Vibration Testing
Theory and Practice
2. Auflage Oktober 2008
672 Seiten, Hardcover
Wiley & Sons Ltd
Kurzbeschreibung
Vibration Testing: Theory and Practice, Second Edition is a step-by-step guide that shows how to obtain meaningful experimental results via the proper use of modern instrumentation, vibration exciters, and signal-processing equipment, with particular emphasis on how different types of signals are processed with a frequency analyzer. Thoroughly updated, this new edition covers all basic concepts and principles underlying dynamic testing, explains how current instruments and methods operate within the dynamic environment, and describes their behavior in a number of commonly encountered field and laboratory test situations.
Vibration Testing: Theory and Practice, Second Edition is a step-by-step guide that shows how to obtain meaningful experimental results via the proper use of modern instrumentation, vibration exciters, and signal-processing equipment, with particular emphasis on how different types of signals are processed with a frequency analyzer. Thoroughly updated, this new edition covers all basic concepts and principles underlying dynamic testing, explains how current instruments and methods operate within the dynamic environment, and describes their behavior in a number of commonly encountered field and laboratory test situations.
1.1 Introduction.
1.2 Preliminary Considerations.
1.3 General Input/Output Relationships in the Frequency Domain.
1.4 Overview of Equipment Employed.
1.5 Summary.
Chapter Two: Dynamic Signal Analysis.
2.1 Introduction.
2.2 Phasor Representation of Periodic Functions.
2.3 Periodic Time Histories.
2.4 Transient Signal Analysis.
2.5 Correlation Concepts - A Statistical Point of View.
2.6 Correlation Concepts - Periodic Time-Histories.
2.7 Correlation Concepts - Transient Time-Histories.
2.8 Correlation Concepts - Random Time Histories.
2.9 Summary.
2.10 General References on Signal Analysis.
References.
Chapter Three: Vibration Concepts.
3.1 Introduction.
3.2 The Single DOF Model.
3.3 Single Degree of Freedom Forced Response.
3.4 General Input-Output Model for Linear Systems.
3.5 The Two Degree of Freedom Vibration Model.
3.6 The Second Order Continuous Vibration Model.
3.7 Fourth Order Continuous Vibration System - The Beam.
3.8 Non-Linear Behavior.
3.9 Summary.
References.
Chapter Four: Transducer Measurement Considerations.
4.1 Introduction.
4.2 Fixed Reference Transducers.
4.3 Mechanical Model of Seismic Transducers - The Accelerometer.
4.4 Piezoelectric Sensor Characteristics.
4.5 Combined Linear and Angular Accelerometers.
4.6 Transducer Response to Transient Inputs.
4.7 Accelerometer Cross-Axis Sensitivity.
4.8 The Force Transducer General Model.
4.9 Correcting Frf Data For Force Transducer Mass Loading.
4.10 Calibration.
4.11 Environmental Factors.
4.12 Summary.
References.
Chapter Five: The Digital Frequency Analyzer.
5.1 Introduction.
5.2 Basic Processes of A Digital Frequency Analyzer.
5.3 Digital Analyzer Operating Principles.
5.4 Factors In The Application of a Single Channel Analyzer.
5.5 The Dual Channel Analyzer.
5.6 The Effects of Signal Noise on Frf Measurements.
5.7 Overlapping Signal Analysis to Reduce Analysis Time.
5.8 Zoom Analysis.
5.9 Scan Analysis, Scan Averaging, And More On Spectral Smearing.
5.10 Summary.
5.11 References.
Chapter Six: Vibration Excitation Mechanisms.
6.1 Introduction.
6.2 Mechanical Vibration Exciters.
6.3 Electrohydraulic Exciters.
6.4 The Modeling Of An Electro-Magnetic Vibration Exciter System.
6.5 An Exciter System's Bare Table Characteristics.
6.6 Interaction Of An Exciter And A Grounded Single Dof Structure.
6.7 Interaction Of An Exciter And An Ungrounded Structure Under Test.
6.8 Measuring an Exciters Actual Characteristics.
References.
Chapter Seven: The Application Of Basic Concepts To Vibration Testing.
7.1 Introduction.
7.2 Sudden Release Or Step Relaxation Method.
7.3 Forced Response Of A Simply Supported Beam Mounted On An Exciter.
7.4 Impulse Testing.
7.5 Selecting Proper Windows for Impulse Testing.
7.6 Vibration Exciter Driving A Free-Free Beam With Point Loads.
7.7 Windowing Effects On Random Test Results.
7.8 Low Frequency Damping Measurements Reveal Subtle Data Processing Problems.
7.9 A Linear Structure Becomes Non-Linear Due To Its Test Environment..
7.10 Summary.
References.
Chapter Eight: General Vibration Testing Model: From The Field To The Laboratory.
8.1 Introduction.
8.2 A Two Point Input-Output Model Of Field And Laboratory Simulation Environments.
8.3 Laboratory Simulation Schemes Based On The Elementary Model.
8.4 An Example Using A Two Dof Test Item And A Two DOF Vehicle.
8.5 The General Field Environment Model.
8.6 The General Laboratory Environment Model.
8.7 Test Scenarios for Laboratory Simulations.
8.8 Summary.
