to be used in such autonomous cars. The project is to develop an automatic headlight beam intensity switcher. Such a system will sense the beam status of opposing vehicle and switch the beam intensity of headlight. A sensor based mechanism is utilized to develop the system. The beam intensity switcher plays a very important role while driving. During night time, when two vehicles approach each other in opposite direction the high intensity headlight creates an effect called “Troxler effect”. This effect creates a temporary blindness for some seconds thus resulting in unfortunate accidents. Thus, the high beam of both the vehicles must be switched to low so as to have a comfortable driving. The use of such a device in cars can prevent accidents at night time due to driver inattentiveness and provides an ease of driving. We have used the Arduino UNO board as our micro-controller and application specific sensors. In our project we have designed a device which is a combination of software and hardware coding. The sensor used is a light intensity sensor named BH1750 which has a wide range of sensing capacity. The light sensor takes the “lux ” reading of the headlight rays from the opposing vehicle and checks for a threshold value assigned in the coding. Based on the threshold value the beam switches from high to low state and vice-versa when both the vehicles pass by each other. The same process takes place in opposite vehicle too. This device can be implanted on the front part of the car at an appropriate position and angle. Keywords: automatic, low cost, accurate, headlight beam intensity switcher, Troxler effect, sensor based mechanism and lux readings.
Object recognition from image using grid based color moments feature extracti...eSAT Journals
Abstract Image processing is a mechanism to convert an image into digital form and perform various operations on it, in order to get an enhanced image or to extract some useful information from it. In Image processing system, it treats images as two dimensional signals while applying number of image processing methods to them. This leads to an increasing number of generated digital images. Therefore it is required automatic systems to recognize the objects from the images. These systems may collect the number of features of a image and specification of image and consequently the different features of an object will identify the object from the image. Image processing is among rapidly growing technologies today, with its applications in various aspects of a business. Image Processing forms core research area within engineering and computer science disciplines too. Its most common and effective method is retrieve the textual features from various methods. But most of the methods do not yield the more accurate features form the image. So there is a requirement of an effective and efficient method for features extraction from the image. Moreover, images are rich in content, so some approaches are proposed based on various features derived directly from the content of the image: these are the grid-based-color-moments (GBCM) approaches. They allow users to search the desired object from image by specifying visual features (e.g., colour, texture and shape). Once the features have been defined and extracted, the retrieval becomes a task of measuring similarity between image features. In this paper, we have proposed a number of existing methods for GBCM applications. Keywords- object, grid-based-color-moments (gbcm), features, feature extraction, textual features, Image Processing, Digital form, Object Identification
Mitigation of harmonics using thyristor based 12 pulse voltage source pwm rec...eSAT Journals
Abstract Three-phase thyristor rectifiers have been used in industries for obtaining a variable dc voltage, but they have a problem of including large lower-order harmonics in the input currents. For high-power applications, a 12-pulse configuration is useful for reducing the harmonics, but it still includes the (12m ± 1) th (m: integer) harmonics. In order to further reduce the harmonics, this paper proposes to supply a ramp wave voltage at the input of a 12-pulse phase-controlled rectifier. Theoretical investigation to reduce harmonics is presented, and a strategy to control the regulated voltage and unity power factor at input side based on 12 pulse modulation technique. This paper discuss the impact of using 3-phase and 12-pulse rectifier circuit commonly found in unity power factor at input ac mains and regulate output voltage. The 12-pulse topology is known to be more expensive, but produce the least input current harmonics. However, the latter statement is completely true under balanced line conditions. In practice, the lines are inherently unbalanced. Hence, the question of whether the 12-pulse rectifier will indeed perform better in terms of the harmonics injected to the line is still under on-going discussions. This presents the modelling and simulation of both rectifier topologies to compare their input current and regulated output voltage harmonics. The rectifiers are modelled using the MATLAB/SIMULINK simulation model and several common cases conditions will be simulated to compare their harmonic levels. Keywords: Pulse Width Modulation (PWM), unity Power factor (UPF).
Abstract
This paper proposes a survey on the classification techniques of lung nodules. We have the different classifications about the nodules in the lungs. It contains the different methods of classification, segmentation and detection techniques. Malignant cell presented in the lungs named , nodules are classified for the treatment processes. Thresholding and Robust segmentation techniques are used in the segmentation process and the feature set is used for classification. Low Dose CT(Computed Tomography) images are applied. This survey has the information about the efficient techniques which are all used for the nodule classification. In these days lung cancer is the dangerous dead disease in the world, So we need to have the knowledge of that cancer. In starting stages the micro nodules are then formed into a cancer cell. Among the cancer affected population about 20% of the people are dead due to lung cancer. If nodules are found in a starting stage, we can be extend the lifetime of the patient. The main process of this paper involves with the nodule classification and segmentation process of the lung nodules. Here we taken the different procedures involved with nodule detections. CT is the most appropriate imaging technique to obtain anatomical information about lung nodules and the surrounding structures. Here we taken the Low Dose CT(LDCT) images for operations. This paper has the various approaches of the nodule classification. In this survey different techniques are presented which are used for detection and classification of the nodules in the lungs. By differentiating the nodules from the anatomical parts of the lungs, the nodules are identified.
Keywords: PLSA, Robust Segmentation and Partitioning.
