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 |  موضوع: كتاب Structural Dynamics and Vibration in Practice الخميس 21 يونيو 2012, 12:26 am | |
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Structural Dynamics and Vibration in Practice
ويتناول الموضوعات الأتية :
Chapter Basic Concepts
Statics, dynamics and structural dynamics
Coordinates, displacement, velocity and acceleration
Simple harmonic motion
Time history representation
Complex exponential representation
Mass, stiffness and damping
Mass and inertia
Stiffness 0
Stiffness and flexibility matrices
Damping
Energy methods in structural dynamics
Rayleigh’s energy method
The principle of virtual work
Lagrange’s equations
Linear and non-linear systems
Systems of units
Absolute and gravitational systems
Conversion between systems
The SI system
References
Chapter The Linear Single Degree of Freedom System: Classical Methods
Setting up the differential equation of motion
Single degree of freedom system with force input
Single degree of freedom system with base motion input
Free response of single-DOF systemChapter
Forced response of the system by direct solution of the equation of motion
The Linear Single Degree of Freedom System: Response
in the Time Domain
Exact analytical methods
The Laplace transform method
The convolution or Duhamel integral 0
Listings of standard responses
‘Semi-analytical’ methods
Impulse response method
Straight-line approximation to input function
Superposition of standard responses
Step-by-step numerical methods using approximate derivatives
Euler method 0
Modified Euler method
Central difference method
The Runge–Kutta method
Discussion of the simpler finite difference methods
Dynamic factors 0
Dynamic factor for a square step input 0
Response spectra
Response spectrum for a rectangular pulse
Response spectrum for a sloping step
References
Chapter The Linear Single Degree of Freedom System: Response
in the Frequency Domain
Response of a single degree of freedom system with applied force
Response expressed as amplitude and phase
Complex response functions
Frequency response functions
Single-DOF system excited by base motion
Base excitation, relative response
Base excitation: absolute response
Force transmissibility
Excitation by a rotating unbalance
Displacement response
Force transmitted to supports
References
Chapter Damping
Viscous and hysteretic damping models
Damping as an energy loss 0
Energy loss per cycle – viscous model 0
Energy loss per cycle – hysteretic model 0
Graphical representation of energy loss 0
Specific damping capacity 0
Tests on damping materials
s by direct solution of the equation
Quantifying linear damping 0
Quality factor, Q 0
Logarithmic decrement 0
Number of cycles to half amplitude 0
Summary table for linear damping
Heat dissipated by damping
Non-linear damping
Coulomb damping
Square law damping
Equivalent linear dampers
Viscous equivalent for coulomb damping
Viscous equivalent for square law damping
Limit cycle oscillations with square-law damping
Variation of damping and natural frequency in structures with
amplitude and time
Chapter Introduction to Multi-degree-of-freedom Systems
Setting up the equations of motion for simple, undamped,
multi-DOF systems
Equations of motion from Newton’s second law
and d’Alembert’s principle 0
Equations of motion from the stiffness matrix 0
Equations of motion from Lagrange’s equations
Matrix methods for multi-DOF systems
Mass and stiffness matrices: global coordinates
Modal coordinates
Transformation from global to modal coordinates
Undamped normal modes
Introducing eigenvalues and eigenvectors
Damping in multi-DOF systems
The damping matrix
Damped and undamped modes
Damping inserted from measurements
Proportional damping
Response of multi-DOF systems by normal mode summation
Response of multi-DOF systems by direct integration
Fourth-order Runge–Kutta method for multi-DOF systems
Chapter Eigenvalues and Eigenvectors
The eigenvalue problem in standard form
The modal matrix
Some basic methods for calculating real eigenvalues and eigenvectors
Eigenvalues from the roots of the characteristic equation
and eigenvectors by Gaussian elimination
Matrix iteration
Jacobi diagonalization
Choleski factorization
More advanced methods for extracting real eigenvalues and eigenvectors
Complex (damped) eigenvalues and eigenvectors
References 0
Chapter Vibration of Structures
A historical view of structural dynamics methods
Continuous systems
Vibration of uniform beams in bending
The Rayleigh–Ritz method: classical and modern
Component mode methods
Component mode synthesis
The branch mode method 0
The finite element method
An overview
