Vibration Problems in Machines: Diagnosis and Resolution, 2nd Edition (Hardback) book cover

Vibration Problems in Machines

Diagnosis and Resolution, 2nd Edition

By Arthur W. Lees

CRC Press

384 pages | 126 B/W Illus.

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Hardback: 9780367367749
pub: 2020-06-30
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Description

This book explains how to infer information about the internal operations of rotating machines from external measurements through methods used to resolve practical plant problems. Second edition includes summary of instrumentation, methods for establishing machine rundown data, relationship between the rundown curves and the ideal frequency response function. The section on balancing has been expanded and examples are given on the strategies for balancing a rotor with a bend, with new section on instabilities. It includes case studies with real plant data, MATLAB® scripts and functions for the modelling and analysis of rotating machines. Book is aimed at students and researchers in mechanical engineering including structural vibration, machine design, condition monitoring and Explores modern ideas on signal processing and instrumentation and necessary rotor dynamic theory in one volume Consolidates machine vibration analysis, measurement and interpretation Covers realistic plant operation procedures Includes basic discussion of the effects of faults Discusses real plant examples using Matlab toolbox supported by lecture slides

Table of Contents

1. Introduction

1.1 Monitoring and Diagnosis

1.2 Instrumentation

1.3 Mathematical Models

1.4 Machine Classification

1.5 Considerations for a Monitoring Scheme

1.6 Outline of Text

1.7 Software

1.8 References

2 Data presentation

2.1 Introduction

2.2 Presentation Formats

2.3 Comparison with Calculations

2.4 Detection and Diagnosis Process

2.5 Concluding Remarks

2.6 Problems

2.7 References

3 Modelling and Analysis

3.1 Introduction

3.2 Need for models

3.3 Modelling Approaches

3.4 Analysis methods

3.5 Further Modelling Considerations

3.6 Summary

3.7 Problems

3.8 References

4 Faults in Machines (1)

4.1 Introduction

4.2 Definitions: Rigid and flexible rotors

4.3 Mass Imbalance

4.4 Rotor bends

4.5 Concluding Remarks

4.6 Problems

4.7 References

5 Faults in Machines (2)

5.1 Introduction

5.2 Misalignment

5.3 Cracked Rotors

5.4 Torsional Excitation

5.5 Non-linearity

5.6 Instability

5.7 Interactions and Diagnostics

5.8 Closing Remarks

5.9 Problems

5.10 References

6. Rotor-Stator Interaction

6.1 Introduction

6.2 Interaction through Bearings

6.3 Interaction via Working Fluid

6.4 Direct Stator Contact

6.5 The Morton Effect

6.6 Harmonics on Contact

6.7 Concluding Remarks

6.8 Problems

6.9 References

7. Machine Identification

7.1 Introduction

7.2 Current State of Modelling

7.3 Primary Components

7.4 Sources of error/uncertainty

7.5 Model Improvement

7.6 Application to Foundations

7.7 Imbalance Identification

7.8 Extension to Alignment

7.9 Future Options

7.10 Concluding remarks

7.11 Problems

7.12 References

8. Some Further Analysis Methods

8.1 Introduction

8.2 Standard Approaches

8.3 Artificial Neural Networks

8.4 Merging ANNs with Physics Based Models

8.5 Singular Value Decomposition

8.6 Other Useful Techniques

8.7 Concluding Remarks

8.8 Problems

8.9 References

9. Case Studies

9.1 Introduction

9.2 A Crack in a Large Alternator Rotor

9.3 Workshop Modal Testing of a Cracked Rotor

9.4 Gearbox Problems on a Large Boiler Feed Pump

9.5 Vibration of Large Centrifugal Fan Units

9.6 Low-pressure Turbine Instabilities

9.7 Concluding Remarks

9.8 Problems

9.9 References

10. Overview and Outlook

10.1 Progress in Instrumentation

10.2 Progress in Data Analysis and Handling

10.3 Progress in Modelling

10.4 Expert Systems

10.5 Future Prospects

10.6 Summary

10.7 References

About the Author

Professor Arthur W. Lees graduated in Physics and remained Manchester University for three years research. After completing his PhD , he joined the Central Electricity Generating Board, initially developing Finite Element codes then later resolving plant problems. After a sequence of positions he was appointed head of the Turbine Group for Nuclear Electric Plc. He moved to Swansea University in 1995 and has been active in both research and teaching. He is a regular reviewer of many technical journals and was, until his recent retirement, on the editorial boards of the Journal of Sound & Vibration and Communications on Numerical Methods in Engineering. His research interests include structural dynamics, rotor dynamics, inverse problems and heat transfer. Professor Lees is a Fellow of the Institution of Mechanical Engineers and a Fellow of the Institute of Physics, a Chartered Engineer and a Chartered Physicist. He was a member of Council of the Institute of Physics, 2001-5. He is now Professor Emeritus at Swansea University, but remains an active researcher.

Subject Categories

BISAC Subject Codes/Headings:
SCI041000
SCIENCE / Mechanics / General
TEC009020
TECHNOLOGY & ENGINEERING / Civil / General
TEC009070
TECHNOLOGY & ENGINEERING / Mechanical
TEC016000
TECHNOLOGY & ENGINEERING / Industrial Design / General