Research issues and priorities in the field of agriculture sector and dairy s...eSAT Journals
Abstract Indian Agriculture is an economic symbiosis of crop production and animal rearing. In India 70 percent population and their livelihood is depending upon the agriculture. Same scenario is applicable for Tripura as well as the same North East India. Agriculture is an important sector in the economy of the North East Region (NER), with its share in state domestic product (SDP) ranging from 19 percent to 37 percent in different states. In Tripura the total population of 70% population and their livelihood is dependents on the agriculture. The paper contributes to the effectual research is very necessary and their implacability to continued development process in agriculture at Tripura. On the other aspects is animal, husbandry which is really substitute occupation for agriculture. one is dependent on another. Animal Husbandry is a state subject and the State Governments are primarily responsible for the growth of the sector. The Department of Animal Husbandry, Dairying & Fisheries has, however, been operating 30 Central Livestock Organizations and allied Institutions for production and distribution of superior germ plasms to the State Governments for cross breeding and genetic upgradation of the stocks. Besides, the Department has been implementing 11 Central Sector and Centrally Sponsored Schemes for the development of requisite infrastructure and supplementing the efforts of the State Governments for achieving the accelerated growth of animal husbandry sector. The study mainly focuses the issues of problems ,present status of animal husbandry and agriculture sector in Tripura. Keyword: Animal Husbandry, crossbreed Cattle, Research Priorities, Sri (System Rice intensification) etc.
Some approximation properties of modified baskakov stancu operatorseSAT Journals
Abstract In the present paper, we prove a global direct theorem for the modified Baskakovstancu operators in terms of Ditzian-Totik modulus of smoothness. Here, we have modified our operators by taking weight function of Beta operators and then generalizing it as stancu type generalized operators. We will also see that taking weight function of Beta operators will give better approximation. We study a global direct theorem using simultaneous approximation for ourstancu type generalized operator in 퐿푝 0,∞ . Here, first we estimate recurrence relation for moments and then develop some global direct results by making our stancu type generalized operators positive using differential and integral operators. In this paper, our effort is to give better global approximation for our stancu type generalized operator than the earlier integral modifications of Baskakov operators studied by various authors. Here, we will extend our results for the whole interval 0,∞ . In this paper, we will also make use of the fact that second modulus of smoothness introduced by Ditzian-Totik is equivalent to modified k-functional and 퐿푝푟[0,∞) is not contained in 퐿1푟[0,∞) for obtaining results. Here, Riesz-Thorin theorem and Leibnitz theorem is used extensively for doing simultaneous approximation. We have also used Fubini’s theorem for obtaining results. Key words: Stancu type generalization, simultaneous approximation, modulus of smoothness.
Economy and forecast for 2020 3 key trends in the futureeSAT Journals
Abstract The article deals with 3 key trends in the future and their general implications including 3D, RFID, Business Intelligence and new managerial positions. 3D by 2020 could replace conventional mass-production. The basic trends in the RFID aplications will be: RFID Wearables,RFID On Merchandise, Host Card Emulation (HCE) Payment Solutions,Printed RFID Technology, RFID chip tracking everyone everywhere in the near future. Business intelligence will be transformed to the general intelligence.The contribution covers the the following topics: selected Aspects of economy and social Aspects of Information Systems, complex technological and human Issues in today’s globalized and interconnected World and presents new results in the diffused way. Key words: 3 Key trends, 3D, RFID, Business Intelligence, Computer Feudal Monarchy, New Managerial Positions JEL Classification: A10, A11, A19, E27, E69
A novel dual point clamper for low-rigidity plate milling with deformation co...eSAT Journals
Abstract
The surface profile accuracy plays a significant role in achieving the overall product’s functional performance, which is seriously impacted by the cutting forces, clamping forces, and residual stresses. Conventionally, many researches about deformation compensation focus on cutting forces and fixture layout and do not consider clamping forces. Actually, clamping forces, which would dynamically change along with the movements of cutting tools, are essential in precision machining process. In this paper, a novel dual-point clamper method with adaptive deformation compensation is proposed to improve the workpieces milling precision. Based on the Generalized Principle of Superposition Method, a mathematical model considering the deflection from both cutting forces and clamping forces has been estimated and compared with the traditional clamping scheme. Both 3D finite element model (FEM) based simulation experiments and experimental case studies are carried out, and their results show good agreement with each other. The deflection computation and prediction from numerical studies indicates the efficiency and correctness of the proposed approach.
