
Structural Dynamics of Turbo-machines.
Title:
Structural Dynamics of Turbo-machines.
Author:
Rangwala, A.S.
ISBN:
9788122426243
Personal Author:
Edition:
1st ed.
Physical Description:
1 online resource (447 pages)
Contents:
Cover -- Preface -- Introduction -- Contents -- Part-I : Component Dynamics, Life Cycle Evaluation -- Chapter 1. Vibration Theory Fundamentals -- 1.1 Introduction -- 1.2 Vector Method of Representing Dynamic Motion -- 1.3 Complex Numbers Method -- 1.4 Free Vibrations Without Damping -- 1.5 Torsional Pendulum -- 1.6 Free Vibrations with Viscous Damping -- 1.7 Forced Vibrations Without Damping -- 1.8 Forced Vibrations with Viscous Damping -- 1.9 Vibrations Due to Rotating Eccentric Weight -- 1.10 Vibration Isolation -- 1.11 Cantilever Beam Attached to Wheel -- 1.12 Beam Subjected to Centrifugal Force -- 1.13 Flexibly Mounted Beam -- 1.14 Row of Connected Beams -- 1.15 Energy Methods in Shell Vibration -- 1.16 Vibration in Circular Disk -- 1.17 Coupled Disk-Blade System -- 1.18 Example Problems -- References & Bibliography -- Chapter 2. Fan and Compressor Airfoils -- 2.1 Introduction -- 2.2 Finite Element Method in Blade Vibrations -- 2.3 Individual Blade Vibration -- 2.4 Blade Flutter -- 2.5 Cascade Flutter Analysis -- 2.6 Prediction of Forced Response -- 2.7 Aspects of Bladed Disk Assembly Dynamics -- 2.8 Propeller Blade Separation Incident -- 2.9 Acoustic Resonance in Multi-Stage Compressor -- 2.10 Whirl Inducing Forces in Axial Compressor -- 2.11 Example Problems -- References & Bibliography -- Chapter 3. Turbine and Combustor Parts -- 3.1 Introduction -- 3.2 Integrity Evaluation of Turbine Blade -- 3.3 Response Due to Blade-Vane Interaction -- 3.4 Periodic Response of Shrouded Blades -- 3.5 Cyclically Symmetric Structures -- 3.6 Random Blade Mistuning -- 3.7 Cumulative Damage Theory in Life Prediction -- 3.8 Acoustic Resonance in Combustor -- 3.9 Active Combustion Instability Control -- 3.10 Structural Design of Combustor Liner for Dynamic Pressure -- 3.11 Example Problems -- References & Bibliography.
Chapter 4. Bearing and Seal Characteristics -- 4.1 Introduction -- 4.2 Fluid Film Bearing -- 4.3 Journal Bearing Types -- 4.4 Dynamic Characteristics -- 4.5 Rolling Element Bearing -- 4.6 Tip Clearance Actuation with Magnetic Bearings -- 4.7 Impact of Flexible Support -- 4.8 Labyrinth and Honeycomb Seal Evaluation -- 4.9 Damping Seal Dynamic Characteristics -- 4.10 Squeeze Film Damper -- 4.11 Example Problems -- References & Bibliography -- Part-II : Structural and Operational Analysis of Engine System -- Chapter 5. Shaft Torsional Vibration -- 5.1 Introduction -- 5.2 Simple Two-Inertia System -- 5.3 Energy Balance Method -- 5.4 Matrix Method -- 5.5 Finite Element Method -- 5.6 Geared and Branched Systems -- 5.7 Critical Speeds and Modes -- 5.8 Resonant Response -- 5.9 Dynamic Vibrations Absorbers -- 5.10 Torsional Dampers -- 5.11 Permissible Amplitudes -- 5.12 Shifting of Critical Speeds -- 5.13 Example Problems -- References & Bibliography -- Chapter 6. Flexural Rotor Dynamics -- 6.1 Introduction -- 6.2 Dynamics of Shaft Motion -- 6.3 Support Flexibility and Critical Speeds -- 6.4 Procedure for Critical Speeds -- 6.5 Critical Speed Positioning -- 6.6 Synchronous Response -- 6.7 Component Mode Synthesis of Large Systems -- 6.8 Rotor Supported in Flexible Casing -- 6.9 Dry Friction Rubbing Between Rotor and Seal -- 6.10 Stability Considerations -- 6.11 Self-Excited Vibrations -- 6.12 Periodic System Characteristics -- 6.13 Methods to Alleviate Vibration Instability -- 6.14 Rotor Dynamic Design of High Pressure Compressor -- 6.15 Effect of Squeeze Film Damper on Rotor Response and Stability -- 6.16 Full Load Testing for Rotor Dynamics Improvement -- 6.17 LM 2500 Engine Vibration Characteristics -- 6.18 Preventing Sub-Synchronous Vibrations in Large Steam Turbines -- 6.19 Example Problems -- References & Bibliography.
