This document discusses free vibration in mechanical systems. It begins by defining vibratory motion as the oscillatory motion that occurs when an elastic body is displaced from its equilibrium position and released. Free or natural vibration occurs when no external forces act on the system after an initial displacement. Types of free vibration are defined based on the direction of particle motion, including longitudinal, transverse, and torsional. Methods for determining the natural frequency of free vibration, including equilibrium, energy, and Rayleigh's methods, are outlined. Damped vibration and concepts such as damping ratio and logarithmic decrement are also introduced. The document concludes by discussing free torsional vibrations in single, two, and three rotor systems.
"The World of Vibration: Exploring Understanding, Effects, and Control"
Welcome to our website dedicated to the intriguing realm of vibration. Vibration is a fundamental and omnipresent force that shapes our world. From the tiniest particles to the grandest structures, it influences everything around us. In this online resource, we'll delve into the essence of vibration, understanding its core principles, exploring its diverse manifestations, and discovering how it impacts our lives.
Whether you're a student, researcher, engineer, or simply curious about the vibrations that surround us, you've come to the right place. Join us on this informative journey as we unlock the secrets of vibration, its causes, effects, and innovative techniques for control and mitigation. Together, we'll gain a deeper appreciation for this dynamic force that shapes our world. Welcome to the world of vibration.
"The World of Vibration: Exploring Understanding, Effects, and Control"
Welcome to our website dedicated to the intriguing realm of vibration. Vibration is a fundamental and omnipresent force that shapes our world. From the tiniest particles to the grandest structures, it influences everything around us. In this online resource, we'll delve into the essence of vibration, understanding its core principles, exploring its diverse manifestations, and discovering how it impacts our lives.
Whether you're a student, researcher, engineer, or simply curious about the vibrations that surround us, you've come to the right place. Join us on this informative journey as we unlock the secrets of vibration, its causes, effects, and innovative techniques for control and mitigation. Together, we'll gain a deeper appreciation for this dynamic force that shapes our world. Welcome to the world of vibration.
This presentation gives an introduction to mechanical vibration or Theory of Vibration for BE courses. Presentation is prepared as per the syllabus of VTU.For any suggestions and criticisms please mail to: hareeshang@gmail.com or visit:ww.hareeshang.wikifoundry.com.
Thanks for watching this presentation.
Hareesha N G
this slide deals with the basic concepts related to mechanical vibrations for more information you can go through any mechanical vibration book available for engineering students
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.
This presentation gives an introduction to mechanical vibration or Theory of Vibration for BE courses. Presentation is prepared as per the syllabus of VTU.For any suggestions and criticisms please mail to: hareeshang@gmail.com or visit:ww.hareeshang.wikifoundry.com.
Thanks for watching this presentation.
Hareesha N G
this slide deals with the basic concepts related to mechanical vibrations for more information you can go through any mechanical vibration book available for engineering students
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.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
1. Unit III
FREE VIBRATION
DYNAMICS OF MACHINES
FREE VIBRATION
DOM - B.K.P 1
B.K.Parrthipan, M.E., M.B.A., (Ph.D).,
Assistant Professor / Mechanical Engineering
Kamaraj College of Engineering and Technology.
2. Introduction - Vibratory systems
When elastic bodies such as a spring, a beam and a shaft
are displaced from the equilibrium position by the application
of external forces, and then released, they execute a vibratory
motion.
This is due to the reason that, when a body is displaced,
This is due to the reason that, when a body is displaced,
the internal forces in the form of elastic or strain energy are
present in the body. At release, these forces bring the body to
its original position.
2
DOM - B.K.P
3. Introduction - Vibratory systems
When the body reaches the equilibrium position, the
whole of the elastic or strain energy is converted into kinetic
energy due to which the body continues to move in the
opposite direction.
The whole of the kinetic energy is again converted into
The whole of the kinetic energy is again converted into
strain energy due to which the body again returns to the
equilibrium position. In this way, the vibratory motion is
repeated indefinitely.
3
DOM - B.K.P
4. Terms Used in Vibratory Motion
1. Period of vibration or time period.
It is the time interval after which the motion is repeated
itself. The period of vibration is usually expressed in seconds.
2. Cycle.
It is the motion completed during one time period.
It is the motion completed during one time period.
3. Frequency.
It is the number of cycles described in one second. In S.I.
units, the frequency is expressed in hertz (briefly written as
Hz) which is equal to one cycle per second.
4
DOM - B.K.P
5. Types of Vibratory Motion
According to the Actuating force
1. Free or natural vibrations.
When no external force acts on the body, after giving it an
initial displacement, then the body is said to be under free or
natural vibrations. The frequency of the free vibrations is
natural vibrations. The frequency of the free vibrations is
called free or natural frequency.