Keywords: Compensation; Deformation; Fixture; Milling
Structural sizing and shape optimisation of a load celleSAT Journals
Abstract This paper presents a structural application of a sizing and shape based on a reliability-related multi-factor optimisation. The application to a load cell design confirmed that this method is highly effective and efficient in terms of sizing and shape optimisation. A simple model of the S-type load cell is modelled in finite element analysis software and the systematic optimisation method is applied. Structural responses and geometrical sensitivities are analysed by a FE method, and reliability performance is calculated by a reliability loading-case index (RLI). The evaluation indices of performances and loading cases are formulated, and an overall performance index is presented to quantitatively evaluate a design. Index Terms: Multifactor optimisation, Finite element analysis, Load cell
Maximizing network capacity and reliable transmission in mimo cooperative net...eSAT Journals
Abstract Network capacity is an important factor to measure the performance of a network. Cooperative networking is a phenomenon which helps network to have significant gains in terms of transmission reliability and network capacity. Cooperating networking has been applied to multi-hop ad hoc networks. However, the existing works have two limitations. They support only single antenna model and three node relay scheme. The reason behind this limitation due to lack of complete understands of optimal power allocation structure Multiple Input and Multiple Output (MIMO) cooperative networks. Recently Liu et al. studied structural properties with respect to MIMO cooperative networks in presence of node power constraints. Each power allocation at source follows corresponding MIMO structure so as to ensure optimal power allocation. They establish relationship between cooperative relay and pure relay to quantify performance gain. In this paper we did experiments on this concept. Our simulations reveal that the proposed system for cooperative network is able to achieve both transmission reliability and network capacity. Keywords –Cooperative networking, MIMO, optimal power allocation, transmission reliability
Experimental investigation of performance and combustion characteristics on a...eSAT Journals
Abstract In this study, for the first time, a nanoceramic Al2O3 was used as a coating material in the low heat rejection engine concept. Experiments were conducted on single cylinder, four stroke, water cooled, and direct injection diesel engine. First, the engine was tested at different load conditions without coating. Then, combustion chamber surfaces cylinder head, cylinder liner, valves, and piston crown face were coated with nanoceramic material of Al2O3 using plasma spray method. Comparative evaluation on performance and combustion characteristics using diesel, multi-blend biodiesel and its blends was studied in the ceramic coated and uncoated engines under the same running conditions. An increase in engine power, brake thermal efficiency and a decrease in specific fuel consumption were observed in the ceramic coated engine compared to that of normal engine. Keywords: Multi-blend biodiesel, low heat rejection engine
Control analysis of a high frequency resonant inverter for induction cooking ...eSAT Journals
Abstract
Stability of three possible close-loop control of a series resonant inverter is studied for induction cooking application. Ultimately,
a single close-loop control technique is proposed in this work which can ensure both the power control as well as a satisfactory
zero voltage switching (ZVS) in a finite control range near the operating point. A phase shift controlled series resonant inverter is
used as a power supply for an induction cooking system. Its linearized model is developed for small signal analysis and a PID
controller is designed for the proposed close-loop control and its performances are judged under various operating conditions
using MATLAB/Simulink® platform.
Keywords: ZVS, linearization, bode plot, step response, PID control.
Voltage collapse mitigation by reactive power compensation at the load sideeSAT Journals
Abstract Power system stability may be defined as the property of a power system that enables it to remain in a state of operating equilibrium under normal operating conditions and to regain an acceptable state of equilibrium after being subjected to a disturbance. A general and formal definition is given below. The IEEE/CIGRE Joint Task Force has proposed the following definition-“Power system stability is the ability of an electric power system, for a given initial operating condition, to regain a state of operating equilibrium after being subjected to a physical disturbance, with most system variables bounded, so that practically the entire system remains intact.” The challenge faced in the modern power system is the collapse of voltages at heavy loads at the load buses of a power system. The voltage collapse will in turn will effect the stability of the power system. In this paper a novel way of mitigating the voltage collapse by supplying the reactive power at load buses is discussed and encouraging simulation results are obtained. The method employed is as fallows. Simulation is done without SVC and STATCOM at load buses. On comparison of the results at the load buses it is seen that with SVC and STATCOM at the load buses voltage collapse is mitigated in spite of heavily loading the system. Keywords: Voltage Collapse, Reactive Power Management, Load Bus, Power System Stability.
Determination of period of vibration of buildings with open stilt floor and s...eSAT Journals
Abstract To estimate the natural period of vibration, codes consign the empirical formula that solely relies on height of the structure. Present dissertation is carried out considering aspects such as building material, type of structure and structural dimensions. The foremost objective of the present systematic study has led to a simplified period-height equation for use in the seismic evaluation of reinforced concrete structures, taking due significance of the existence of stilt floors and shear walls. Current study also highlights the criteria that affects the period of vibration. The period of vibration which has been procured in this study represents the time period of first mode of vibration. This article comprises the seismic response of structures on different types of soil. The parameters considered for the given study are three different types of soil i.e., soft soil, medium soil and hard rock for high seismic zone and different building irregularities as per IS: 1893-2002 for 10, 15, 20 storey buildings. The analytical models for the modulus study are modeled through ETABS.V.9.2. Various parametric studies are carried out to determine the fundamental time period of the structures. These ameliorate formulas to determine the fundamental time period are developed using nonlinear regression analysis through ORIGIN pro software. The generalized equation finally obtained can be used in general form to calculate the time period of structures with open stilt floor and shear walls irrespective of soil types, seismic zone or building height. Keywords- Time period, open stilt floor, Shear walls, Irregularities in buildings, nonlinear regression
Finite element modelling of nonlocal dynamic systems, Modal analysis of nonlocal dynamical systems, Dynamics of damped nonlocal systems, Numerical illustrations
COMPARISON OF RESPONSE TO UNBALANCE OF OVERHUNG ROTOR SYSTEM FOR DIFFERENT SU...IAEME Publication
Rotor unbalance is most common fault found in the rotating machines. Methods
are adopted to analyze the position of unbalance and to bring its effect into acceptablelimit. Vibration analysis is the most common technique used to analyze the rotor
system. Research have been performed on rotor supported atboth ends, however lessstudy has been done for overhung rotor. In this paper the response of overhung rotoron isotropic support and anisotropic support subject tounbalance has been presented.and equations aresolved using MATLAB programming. The effect of unbalancehas been studied on thebode plot. Forward and Reverse whirl are observed through Campbell diagram andmode shapes are plotted.