Equations of motion for individual elements
Symmetrical structures
References
Chapter Fourier Transformation and Related Topics
The Fourier series and its developments
Fourier series
Fourier coefficients in magnitude and phase form
The Fourier series in complex notation
The Fourier integral and Fourier transforms
The discrete Fourier transform
Derivation of the discrete Fourier transform
Proprietary DFT codes
The fast Fourier transform
Aliasing
Response of systems to periodic vibration 0
Response of a single-DOF system to a periodic input force
References
Chapter 0 Random Vibration
0 Stationarity, ergodicity, expected and average values
0 Amplitude probability distribution and density functions 0
0 The Gaussian or normal distribution
0 The power spectrum
0 Power spectrum of a periodic waveform
0 The power spectrum of a random waveform
0 Response of a system to a single random input
0 The frequency response function
0 Response power spectrum in terms of the input
power spectrum
0 Response of a single-DOF system to a broadband
random input
0 Response of a multi-DOF system to a single
broad-band random input
0 Correlation functions and cross-power spectral density functions
0 Statistical correlation
0 The autocorrelation function 00
0 The cross-correlation function 0
0 Relationships between correlation functions and power
spectral density functions 0
0 The response of structures to random inputs 0
0 The response of a structure to multiple random inputs 0
0 Measuring the dynamic properties of a structure 0
0 Computing power spectra and correlation functions using the discrete
Fourier transform 0
0 Computing spectral density functions
0 Computing correlation functions
0 Leakage and data windows
0 Accuracy of spectral estimates from random data
0 Fatigue due to random vibration 0
0 The Rayleigh distribution
0 The S–N diagram
References
Chapter Vibration Reduction
Vibration isolation
Isolation from high environmental vibration
Reducing the transmission of vibration forces
The dynamic absorber
The centrifugal pendulum dynamic absorber
The damped vibration absorber
The springless vibration absorber
References
Chapter Introduction to Self-Excited Systems
Friction-induced vibration
Small-amplitude behavior
Large-amplitude behavior
Friction-induced vibration in aircraft landing gear 0
Flutter
The bending-torsion flutter of a wing
Flutter equations
An aircraft flutter clearance program in practice 0
Landing gear shimmy
References
Chapter Vibration testing
Modal testing
Theoretical basis
Modal testing applied to an aircraft
Environmental vibration testing
Vibration inputs
Functional tests and endurance tests
Test control strategies
Vibration fatigue testing in real time
Vibration testing equipment
Accelerometers
Force transducers
Exciters
References
Appendix A A Short Table of Laplace Transforms
Appendix B Calculation of Flexibility Influence Coefficients
Appendix C Acoustic Spectra
Index
of motion
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عدل سابقا من قبل Admin في الإثنين 23 يونيو 2014, 1:18 pm عدل 2 مرات |
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Mustafa-Elkady
مهندس تحت الاختبار
عدد المساهمات : 25
التقييم : 29
تاريخ التسجيل : 15/11/2012
العمر : 50
الدولة : Egypt
العمل : Engineering
الجامعة : Ain Shams
| | موضوع: رد: كتاب Structural Dynamics and Vibration in Practice الجمعة 23 نوفمبر 2012, 1:26 pm | |
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Admin
مدير المنتدى
عدد المساهمات : 18956
التقييم : 35374
تاريخ التسجيل : 01/07/2009
الدولة : مصر
العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
| | موضوع: رد: كتاب Structural Dynamics and Vibration in Practice الجمعة 23 نوفمبر 2012, 1:30 pm | |
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- Mustafa-Elkady كتب:
- اخي الفاضل
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وسيتم تعديله على الفور إن شاء الله |
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Mustafa-Elkady
مهندس تحت الاختبار
عدد المساهمات : 25
التقييم : 29
تاريخ التسجيل : 15/11/2012
العمر : 50
الدولة : Egypt
العمل : Engineering
الجامعة : Ain Shams
| | موضوع: رد: كتاب Structural Dynamics and Vibration in Practice السبت 24 نوفمبر 2012, 11:11 am | |
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Admin
مدير المنتدى
عدد المساهمات : 18956
التقييم : 35374
تاريخ التسجيل : 01/07/2009
الدولة : مصر
العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
| | موضوع: رد: كتاب Structural Dynamics and Vibration in Practice السبت 24 نوفمبر 2012, 11:38 am | |
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- Mustafa-Elkady كتب:
- جزاك الله خيرا
جزانا الله وإياك خيراً |
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