| |
| |
| |
Equations of Motion for Discrete Systems | |
| |
| |
| |
The Study of Vibrations: An Overview | |
| |
| |
| |
System Elements | |
| |
| |
| |
Generalized Coordinates | |
| |
| |
| |
Newton-Euler Motion Equations | |
| |
| |
| |
Power Balance Method for Time-Invariant Systems | |
| |
| |
| |
Power Balance Law | |
| |
| |
| |
Linearized Energy and Power | |
| |
| |
| |
Linearized Equations of Motion | |
| |
| |
| |
Implementation | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Transient Response of One-Degree-of-Freedom System | |
| |
| |
| |
Harmonic Functions | |
| |
| |
| |
Basic Properties | |
| |
| |
| |
Complex Variable Representation | |
| |
| |
| |
Algebraic Operations | |
| |
| |
| |
Free Vibration | |
| |
| |
| |
Undamped Systems | |
| |
| |
| |
Underdamped Systems | |
| |
| |
| |
Overdamped Systems | |
| |
| |
| |
Critically Damped Systems | |
| |
| |
| |
Coulomb Friction | |
| |
| |
| |
Transient Response to Basic Excitations | |
| |
| |
| |
Method of Undetermined Coefficients | |
| |
| |
| |
Superposition and Time Delay | |
| |
| |
| |
Pulse Excitation | |
| |
| |
| |
Step and Impulse Responses | |
| |
| |
| |
Shock Spectra | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Steady-State Response to Harmonic Excitation | |
| |
| |
| |
Complex Frequency Response | |
| |
| |
| |
Power Dissipation | |
| |
| |
| |
Quality Factor of Resonance | |
| |
| |
| |
Structural Damping | |
| |
| |
| |
Resonant Response | |
| |
| |
| |
Rotating Imbalance | |
| |
| |
| |
Basic Model | |
| |
| |
| |
Frequency Response | |
| |
| |
| |
Whirling of Shafts | |
| |
| |
| |
Force Transmission | |
| |
| |
| |
Periodic Excitations | |
| |
| |
| |
Complex Fourier Series | |
| |
| |
| |
The Discrete Fourier Transform | |
| |
| |
| |
The Inverse Discrete Fourier Transform | |
| |
| |
| |
Explanation and Implementation of the FFT Algorithm | |
| |
| |
| |
Periodic Response Using FFTs | |
| |
| |
| |
Accelerometers and Seismometers | |
| |
| |
| |
Transient Response Revisited | |
| |
| |
| |
Convolution Integral | |
| |
| |
| |
FFTs for Transient Response | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Modal Analysis of Multi-Degree-of-Freedom Systems | |
| |
| |
| |
Background | |
| |
| |
| |
Eigenvalue Problem--Undamped Systems | |
| |
| |
| |
Natural Frequencies and Modes | |
| |
| |
| |
Orthogonality and Normalization | |
| |
| |
| |
Computerized Implementations | |
| |
| |
| |
Flexibility Coefficients | |
| |
| |
| |
Repeated Natural Frequencies | |
| |
| |
| |
Rigid Body Modes | |
| |
| |
| |
Modal Equations | |
| |
| |
| |
Coordinate Transformations | |
| |
| |
| |
Modal Coordinates | |
| |
| |
| |
Modal Coordinate Description of Mechanical Energy and Power | |
| |
| |
| |
Free Vibration Response | |
| |
| |
| |
Forced Response | |
| |
| |
| |
Modal Damping | |
| |
| |
| |
Harmonic Steady-State Response | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Harmonic Excitation of Multi-Degree-of-Freedom Systems | |
| |
| |
| |
Frequency Domain Transfer Function | |
| |
| |
| |
Structural Damping and Modal Analysis | |
| |
| |
| |
Vibration Absorber | |
| |
| |
| |
FFT Techniques | |
| |
| |
| |
Analysis of Transient Response | |
| |
| |
| |
Experimental Modal Analysis | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Vibration of Elastic Bars: the Ritz Method and the Rayleigh Ratio | |
| |
| |
| |
Equations of Motion | |
| |
| |
| |
Axial Displacement | |
| |
| |
| |
Torsion of Circular Bars | |