VIBRATION ANALYSIS OF AIRFOIL MODEL WITH NONLINEAR HEREDITARY DEFORMABLE SUSP...ijmech
In the present work, the vibratory behavior of an airfoil is discussed. The airfoil is considered as twodegree-of-freedom structure with hereditary deformable suspensions. The weak singular integrodifferential equation is numerically solved using numerical integration method. Finally, numerical results for the creep response and resonance behavior of the viscoelastic materials were analyzed. These results are obtained for the perfect elastic and viscoelastic suspensions with the nonlinearity feature. As demonstrated in the airfoil model, the equation of motion with hereditary and nonlinear terms successfully illustrate realistic vibratory characteristics of two-dimensional viscoelastic problems.
ABSTRACT : In this paper, the simulation of a double pendulum with numerical solutions are discussed. The double pendulums are arranged in such a way that in the static equilibrium, one of the pendulum takes the vertical position, while the second pendulum is in a horizontal position and rests on the pad. Characteristic positions and angular velocities of both pendulums, as well as their energies at each instant of time are presented. Obtained results proved to be in accordance with the motion of the real physical system. The differentiation of the double pendulum result in four first order equations mapping the movement of the system.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Comparison of a triple inverted pendulum stabilization using optimal control ...Mustefa Jibril
In this paper, modelling design and analysis of a triple inverted pendulum have been done using
Matlab/Script toolbox. Since a triple inverted pendulum is highly nonlinear, strongly unstable
without using feedback control system. In this paper an optimal control method means a linear
quadratic regulator and pole placement controllers are used to stabilize the triple inverted
pendulum upside. The impulse response simulation of the open loop system shows us that the
pendulum is unstable. The comparison of the closed loop impulse response simulation of the
pendulum with LQR and pole placement controllers results that both controllers have stabilized
the system but the pendulum with LQR controllers have a high overshoot with long settling time
than the pendulum with pole placement controller. Finally the comparison results prove that the
pendulum with pole placement controller improve the stability of the system.
Dynamic stiffness and eigenvalues of nonlocal nano beams - new methods for dynamic analysis of nano-scale structures. This lecture gives a review and proposed new techniques.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals
A simple multi-stable chaotic jerk system with two saddle-foci equilibrium po...IJECEIAES
This paper announces a new three-dimensional chaotic jerk system with two saddle-focus equilibrium points and gives a dynamic analysis of the properties of the jerk system such as Lyapunov exponents, phase portraits, Kaplan-Yorke dimension and equilibrium points. By modifying the GenesioTesi jerk dynamics (1992), a new jerk system is derived in this research study. The new jerk model is equipped with multistability and dissipative chaos with two saddle-foci equilibrium points. By invoking backstepping technique, new results for synchronizing chaos between the proposed jerk models are successfully yielded. MultiSim software is used to implement a circuit model for the new jerk dynamics. A good qualitative agreement has been shown between the MATLAB simulations of the theoretical chaotic jerk model and the MultiSIM results.
Evaluation of Vibrational Behavior for A System With TwoDegree-of-Freedom Und...IJERA Editor
Analysis of the vibrational behavior of a system is extremely important, both for the evaluation of operating conditions, as performance and safety reason. The studies on vibration concentrate their efforts on understanding the natural phenomena and the development of mathematical theories to describe the vibration of physical systems. The purpose of this study is to evaluate an undamped system with two-degrees-of-freedom and demonstrate by comparing the results obtained in the experimental, numerical and analytical modeling the characteristics that describe a structure in terms of its natural characteristics. The experiment was conducted in PUC-MG where the data were acquired to determine the natural frequency of the system. We also developed an experimental test bed for vibrations studies for graduate and undergraduate students. In analytical modeling were represented all the important aspects of the system. In order, to obtain the mathematical equations is used MATLAB to solve the equations that describe the characteristics of system behavior. For the simulation and numerical solution of the system, we use a computational tool ABAQUS. The comparison between the results obtained in the experiment and the numerical was considered satisfactory using the exact solutions. This study demonstrates that calculation of the adopted conditions on a system with two-degrees-of-freedom can be applied to complex systems with many degrees of freedom and proved to be an excellent learning tool for determining the modal analysis of a system. One of the goals is to use the developed platform to be used as a didactical experiment system for vibration and modal analysis classes at PUC Minas. The idea is to give the students an opportunity to test, play, calculate and confirm the results in vibration and modal analysis in a low-cost platform
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Wave propagation in viscoelastic wedge with an arbitrary angle peaksIJRES Journal
Modeling of wave propagation in bodies with different geometrical form, is an urgent task. Of
particular interest is the construction of the dispersion curves for the deformable wedge considering rheological
properties of the material. The aim of this work is a theoretical study of changes in the complex phase velocity of
the wave number. The object of this study is deformable wedge. Wedge material is linearly viscoelastic. Boundary
value problem for a system of differential equations is solved using the method of lines, which allows you to use
the method of orthogonal sweep Godunov and Mueller. The calculation results obtained on the
dimensionless quantities. The viscoelastic properties of the material are described by the three-parameter
relaxation kernel Koltunov - Ryzhanitsen. For the numerical implementation of the problem, use a tool MAPLE
9.5. The results of calculations are compared with the known data [2], and differ by 6-20%. Accounting for the
viscoelastic properties of the material of the wedge increases the real part of the wave propagation velocity is 10-
15%, and also allows to evaluate the damping of the system as a whole. It is found that for small wedge angles
allowed the use of the simplified theory of Kirchhoff - Love and Timoshenko throughout the wavelength range.
