Rotor Systems: Analysis and Identification

The purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently, the modern analysis methods for real life rotor systems. This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring and, fault diagnostics and prognostics. The book starts with introductory material for finite element methods and moves to linear and non-linear vibrations, continuous systems, vibration measurement techniques, signal processing and error analysis, general identification techniques in engineering systems, and MATLAB analysis of simple rotors. Key Features: • Covers both transfer matrix methods (TMM) and finite element methods (FEM) • Discusses transverse and torsional vibrations • Includes worked examples with simplicity of mathematical background and a modern numerical method approach • Explores the concepts of instability analysis and dynamic balancing • Provides a basic understanding of rotor dynamics phenomena with the help of simple rotor models including modern analysis methods for real life rotor systems. CHAPTER 1 A BRIEF HISTORY OF ROTOR DYNAMICS AND RECENT TRENDS 1.1 From the Rankine to Jeffcott Rotor Models 1.2 Rotor Dynamics Phenomena Studies from Stodola to Lund 1.3 Development of Rotor Dynamics Analysis Tools 1.4 Software for Rotor Dynamics Analysis 1.5 Dynamic Balancing of Rotors 1.6 Condition Monitoring of Rotating Machineries 1.7 Conferences on Rotordynamics 1.8 Concluding Remarks Exercise Problems References CHAPTER 2 ANALYSIS OF SIMPLE ROTOR SYSTEMS 2.1 Single-DOF Undamped Rotor Model 2.2 A Single-DOF Damped Rotor Model 2.3 Rankine Rotor Model 2.4 Jeffcott Rotor Model 2.5 A Jeffcott Rotor Model with an Offset Disc 2.6 Suppression of Critical Speeds Concluding Remarks Exercise Problems References CHAPTER 3 ROTORDYNAMIC PARAMETERS OF BEARINGS, SEALS AND DAMPERS 3.1 Rolling Element Bearings 3.2 Hydrodynamic Fluid-Lubricated Journal Bearings 3.3 Dynamic Seals 3.4 Squeeze-Film Dampers Concluding remarks Exercise Problems References CHAPTER 4 TRANSVERSE VIBRATIONS-II: SIMPLE ROTOR-BEARING-FOUNDATION SYSTEMS 4.1 Symmetrical Long Rigid Shaft on Flexible Anisotropic Bearings 4.2 A Symmetrical Long Rigid Shaft on Anisotropic Bearings 4.3 A Symmetrical Flexible Shaft on Anisotropic Bearings 4.4 A Rotor on Flexible Bearings and Foundations 4.5 A Turbine-Coupling-Generator Rotor on Flexible Bearings Con