This document discusses structural analysis and beam analysis. It covers topics such as support reactions, shear force and bending moment diagrams, equilibrium of forces in structures, and determinacy. Key points include:
1. To design structures, it is necessary to know bending moments, torsion moments, shear forces, and axial forces in each member.
2. Equilibrium requires that the downward forces from gravity have equal and opposite upward reaction forces.
3. Shear force and bending moment diagrams show the variation of these internal forces along a beam under different loading conditions.
Stiffness method of structural analysisKaran Patel
This method is a powerful tool for analyzing indeterminate structures. One of its advantages over the flexibility method is that it is conducive to computer programming.
Stiffness method the unknowns are the joint displacements in the structure, which are automatically specified.
Stiffness method of structural analysisKaran Patel
This method is a powerful tool for analyzing indeterminate structures. One of its advantages over the flexibility method is that it is conducive to computer programming.
Stiffness method the unknowns are the joint displacements in the structure, which are automatically specified.
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.
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
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
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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.
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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.
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The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
3. Information
• To design a structure it is necessary to know in each member:
1. Bending moments
2. Torsion moments
3. Shear forces
4. Axial forces
4. Equilibrium
• The goal of the whole design process is to achieve an equilibrium of the
forces acting upon a structure.
• Without equilibrium the building will move and that is not good
• For all of the forces acting downward due to gravity, an equal, opposite force
called a reaction must be pushing up.
• All of the loads acting on a structure will ultimately accumulate in the
foundation and must be met with an equivalent reaction from the earth
below.
5. Forces
• Forces are a type of quantity called vectors
– Defined by magnitude and direction
• Statement of equilibrium
– Net force at a point in a structure = zero (summation of forces = zero)
• Net force at a point is determined using a force polygon to
account for magnitude and direction
10. SUPPORT CONNECTION
Support Connections
Pin connection (allows slight rotation)
Roller support (allows slight
rotation/translation)
Fixed joint (allows no
rotation/translation)
11. SUPPORT CONNECTION
• In reality, all connections and supports are modelled with assumptions.
• Need to be aware how the assumptions will affect the actual
performance.
12. FIXED SUPPORT
• No thickness for the components
• The support at A can be modelled as a fixed support
14. Static equilibrium
• The state of an object when it is at rest or moving with a
constant velocity.
• There may be several forces acting on the object.
• If they are canceling each other out and the object is not
accelerating, then it is in a state of static equilibrium.
15. Static Equilibrium
• Since the externally applied force system is in equilibrium, the
three equations of static equilibrium must be satisfied, i.e.
• +ve ↑ ΣFy = 0 The sum of the vertical forces must equal zero.
• +ve ΣM = 0 The sum of the moments of all forces about any
point on the plane of the forces must equal zero.
• +ve → ΣFx = 0 The sum of the horizontal forces must equal zero.
* The assumed positive direction is as indicated.
16. Equations of Equilibrium
• A structure or one of its
members in equilibrium is called
statics member when its balance
of force and moment.
• In general this requires that force
and moment in three
independent axes, namely
0
,
0
0
,
0
0
,
0
=
=
=
=
=
=
∑
∑
∑
∑
∑
∑
z
z
y
y
x
x
M
F
M
F
M
F
18. Free body diagram
• When using equilibrium equation, first draw free body
diagram of the member.
• In general, internal loadings acting at the section will consist
of Normal force (N), Shear force (V) and bending moment
(M)
19. Determinacy and Stability
• Statically Determinate r = 3n
• Statically Indeterminate r > 3n
• Unstable r < 3n
Where r = reaction
n = parts
20. Determinacy and Stability
• If the reaction forces can be determined solely from the
equilibrium EQs → STATICALLY DETERMINATE STRUCTURE
• No. of unknown forces > equilibrium EQs → STATICALLY
INDETERMINATE STRUCTURE
• Can be viewed globally or locally (via free body diagram)
21. Determinacy of beam
• Determinacy and Indeterminacy
– For a 2D structure
ate
indetermin
statically
,
3
e
determinat
statically
,
3
n
r
n
r
>
=
No. of force and moment
reaction components
No. of parts
mechanism
e
collapsibl
a
form
component
or
parallel
or
consurrent
are
reaction
member
if
unstable
:
3n
r
unstable
@
acy
indetermin
of
degree
:
3
≥
< n
r
22. Reaction on a support connection
• For rolled support (r = 1)
• For pin support (r = 2)
• For fixed support (r=3)
Fy
Fy
Fx
Fy
Fx
M
25. Example 1
• Classify each of the beams as statically determinate or statically
indeterminate. If statically indeterminate, report the no. of degree
of indeterminacy. The beams are subjected to external loadings
that are assumed to be known & can act anywhere on the beams.
26.
27. Example 2
• Classify each of the pin-connected structures as statically
determinate or statically indeterminate. If statically
indeterminate, report the no. of degree of indeterminacy.
The structures are subjected to arbitrary external loadings
that are assumed to be known & can act anywhere on the
structures.
30. Procedure of Analysis
• Disassemble the structure and draw a free–body
diagram of each member.
Free Body Diagram
• The total number of unknowns should be equal to
the number of equilibrium equations
Equation of Equilibrium
35. Shear Force & Bending Moment
• Two parameters which are fundamentally important to the
design of beams are shear force and bending moment.
• These quantities are the result of internal forces acting on
the material of a beam in response to an externally applied
load system.
37. Shear Force Diagram (SFD)
• The calculation carried out to determine the shear force can be
repeated at various locations along a beam and the values obtained
plotted as a graph; this graph is known as the shear force diagram.
• The shear force diagram indicates the variation of the shear force
along a structural member.
38. Bending Moment Diagram
• Bending inducing tension on the underside of a beam is
considered positive.
• Bending inducing tension on the top of a beam is
considered negative.
39. Bending Moment Diagram
• Note: Clockwise/anti-clockwise moments do not define +ve or
−ve bending moments.
• The sign of the bending moment is governed by the location of the
tension surface at the point being considered.
• As with shear forces the calculation for bending moments can be
carried out at various locations along a beam and the values
plotted on a graph; this graph is known as the‘bending moment
diagram’.
• The bending moment diagram indicates the variation in the
bending moment along a structural member.
40. Shear Force and Bending Moment Diagram
• If the variations of V & M are plotted, the graphs are termed the shear
diagram and moment diagram
• Changes in shear= Area under distributed load diagram
• Changes in moment = Area under shear diagram
44. Example 5 : Simply supported beam with point loads
Consider a simply supported beam as shown in Figure 1 carrying a
series of secondary beams each imposing a point load of 4 kN.
• i) determine the support reactions,
• ii) sketch the shear force diagram and
• iii) sketch the bending moment diagram indicating the maximum
value(s).
Figure 1: Simply supported beam
46. Example 6: Simply supported beam with UDL
Consider a simply-supported beam carrying a uniformly distributed load of
5 kN/m, as shown in Figure 2
i) determine the support reactions,
ii) sketch the shear force diagram and
iii) sketch the bending moment diagram indicating the maximum value(s).
Figure 2
47. Example 7: Simply supported beam
• The one-span simply supported beam carries a distributed
permanent action including self-weight of 25 kN/, a permanent
concentrated partition load of 30 kN at mid-span and distributed
load of 10 kN/m. Draw SFD and BMD.