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
Abstract
Soil stabilization has proven to be one of the oldest techniques to improve the soil properties. Literature review conducted revealed
that uses of natural inorganic stabilizers are found to be one of the best options for soil stabilization. In this regard an attempt has
been made to evaluate the influence of RBI-81 stabilizer on properties of black cotton soil through laboratory investigations. Black
cotton soil with varying percentages of RBI-81 viz., 0, 0.5, 1, 1.5, 2, and 2.5 percent were studied for moisture density relationships
and strength behaviour of soils. Also the effect of curing period was evaluated as literature review clearly emphasized the strength
gain of soils stabilized with RBI-81 over a period of time. The results obtained shows that the unconfined compressive strength of
specimens treated with RBI-81 increased approximately by 250% for a curing period of 28 days as compared to virgin soil. Further
the CBR value improved approximately by 400%. The studies indicated an increasing trend for soil strength behaviour with
increasing percentage of RBI-81 suggesting its potential applications in soil stabilization.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
Abstract
Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
Abstract
Increase in traffic along with heavier magnitude of wheel loads cause rapid deterioration in pavements. There is a need to improve
density, strength of soil subgrade and other pavement layers. In this study an attempt is made to improve the properties of locally
available loamy soil using twin approaches viz., i) increasing the compaction of soil and ii) treating the soil with chemical stabilizer.
Laboratory studies are carried out on both untreated and treated soil samples compacted by different compaction efforts. Studies
show that increase in compaction effort results in increase in density of soil. However in soil treated with chemical stabilizer, rate of
increase in density is not significant. The soil treated with chemical stabilizer exhibits improvement in both strength and performance
properties.
Keywords: compaction, density, subgradestabilization, resilient modulus
Geographical information system (gis) for water resources managementeSAT Journals
Abstract
Water resources projects are inherited with overlapping and at times conflicting objectives. These projects are often of varied sizes
ranging from major projects with command areas of millions of hectares to very small projects implemented at the local level. Thus,
in all these projects there is seldom proper coordination which is essential for ensuring collective sustainability.
Integrated watershed development and management is the accepted answer but in turn requires a comprehensive framework that can
enable planning process involving all the stakeholders at different levels and scales is compulsory. Such a unified hydrological
framework is essential to evaluate the cause and effect of all the proposed actions within the drainage basins.
The present paper describes a hydrological framework developed in the form of a Hydrologic Information System (HIS) which is
intended to meet the specific information needs of the various line departments of a typical State connected with water related aspects.
The HIS consist of a hydrologic information database coupled with tools for collating primary and secondary data and tools for
analyzing and visualizing the data and information. The HIS also incorporates hydrological model base for indirect assessment of
various entities of water balance in space and time. The framework would be maintained and updated to reflect fully the most
accurate ground truth data and the infrastructure requirements for planning and management.
Keywords: Hydrological Information System (HIS); WebGIS; Data Model; Web Mapping Services
Forest type mapping of bidar forest division, karnataka using geoinformatics ...eSAT Journals
Abstract
The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
Abstract
To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
Keywords: Light weight concrete, GFRP, Artificial Neural Network, Linear Regression, Back propagation, orthogonal
Array, Latin Squares
Experimental behavior of circular hsscfrc filled steel tubular columns under ...eSAT Journals
Abstract
This paper presents an outlook on experimental behavior and a comparison with predicted formula on the behaviour of circular
concentrically loaded self-consolidating fibre reinforced concrete filled steel tube columns (HSSCFRC). Forty-five specimens were
tested. The main parameters varied in the tests are: (1) percentage of fiber (2) tube diameter or width to wall thickness ratio (D/t
from 15 to 25) (3) L/d ratio from 2.97 to 7.04 the results from these predictions were compared with the experimental data. The
experimental results) were also validated in this study.
Keywords: Self-compacting concrete; Concrete-filled steel tube; axial load behavior; Ultimate capacity.
Evaluation of punching shear in flat slabseSAT Journals
Abstract
Flat-slab construction has been widely used in construction today because of many advantages that it offers. The basic philosophy in
the design of flat slab is to consider only gravity forces; this method ignores the effect of punching shear due to unbalanced moments
at the slab column junction which is critical. An attempt has been made to generate generalized design sheets which accounts both
punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
design.
Keywords: Flat slabs, punching shear, unbalanced moment.
