Vibration Problems in Machines: Diagnosis and Resolution

Vibration Problems in Machines: Diagnosis and Resolution explains how to infer information about the internal operations of rotating machines from external measurements. In doing so, the book examines the vibration signals arising under various fault conditions, such as rotor imbalance, misalignment, cracked rotors, gear wear, whirling instabilities, and other problems. Covering a wide range of techniques required in the monitoring, analysis, and diagnosis of operational rotating machinery, this text: Discusses topics ranging from the presentation of complex data to methods for reconciling model and plant data Describes the physical basis of fault signals as well as the necessary signal and data processing techniques Delivers fresh insight into misalignment phenomena and the future of smart machinery Vibration Problems in Machines: Diagnosis and Resolution includes case studies with real plant data, MATLAB® scripts and functions for the modelling and analysis of rotating machines, end-of-chapter questions, and a solutions manual with qualifying course adoption. The book provides an invaluable resource for those seeking to optimize the use of complex and often apparently contradictory data.

Table of Contents:
Introduction Monitoring and Diagnosis Mathematical Models Machine Classification Considerations for a Monitoring Scheme Outline of the Text Software References Data Presentation Introduction Presentation Formats Comparison with Calculations Detection and Diagnosis Process Problems References Modelling and Analysis Introduction Need for Models Modelling Approaches Analysis Methods Further Modelling Considerations Summary Problems References Faults in Machines – Part 1 Introduction Definitions: Rigid and Flexible Rotors Mass Imbalance Rotor Bends Concluding Remarks Problems References Faults in Machines – Part 2 Introduction Misalignment Cracked Rotors Torsion Non-Linearity Interactions and Diagnostics Closing Remarks Problems References Rotor–Stator Interaction Introduction Interaction through Bearings Interaction via Working Fluid Direct Stator Contact The Morton Effect Harmonics of Contact Concluding Remarks Problems References Machine Identification Introduction Current State of Modelling Primary Components Sources of Error/Uncertainty Model Improvement Application to Foundations Imbalance Identification Extension to Misalignment Future Options Problems References Some Further Analysis Methods Standard Approaches Artificial Neural Networks Merging ANNs with Physics-Based Models Kernel Density Estimation Rapid Transients: Vold–Kalman Method Useful Techniques Concluding Remarks Problems References Case Studies Introduction Crack in a Large Alternator Rotor Workshop Modal Testing of a Cracked Rotor Gearbox Problems on a Boiler Feed Pump Vibration of Large Centrifugal Fans Low-Pressure Turbine Instabilities Concluding Remarks Problems References Overview and Outlook Progress in Instrumentation Progress in Data Analysis and Handling Progress in Modelling Expert Systems Future Prospects Summary References

About the Author :
Arthur W. Lees, BSc, PhD, DSc, CEng, CPhys, FIMechE, FInstP, LRPS, joined the Central Electricity Generating Board, London, UK, after completing his PhD. Following a sequence of positions, he was appointed head of the Turbine Group for Nuclear Electric Plc, UK. In 1995, he moved to Swansea University, UK, where he is currently professor emeritus. An active researcher, Professor Lees is a regular reviewer of many technical journals, a fellow of the Institution of Mechanical Engineers and the Institute of Physics, and a chartered engineer and physicist. He has served on the editorial boards of the Journal of Sound and Vibration and Communications in Numerical Methods in Engineering, and was a member of the Council of the Institute of Physics, 2001–2005.

Review :
"The main strength of the book material is a nice blend of practical and theoretical aspects of the subject. The subject of dynamics of rotating machinery is known to evolve from the practice in the field. This book gives that flavour. Rotating machinery runs for longer periods and is bound to have faults during its operation. The information in this book definitely enhances the capabilities of practice engineers and researchers in this field." —Dr. Rajiv Tiwari, Indian Institute of Technology Guwahati "... provides comprehensive coverage of vibration in rotating machinery supported by modeling and computational examples." —Jerzy T. Sawicki, Cleveland State University, Ohio, USA "I very much enjoyed this book by Lees and found it to offer useful practical theories, techniques, and approaches to diagnosing and resolving vibration problems in rotating machines in an easy-to-read and instructive manner. Because of its interesting combined theoretical and practical approach, the book should be helpful and informative to a broad spectrum of practitioners and researchers interested in examining and solving undesirable vibration levels occurring within rotating machinery." —Noise News International, March 2017 Issue