Vibration Measurement and Analysis - 1st Edition - ISBN: 9780408041010, 9781483161631

Vibration Measurement and Analysis

1st Edition

Authors: J. D. Smith
eBook ISBN: 9781483161631
Imprint: Butterworth-Heinemann
Published Date: 5th April 1989
Page Count: 176
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Description

Vibration Measurement and Analysis presents the different approaches of vibration measurement and analysis techniques.

The book begins with a discussion of the reasons for conducting vibration measurements. Subsequent chapters cover topics on general measurement requirements, transducers and the measurement of sound, and signal conditioning and recording. Analysis methods and frequency analysis, techniques of correlation and averaging, and automation of vibration testing are discussed as well.

Mechanical engineers will find the book very useful.

Table of Contents


Preface

1 Introduction

1.1 Reasons for Measurement

1.2 Single Degree of Freedom Systems

1.3 Two Degrees of Freedom

2 General Measurement Requirements

2.1 The Measurement Chain

2.2 Transducer Criteria

2.3 Linearity and Discrimination

2.4 Frequency Range

2.5 Cross-Axis Sensitivity

2.6 Electrical Impedance Matching

2.7 Mechanical Matching

2.8 Conditioning

2.9 Viewing or Recording

2.10 Signal to Noise Ratio

3 Types of Transducer

3.1 Classification

3.2 Contact Relative Transducers for Displacement

3.3 Relative Velocity Contact Transducers

3.4 Strain Gauges

3.5 Non-Contact Relative Displacement Transducers

3.6 Doppler Types

3.7 Interferometer Methods

3.8 Seismic Systems

3.9 Accelerometers

3.10 Resistive Accelerometers

3.11 Accelerometer Calibration

3.12 Choice

4 Measurement of Sound

4.1 Introduction

4.2 Scales

4.3 Measurement

4.4 Effects of Sound Fields

4.5 Sound Intensity

5 Digital Measurement Systems

5.1 Introduction

5.2 Fringe Counting Systems

5.3 Laser and Electrical Systems

5.4 T.E. Measurement

5.5 Torsional Vibration

5.6 Torsional Comparisons

6 Signal Conditioning

6.1 Operational Amplifiers

6.2 Sealers, Buffers and Integrators

6.3 Filters and Differentiators

6.4 Low Impedance and Charge Amplifiers

6.5 Displacement, Velocity, Acceleration or Jerk

6.6 Bridge Systems

6.7 Phase Sensitive Detectors

6.8 Enveloping

7 Recording

7.1 Direct Writing Systems

7.2 Tape Recording

7.3 Transient Recording

7.4 Digital Recording

7.5 Pre-Processing

7.6 Method Selection

7.7 Aliasing and Sampling

8 Vibration Excitation

8.1 Introduction

8.2 Methods Available

8.3 Relative Advantages

8.4 Mass Compensation

8.5 Machine Excitation

8.6 Waterfall Displays

8.7 Reciprocal Theorem

8.8 Model Testing

8.9 Sweep, Random, Chirp and Impulse

9 Analysis Methods and Frequency Analysis

9.1 Introduction

9.2 The Raw Vibration

9.3 Frequency Analysis

9.4 The Two Types of Spectrum, Conversions

9.5 Bandwidth and Power

9.6 Choice of Bandwidth

9.7 Methods of Obtaining Spectra

9.8 Windows and Limiting Bandwidth

9.9 Repetitive Waveforms

9.10 Incorrect Amplitudes at Borderlines

9.11 The Importance of Phase Information

10 Modulation

10.1 Mechanisms of Carrier Modulation

10.2 Relevance for Testing

10.3 Cepstrum

10.4 Deductions From Modulation

10.5 Random Disturbances

11 Correlation and Averaging

11.1 Introduction

11.2 Autocorrelation

11.3 Correlation

11.4 Time Averaging

11.5 Jitter

11.6 Controlled Sampling

11.7 Average or Variation

12 Transfer Functions

12.1 Time or Frequency

12.2 Coherence

12.3 Transmissibility

12.4 Identifying Resonances

12.5 Modeshapes

12.6 Modal Analysis

13 Signal Filtering and Improvement

13.1 Uses of Filtering

13.2 Filter Order

13.3 Compromises in Selection

13.4 Analogue or Digital

13.5 Bandpass or Resonant Filter

13.6 Bursts of Vibration

13.7 The Hilbert Transform

13.8 Line Elimination and Signal Regeneration

14 Condition Monitoring

14.1 The Problem

14.2 Frequency Analysis

14.3 Crest Factor and Kurtosis

14.4 Impulse Detection

14.5 Averaging

14.6 Line Elimination

15 Shock Testing

15.1 Introduction

15.2 Large Loads

15.3 High Accelerations

15.4 Measurement

16 Automation of Testing

16.1 Introduction

16.2 Relative Speed

16.3 Mode Shapes

16.4 Economics

16.5 Training

16.6 Non-Linearities

References

Bibliography

Index

Details

No. of pages:
176
Language:
English
Copyright:
© Butterworth-Heinemann 1989
Published:
Imprint:
Butterworth-Heinemann
eBook ISBN:
9781483161631

About the Author

J. D. Smith

Ratings and Reviews