Evaluation of performance of intake tower dam for recent earthquake in indiaeSAT Journals
Abstract
Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
study on dynamic behavior of circular cylindrical towers can be carried out to study the effect of depth of submergence, wall thickness
and slenderness ratio, and also effect on tower considering dynamic analysis for time history function of different soil condition and
by Goyal and Chopra accounting interaction effects of added hydrodynamic mass of surrounding and inside water in intake tower of
dam
Key words: Hydrodynamic mass, Depth of submergence, Reservoir, Time history analysis,
Evaluation of operational efficiency of urban road network using travel time ...eSAT Journals
Abstract
Efficiency of the road network system is analyzed by travel time reliability measures. The study overlooks on an important measure of
travel time reliability and prioritizing Tiruchirappalli road network. Traffic volume and travel time were collected using license plate
matching method. Travel time measures were estimated from average travel time and 95th travel time. Effect of non-motorized vehicle
on efficiency of road system was evaluated. Relation between buffer time index and traffic volume was created. Travel time model has
been developed and travel time measure was validated. Then service quality of road sections in network were graded based on
travel time reliability measures.
Keywords: Buffer Time Index (BTI); Average Travel Time (ATT); Travel Time Reliability (TTR); Buffer Time (BT).
Estimation of surface runoff in nallur amanikere watershed using scs cn methodeSAT Journals
Abstract
The development of watershed aims at productive utilization of all the available natural resources in the entire area extending from
ridge line to stream outlet. The per capita availability of land for cultivation has been decreasing over the years. Therefore, water and
the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
415.68 Sq. km. The thematic layers such as land use/land cover and soil maps were derived from remotely sensed data and overlayed
through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
the watershed (2001-2011) was used to estimate the daily runoff from the watershed using Soil Conservation Service - Curve Number
(SCS-CN) method. The runoff estimated from the SCS-CN model was then used to know the variation of runoff potential with different
land use/land cover and with different soil conditions.
Keywords: Watershed, Nallur watershed, Surface runoff, Rainfall-Runoff, SCS-CN, Remote Sensing, GIS.
Estimation of morphometric parameters and runoff using rs & gis techniqueseSAT Journals
Abstract
Land and water are the two vital natural resources, the optimal management of these resources with minimum adverse environmental
impact are essential not only for sustainable development but also for human survival. Satellite remote sensing with geographic
information system has a pragmatic approach to map and generate spatial input layers of predicting response behavior and yield of
watershed. Hence, in the present study an attempt has been made to understand the hydrological process of the catchment at the
watershed level by drawing the inferences from moprhometric analysis and runoff. The study area chosen for the present study is
Yagachi catchment situated in Chickamaglur and Hassan district lies geographically at a longitude 75⁰52’08.77”E and
13⁰10’50.77”N latitude. It covers an area of 559.493 Sq.km. Morphometric analysis is carried out to estimate morphometric
parameters at Micro-watershed to understand the hydrological response of the catchment at the Micro-watershed level. Daily runoff
is estimated using USDA SCS curve number model for a period of 10 years from 2001 to 2010. The rainfall runoff relationship of the
study shows there is a positive correlation.
Keywords: morphometric analysis, runoff, remote sensing and GIS, SCS - method
-
Effect of variation of plastic hinge length on the results of non linear anal...eSAT Journals
Abstract The nonlinear Static procedure also well known as pushover analysis is method where in monotonically increasing loads are applied to the structure till the structure is unable to resist any further load. It is a popular tool for seismic performance evaluation of existing and new structures. In literature lot of research has been carried out on conventional pushover analysis and after knowing deficiency efforts have been made to improve it. But actual test results to verify the analytically obtained pushover results are rarely available. It has been found that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. Initial study is carried out by considering user defined hinge properties and default hinge length. Attempt is being made to assess the variation of pushover analysis results by considering user defined hinge properties and various hinge length formulations available in literature and results compared with experimentally obtained results based on test carried out on a G+2 storied RCC framed structure. For the present study two geometric models viz bare frame and rigid frame model is considered and it is found that the results of pushover analysis are very sensitive to geometric model and hinge length adopted. Keywords: Pushover analysis, Base shear, Displacement, hinge length, moment curvature analysis
Effect of use of recycled materials on indirect tensile strength of asphalt c...eSAT Journals
Abstract
Depletion of natural resources and aggregate quarries for the road construction is a serious problem to procure materials. Hence
recycling or reuse of material is beneficial. On emphasizing development in sustainable construction in the present era, recycling of
asphalt pavements is one of the effective and proven rehabilitation processes. For the laboratory investigations reclaimed asphalt
pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
Tensile Strength (ITS) for AC mixes with RAP also was found to be higher when compared to conventional AC mixes at 300C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Final project report on grocery store management system..pdf
Modeling of the damped oscillations of the viscous beams structures with swivel joints for harmonic mode
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
Volume: 02 Issue: 07 | Jul-2013, Available @ http://www.ijret.org 151
MODELING OF THE DAMPED OSCILLATIONS OF THE VISCOUS
BEAMS STRUCTURES WITH SWIVEL JOINTS FOR HARMONIC MODE
M. Dawoua Kaoutoing1
, G.E Ntamack2
, K. Mansouri3
, T.Beda4
, S. Charif D'Ouazzane5
1, 2, 4
Groupe de Mécanique et des Matériaux, GMM, Département de Physique, Faculté des Sciences, Université de
Ngaounderé, Cameroun, dawouakaoutoingmaxime@yahoo.fr, guyedgar@yahoo.fr, tbeda@yahoo.fr
3
Laboratoire des Signaux, Systèmes Distribués et Intelligence Artificielle (LSSDIA) ENSET de Mohammedia, Université
Hassan II Mohammédia Casablanca, Maroc, khmansouri@hotmail.fr
5
Laboratoire de Mécanique, Thermique et Matériaux, LMTM, Ecole Nationale de l’Industrie Minérale, ENIM, B.P. 753
Rabat, Maroc, charif.enim@hotmail.com
Abstract
Mechanic studies realized on the two dimensional beams structures with swivel joints show that in statics, the vertical displacement is
continuous, but the rotation is discontinuous at the node where there is a swivel joint. Moreover, in dynamics, many authors do not
usually take into account the friction effect, modeling of these structures. We propose in this paper, a modeling of the beams structures
with swivel joints which integrates viscosity effects in dynamics. Hence this work we will present the formulation of motion equations
of such structures and the modal analysis method which is used to solve these equations.