2. Forced vibrations.
When the body vibrates under the influence of external
force, then the body is said to be under forced vibrations. The
external force applied to the body is a periodic disturbing force
created by unbalance. The vibrations have the same frequency
as the applied force.
5
DOM - B.K.P
6. Types of Vibratory Motion
3. Damped vibrations.
When there is a reduction in amplitude over every cycle
of vibration, the motion is said to be damped vibration. This is
due to the fact that a certain amount of energy possessed by
the vibrating system is always dissipated in overcoming
the vibrating system is always dissipated in overcoming
frictional resistances to the motion.
6
DOM - B.K.P
7. Degree of freedom
The minimum number of independent coordinates
required to specify the motion of a system at any instant is
known as Degree of freedom (D.O.F) of the system.
7
DOM - B.K.P
8. Single DOF
The system shown in this figure is what is known as a
Single Degree of Freedom system. We use the term degree of
freedom to refer to the number of coordinates that are required
to specify completely the configuration of the system. Here, if
the position of the mass of the system is specified then
the position of the mass of the system is specified then
accordingly the position of the spring and damper are also
identified. Thus we need just one coordinate (that of the mass)
to specify the system completely and hence it is known as a
single degree of freedom system.
8
DOM - B.K.P
10. Types of Free Vibrations
According to the motion of system with respect to axis
1. Longitudinal vibrations,
2. Transverse vibrations, and
3. Torsional vibrations.
10
DOM - B.K.P
11. 1. Longitudinal vibrations
When the particles of the shaft or disc moves parallel to
the axis of the shaft, then the vibrations are known as
longitudinal vibrations.
2. Transverse vibrations.
When the particles of the shaft or disc move
Types of Free Vibrations
When the particles of the shaft or disc move
approximately perpendicular to the axis of the shaft, then the
vibrations are known as transverse vibrations.
3. Torsional vibrations
When the particles of the shaft or disc move in a circle
about the axis of the shaft, then the vibrations are known as
torsional vibrations.
11
DOM - B.K.P
12. Natural Frequency
It is the number of cycles described in one
second. In S.I. units, the frequency is
expressed in hertz (briefly written as Hz)
expressed in hertz (briefly written as Hz)
which is equal to one cycle per second.
DOM - B.K.P 12
13. Equation of Motion – Natural
Frequency
The natural frequency of the free longitudinal vibrations
may be determined by the following three methods :
1. Equilibrium Method
2. Energy method
3. Rayleigh’s method
DOM - B.K.P 13
16. 2. Energy method
• We know that the kinetic energy is due to the motion of the
body and the potential energy is with respect to a certain
datum position which is equal to the amount of work required
to move the body from the datum position.
• In the case of vibrations, the datum position is the mean or
equilibrium position at which the potential energy of the body
or the system is zero.
equilibrium position at which the potential energy of the body
or the system is zero.
• In the free vibrations, no energy is transferred to the system or
from the system. Therefore the summation of kinetic energy
and potential energy must be a constant quantity which is same
at all the times.
• In other words,
DOM - B.K.P 16
24. Damped Vibration
It is the resistance to the motion of a vibrating body. The
vibrations associated with this resistance are known as damped
vibrations.
The coefficient of damping is denoted by c.
DOM - B.K.P 24
25. Critical damping coefficient
The critical damping coefficient (cc)is the amount of
damping required for a system to be critically damped.
DOM - B.K.P 25
26. Damping Factor or Damping Ratio
The ratio of the actual damping coefficient (c) to the
critical damping coefficient (cc) is known as damping factor
or damping ratio.
Mathematically,
DOM - B.K.P 26
The damping ratio is a system parameter, denoted by ζ (zeta),
• if ζ > 1, then the system is said to be over damped
• if ζ =1, then the system is said to be critically damped
• if ζ < 1, then the system is said to be under damped.
27. Logarithmic Decrement
It is defined as the natural logarithm of the amplitude
reduction factor. The amplitude reduction factor is the ratio of
any two successive amplitudes on the same side of the mean
position.
DOM - B.K.P 27
28. Critical Speed
The speed at which the shaft runs so that the additional
deflection of the shaft from the axis of rotation becomes
infinite, is known as critical or whirling speed.
The speed at which resonance will occur is known as
critical speed. Resonance is the condition at which the induced
frequency is equal to the applied frequency.
DOM - B.K.P 28
29. Torsional vibrations
when the particles of a shaft or disc move in a circle about
the axis of a shaft, then the vibrations are known as torsional
vibrations.
DOM - B.K.P 29