Gatti Applied Structural and Mechanical Vibrations

Theory and Methods, Second Edition
2. Auflage 2014
ISBN: 978-1-4822-5728-1
Verlag: Taylor & Francis
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 668 Seiten

The second edition of Applied Structural and Mechanical Vibrations: Theory and Methods continues the first edition’s dual focus on the mathematical theory and the practical aspects of engineering vibrations measurement and analysis. This book emphasises the physical concepts, brings together theory and practice, and includes a number of worked-out examples of varying difficulty and an extensive list of references.

What’s New in the Second Edition:

- Adds new material on response spectra

- Includes revised chapters on modal analysis and on probability and statistics

- Introduces new material on stochastic processes and random vibrations

The book explores the theory and methods of engineering vibrations. By also addressing the measurement and analysis of vibrations in real-world applications, it provides and explains the fundamental concepts that form the common background of disciplines such as structural dynamics, mechanical, aerospace, automotive, earthquake, and civil engineering. Applied Structural and Mechanical Vibrations: Theory and Methods presents the material in order of increasing complexity. It introduces the simplest physical systems capable of vibratory motion in the fundamental chapters, and then moves on to a detailed study of the free and forced vibration response of more complex systems. It also explains some of the most important approximate methods and experimental techniques used to model and analyze these systems.

With respect to the first edition, all the material has been revised and updated, making it a superb reference for advanced students and professionals working in the field.

Zielgruppe

Senior undergraduates, graduates, researchers and professionals, universities and laboratories involved in vibration measurements and analysis.

Autoren/Hrsg.

Gatti, Paolo L.

Fachgebiete

• Technische Wissenschaften Maschinenbau | Werkstoffkunde Maschinenbau
• Geisteswissenschaften Architektur Gestaltung, Darstellung, Bautechnik
• Technische Wissenschaften Bauingenieurwesen Konstruktiver Ingenieurbau, Baustatik

Inhaltsverzeichnis

Review of some fundamentals

Introduction

The role of modelling (linear and nonlinear, discrete and continuous systems, deterministic and random data)

Some definitions and methods

Springs, dampers and masses

Summary and comments

Mathematical preliminaries

Introduction

Fourier series and Fourier transform

Laplace transform

Dirac delta and related topics

The notion of Hilbert space

Analytical mechanics: An overview

Introduction

Systems of material particles

The principle of virtual work and d’Alembert’s principle: Lagrange’s and Hamilton’s equations

Lagrange’s equations: Fundamental properties, some generalisations and complements

Hamilton’s principle

Small-amplitude oscillations

Single degree of freedom systems

Introduction

Harmonic oscillator I: Free vibration

Harmonic oscillator II: Forced vibration

Damping in real systems, equivalent viscous damping

Summary and comments

More SDOF systems: Shock response, transient response and some approximate methods

Introduction

Time domain: Impulse response function and Duhamel integral

Frequency and Laplace domains: Frequency response function and transfer function

Generalised SDOF systems

Rayleigh (energy) method and improved Rayleigh method

Summary and comments

Multiple degrees of freedom (MDOF) systems

Introduction

A simple undamped -DOF system: Free vibration

Undamped n-DOF systems: Free vibration

Eigenvalues and eigenvectors sensitivity analysis

A few considerations on the structure and properties of the matrices M, K and C

Unrestrained systems: Rigid-body modes

Damped systems: Proportional and nonproportional damping

Generalised and complex eigenvalue problems: Reduction to standard form

Summary and comments

More MDOF systems: Forced vibration and response analysis

Introduction

Mode superposition

Harmonic excitation: Proportional viscous damping

Time-domain and frequency-domain response

Systems with rigid-body modes

The case of nonproportional viscous damping

MDOF systems with hysteretic damping

A few remarks on other solution strategies: Laplace transform and direct integration

Frequency response functions of a -DOF system

Summary and comments

Continuous systems

Introduction

The flexible string in transverse motion

Free vibration of a finite string: Standing waves and normal modes

Axial and torsional vibrations of rods

Flexural (bending) vibrations of beams

A two-dimensional continuous system: The flexible membrane

The differential eigenvalue problem

Bending vibrations of thin plates

Forced vibration and response analysis: The modal approach

Some final considerations: Alternative form of FRFs and the introduction of damping

Summary and comments

MDOF and continuous systems: Approximate methods

Introduction

The rayleigh quotient

The Rayleigh–Ritz method

Summary and comments

Experimental modal analysis

Introduction

Experimental modal analysis: Overview of the fundamentals

Modal testing procedures

A few selected topics in experimental modal analysis

Summary and comments

Probability and statistics: Preliminaries to random vibrations

Introduction

On the concept of probability

Probability: Axiomatic formulation and some results

Random variables and distribution functions

Random vectors

More on conditional probability

Convergences and the law of large numbers

A few remarks on probability and statistics

Stochastic processes and random vibrations

Introduction

The concept of random process

Basic calculus of random processes

Spectral representation of random processes

Response of linear systems to random excitation

Stationary narrowband processes: A few selected topics

Summary and comments

Appendices

References

Index

Über Autor(innen)

Paolo L. Gatti graduated in nuclear physics from the State University of Milano (Italy) and worked for 12 years for a private engineering company, where he became head of the vibration testing and data acquisition department. Since 2000, he has worked as an independent consultant in mechanical and structural vibrations, acoustics, and statistical analyses of experimental data. In these fields of activity, he is also an accredited technical consultant for the Court of Justice of Milan. He is also the author of Probability Theory and Mathematical Statistics for Engineers, published by Spon Press (Taylor & Francis Group) in 2005.