Keywords: Beams, Swivel joint, Viscosity, Vibration, Modal Method.
---------------------------------------------------------------------***----------------------------------------------------------------------
1. INTRODUCTION
Swivel joint is a spherical mechanical piece used as
articulation in the framework, which allows turning over in all
directions [1]. The swivel joint does not transmit moment. Its
action is reduced to a force passing through its center [2, 3].
The work carried out on the framework in beams with swivel
joints indicates that, in statics there is continuity of the arrow,
but a discontinuity of rotation to the swivel node [4, 5.6]. In
dynamics, frictions are often neglected during the evaluation
of the degrees of freedom of the structures containing swivel
joints. In this work, we propose a technique of calculation
which helps to evaluate the vertical displacement and rotation,
taking into account the frictions in the calculation of the
degrees of freedom of the structures in beams with swivel
joint in dynamics. The evaluation of these degrees of freedom
is based on the setting in equation of these structures in
dynamics and given their solutions by the modal method.
This paper is organized in the following ways: in the first part,
we present the model which enables us to establish the motion
equations of such structures. This step is followed by the
presentation of the solution of these equations by the modal
method of analysis. The last part of this work is related to the
analysis and the discussion of results.
2. THEORETICAL MODEL
When a swivel joint is inserted between two beams, the node
that makes connection between the two points, we can
consider that one of the nodes is embedded in the beam and
the other is a steering joint [1]. As an example let us consider
the structure of the following figure with a swivel joint at node
2.
Figure 1: Structure in beams with a swivel joint
The node with swivel joint is modeled by two nodes, a node
kneecap and an embedded node as shown in figure 2:
L L
321
X
Y
p
2. IJRET: International Journal of Research in Engineering and Technology ISSN: 2319-1163
__________________________________________________________________________________________
Volume: 02 Issue: 07 | Jul-2013, Available @ http://www.ijret.org 152
Figure 2: Modeling the swivel joints, node 2 with swivel
joint, node 4 with embedded node
Study of the swivel joint’s problem consists of determining the
value of displacements and rotations of node 2 and 4. In statics
several works are related to the evaluation of these degrees of
freedom [5, 6]. In these references vertical displacements of
nodes 2 and 4 are identical. The rotation of node with swivel
joint, node 2 is locally evaluated by solving the elementary
system of statics equations. But to determine the rotation of
the embedded node 4, it is initially necessary to make the
assembly of the global stiffness matrix of all the frameworks,
by taking into account the disturbance of the elements with
swivel joint nodes. In this work, we will propose a technique
to evaluate the same degrees of freedom, in dynamics and
introducing viscosity for the swivel joint nodes .The motion
equations of a framework in dynamics with external forces can
be formulated as following:
( )Mu Cu Ku f t (1)
In equation (1),
M, is the mass matrix;
C, is the damping matrix;
K, the stiffness matrix;
F(t), is the external disturbance.
In general to solve the system of equations (1), inverse
methods are used, which consists of going from physical space
to space modes, to find the solution in modal space and to
come back to physical space [3, 6, 7]. In the case of
framework with viscosity, by considering structure of figure 1
example f, by using modal method analysis, we obtain a
system in the following form:
1 1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2
3 3 3 3 3 3 3 3
4 4 4 4 4 4 4 4
0 0 0 2 0 0 0 0 0 0 (
0 0 0 0 2 0 0 0 0 0
0 0 0 0 0 2 0 0 0 0
0 0 0 0 0 0 2 0 0 0
m m k f
m m k
m m k
m m k
2
3
4
)
( )
( )
( )
t
f t
f t
f t
(2)
It is a system of uncoupled equations where each i mode is put
in the following form [4]:
2 ( )
2 i
i i i i i i
i
f t
m
(3)
Equation (3) has as the following solution:
1 11
1 02
1 1
2 22
2 02
2 2
3 33
3 02
3 3
4 44
4 02
4 4
( )
( )
( )
( )
( )
T j t
T j t
T j t
T j t
H
q x x F e
m
H
q x x F e
m
q t
H
q x x F e
m
H
q x x F e
m
(4)
Where:
i
x are the eigenvectors;
i
i are the self throb;
iH amplification dynamic factor of.
To calculate the rotation of node 2, we have to solve the
elementary system (1), by writing in the member of the
elementary force 02 tf . But to calculate the rotation of
node 4, it is initially necessary to assemble all global matrices
of the structure. In the continuation of this work, we present
the solutions obtained in the evaluation of the rotation of the
node kneecap 2 on the case of figure 1 structure.