| |
| |
| |
Flexural Displacement | |
| |
| |
| |
Implementation and Solution | |
| |
| |
| |
Eigensolutions | |
| |
| |
| |
Modal Analysis | |
| |
| |
| |
Orthogonality of the Mode Functions | |
| |
| |
| |
Modal Response | |
| |
| |
| |
Initial Conditions: The Expansion Theorem | |
| |
| |
| |
Free Vibration | |
| |
| |
| |
Impulse Response | |
| |
| |
| |
Harmonic Steady-State Response | |
| |
| |
| |
Rayleigh Ratio and Convergence Properties | |
| |
| |
| |
Time-Dependent Boundary Conditions | |
| |
| |
| |
Ritz Method for Discrete Systems | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Field Descriptions for Vibrating Bars | |
| |
| |
| |
Derivation of Motion Equations | |
| |
| |
| |
Field Equations | |
| |
| |
| |
Boundary Conditions | |
| |
| |
| |
Eigensolutions for Extension and Torsion | |
| |
| |
| |
Eigensolution for Flexure | |
| |
| |
| |
Wave Interpretation of Modes and High-Frequency Asymptotics | |
| |
| |
| |
Symmetry and Mode Functions | |
| |
| |
| |
Orthogonality | |
| |
| |
| |
Modal Analysis of Response | |
| |
| |
| |
Modal Equations | |
| |
| |
| |
Steady-State and Transient Response | |
| |
| |
| |
Time-Dependent Boundary Conditions | |
| |
| |
| |
Mindlin-Goodman Decomposition | |
| |
| |
| |
Harmonic Boundary Excitation Wave Solution | |
| |
| |
| |
Timoshenko Beam Theory | |
| |
| |
| |
Field Equations | |
| |
| |
| |
Wave Solutions | |
| |
| |
| |
Modal Analysis | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
The Finite Element Method | |
| |
| |
| |
Interpolating Functions | |
| |
| |
| |
Elemental Matrices | |
| |
| |
| |
Conversion to Global Coordinates | |
| |
| |
| |
Assembly of the Elements | |
| |
| |
| |
Reaction Forces and Constraint Conditions | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Substructuring Concepts | |
| |
| |
| |
Method of Lagrange Multipliers | |
| |
| |
| |
Constraint Equations and Reactions | |
| |
| |
| |
Synthesis of the Equations of Motion | |
| |
| |
| |
Solution Methods | |
| |
| |
| |
Component Mode Synthesis | |
| |
| |
| |
Relaxation of Constraints | |
| |
| |
| |
Component Properties | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Damped Modal Analysis: the State Space | |
| |
| |
| |
State-Space Equations | |
| |
| |
| |
Eigenvalue Problem | |
| |
| |
| |
Relation to Previous Developments | |
| |
| |
| |
Orthogonality | |
| |
| |
| |
Modal Coordinates | |
| |
| |
| |
Free Vibration | |
| |
| |
| |
Impulsive Forces | |
| |
| |
| |
Steady-State Harmonic Vibration | |
| |
| |
| |
Rigid Body Motion | |
| |
| |
| |
Closure | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Modal Analysis of Gyroscopic Systems | |
| |
| |
| |
General Linearized Equations of Motion | |
| |
| |
| |
Right and Left Eigenvalue Problems | |
| |
| |
| |
Dynamic Stability | |
| |
| |
| |
Bi-orthogonality and Modal Equations of Motion | |
| |
| |
| |
Moving Continuous Systems | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Introduction to Rotordynamics | |
| |
| |
| |
Elements of a Rotordynamic Model | |
| |
| |
| |
Effects of Internal and External Damping | |
| |
| |
| |
Flexible Orthotropic Bearings | |
| |
| |
| |
Gyroscopic Effects | |
| |
| |
| |
Flexible Orthotropic Shafts | |
| |
| |
References and Selected Readings | |
| |
| |
Exercises | |
| |
| |
| |
Lagrange's Equations | |
| |
| |
| |
Transient Responses for Underdamped One-Degree-of-Freedom Systems | |
| |
| |
| |
Deformation Modes for Uniform Bars | |
| |
| |
Index | |