3.4.4. Exercise 4: damped system with a single excited mode 128
3.4.5. Exercise 5: system excited by the base 137
Chapter 4. Modal Analysis of N Degrees of Freedom 145
4.1. Introduction 145
4.1.1. Normal modes 145
4.2. Response in the frequency domain of a conservative structure subjected to a harmonic excitation 146
4.3. Response of a structure with proportional viscous damping to a harmonic excitation 150
4.4. Frequency response of a structure with proportional hysteretic damping 153
4.5. Exercises 155
4.5.1. Exercise 1: receptance matrix of a conservative structure 155
4.5.2. Exercise 2: receptance matrix of a structure with proportional viscous damping 164
4.5.3. Exercise 3: case of a non-diagonal mass matrix 170
References 177
Index 179
The final volume in the Non-deformable Solid Mechanics set, Movement Equations 5 deals with the dynamics of sets of solids. This volume provides the appropriate mathematical tools (torsor calculus and matrix calculus) to obtain and solve the equations of motion for a chain of solids. These equations are then used to acquire the information necessary for the design of mechanical systems. Also examined are the vibratory behavior of continuous (deformable) systems, rigid and deformable solids, and sets of several solids. The book concludes with a study of the response of an excited system as a function of the excitation frequency. Accompanied by detailed examples, this book is aimed primarily at students, but would also serve as a valuable support for working engineers and teacher-researchers.
About the Author Georges Vénizélos is a former Professor at the Conservatoire National des Arts et Métiers (CNAM), Paris, France, where he occupied the chair of mechanical systems design. Over his 35-year career at CNAM, he taught extensively and pursued research in the fields of solid mechanics and structural vibration. Abdelkhalak El Hami is Full Professor at INSA Rouen Normandy, France. He is the Director of the Department of Mechanics and responsible for the Chair of Mechanics at CNAM in Normandy, as well as several European educational projects.