3. SIMULATIONS AND ANALYSIS OF RESULTS
For simulations, we will consider identical beams of constant
cross-section S, quadratic moment IZ, density and Young’s
modulus E. The selected beams have the length L, of type IPN
of iron with the following mechanical characteristics:
E=210000 MPa,
4
=77,67 cmzI S=7,57 cm2
,
3
/7850 mKg [8].
The useful part, after taking into account the boundary
conditions, the motions equation of the structure in figure 1,
subjected to harmonic excitations is in the form:
3
p
2 41
P
3. IJRET: International Journal of Research in Engineering and Technology ISSN: 2319-1163
__________________________________________________________________________________________
Volume: 02 Issue: 07 | Jul-2013, Available @ http://www.ijret.org 153
0
sin
80
06
0
0
80
0280
1680
0
2
2
23
2
2
2
1
2
2
2
tPv
LL
EIv
C
Cv
L
SL fz
(5)
The solution of this system is:
1
2
0
22
1
( ) ( ) ( ) ( ) ( cos sin ) sin( )
1 2
t
h p a a f
P
v t v t v t v t e A t B t t
K
(6)
With:
f
and:
t =
tAe t
Where:
=
2
1 f
The amplitude and the phase are:
0
00
2
002
0
arctan
A
The self throbs of the structure are:
1 4
6 zEI
sL
et 2 4
40,98 zEI
sL
When taking 0 0.5v m ,
1
0 1v ms
, 0 0.5rad , and
-1
0 1 rad s we obtain in the case as of free vibrations the
solution represented on figure 3:
Figure 3: Graphs rotation and vertical displacement of node 2
of damping structure against time
When taking, 0 0.5v m ,
1
0 1v ms
, 0 0.5rad and
-1
0 1 rad s under harmonic forces of vibration amplitude
P0=10N and in the case of weak oscillations ( 0.5 ), we
obtain the solution represented in figure 4:
Figure 4: Graph of rotation of the node 2 of viscous swivel
joint under harmonic force against time
When we plotted the rotation curves as a function of time, in
figure 3, for t varying from 0 to 40 s per step of 0.01 s, we
observed the attenuation of rotation, which characterizes the
presence of damping. Beyond 0.12 s, rotation stops probably
because of viscosity. To look further into this phenomenon, it
is necessary to make several tests while varying the damping
ratio.
On figure 4, t varies from 0 to 40 s and we did not observe the
disappearance of signal. This is due to the presence of the
external forces which are supposed to be harmonic. With this
assumption rotation is maintained during the vibration of the
4. IJRET: International Journal of Research in Engineering and Technology ISSN: 2319-1163
__________________________________________________________________________________________
Volume: 02 Issue: 07 | Jul-2013, Available @ http://www.ijret.org 154
framework. But that in the case of figure 3 (damped free
oscillations) or the case of figure 4 (quenched forced
oscillations) a major analysis of these swivel joints requires
the comparison between the rotation of the swivel node and
the node embedded in order to better understand the influence
of these connections in the structures. This is the direction in
which we will pursue our research in this field.
CONCLUSIONS
The work aims at proposing a method of modeling beams
structures with swivel joints by taking into account the
frictions in dynamics. The Lagrange’s method allowed us to
establish the motion equations of frameworks. The technical
modal analysis permitted to solve the system of motion
equations obtained and the cancellation of the transmission of
moments in swivel nodes to the embedded node enabled.
Graphs of the results give the opportunity to see the behavior
of the deadened and free forced structures. But the completion
of these swivel joints study requires investigation of several
comparison and damping ratios between the behavior of the
swivel nodes and the embedded nodes at the node where there
is a swivel joint.
REFERENCES
[1] J.L. Batoz et G.Dhatt, «Modélisation des structures par
éléments finis. Hermes Volume 2: poutres et plaques»
(1990).
[2] L. R. Rakotomanana, «Eléments de dynamique des
solides et structures déformables», Université de
Rennes 1, (2006).
[3] M. J.Turner, R. W. Clough, H. C. Marlin, and L. J.
Topp, «Stiffness and deflection analysis of complex
structures». J. Aero. Sci., vol.23, (1956), PP 805-823.
[4] J.F. Imbert, «Analyse des structures par éléments finis.
Ecole nationale supérieure de l’aéronautique et de
l’espace». 3ème édition, Cepaduès édition 111, rue
Nicolas – Vauquelin 31100 Toulouse.
[5] H. Bouabid, S. Charif d'Ouazzane, O. Fassi-Fehri et K.
Zine-dine A, «Representation of swivel joints in
computing tridimensional structures» 3ème
Congrès de
Mécanique, Tétouan, (1997).
[6] G.E. Ntamack, M. Dawoua Kaoutoing, T. Beda, S.
Charif D’Ouazzane. «Modeling of swivel joint in two
dimensional beams frameworks». Int. J. Sc. and Tech.
3, 1, (2013), 21-25.
[7] R. J. Guyan, « Reduction of stiffness and Mass
Matrices », AIAA, 3; 80, (1965).
[8] Kerguignas, «La méthode des déplacements:
application à la résolution des structures planes à nœuds
rigides», EMI-RABAT, (1982).
[9] A. Bennani, V. Blanchot, G. Lhermet, M. Massenzio, S.
Ronel, «Dimensionnement des structures», (2007).