Part-III : Engine Operational Characteristics -- Chapter 7. Experimental and Test Measurement -- 7.1 Introduction -- 7.2 Vibrations Sensors -- 7.3 Measurement Techniques -- 7.4 Signal Processing -- 7.5 Modal Analysis -- 7.6 Analyzing Transient Machinery Vibrations -- 7.7 Positioning Strain Gauges Blades -- 7.8 Blade Vibration Measurement -- 7.9 High Temperature Proximity Measurement -- 7.10 Blade Tip Timing Methods -- 7.11 Testing Under Transient Conditions -- 7.12 Mode Localization and Forced Response in Bladed Disk -- 7.13 Lubricant Analysis -- 7.14 Bearing Element Defect Detection -- 7.15 Detection of Crack in Rotor -- 7.16 Radiation Thermometry Method -- 7.17 Life Prediction From Post-Service Oxidation -- 7.18 Leakage in Stepped Labyrinth -- 7.19 Compressor Surge Investigation Using Digital Velocimetry -- 7.20 Flow in Engine Exhaust System -- References & Bibliography -- Chapter 8. Balancing of Rotors -- 8.1 Introduction -- 8.2 Assembly and Operational Procedures and Rotor Vibrations -- 8.3 Balance Methods -- 8.4 Motion of Unbalanced Rotors -- 8.5 Correction Methods -- 8.6 Balancing of Rigid Rotor -- 8.7 Single Plane Balancing of Flexible Rotor -- 8.8 Overhung Thin Disk Rotor -- 8.9 Multi-Plane Balancing of Flexible Rotors -- 8.10 Balancing Machines -- 8.11 Balance Criteria -- 8.12 Example Problems -- References & Bibliography -- Chapter 9. Turbo-Machinery Noise -- 9.1 Introduction -- 9.2 Operating Parameters -- 9.3 Jet Engine Noise -- 9.4 Unsteady Flow Aspects and Noise -- 9.5 Rotating and Stationary Blade Interaction and Noise -- 9.6 Noise Generations in Industrial Turbines -- 9.7 Inlet and Exhaust Systems -- 9.8 Shaft Vibration and Noise -- 9.9 Correlation Between Dynamics and Noise -- 9.10 Procedures for Noise Evaluation -- 9.11 Static Tests -- 9.12 Monitoring for Quality Control -- 9.13 Suppression of Jet Noise -- 9.14 Damping Techniques.
9.15 Tuned Dampers -- 9.16 Example Problems -- References and Bibliography.
Abstract:
About the Book: STRUCTURAL DYNAMICS OF TURBO-MACHINES presents a detailed and comprehensive treatment of structural vibration evaluation of turbo-machines. Starting with the fundamentals of the theory of vibration as related to various aspects of rotating machines, the dynamic analysis procedures of a broad spectrum of turbo-machines is covered. An in-depth procedure for analyzing the torsional and flexural oscillations of the components and of the rotor-bearing system is presented. The latest trends in design and analysis are presented, chief among them: Blade and coupled disk-blade modes of vibration Dynamic instability, non-linear phenomena, their causes and consequences Methods to control rotor-to-stator clearance and improving operating efficiency Experimental techniques and analytical correlation with variables ranging from blade flutter to bearing orbital trajectory Fatigue failures arising from thermal ratcheting and cyclical operating loads Material characteristics and requirements Growth in machine operating parameters and user expectations require exacting consideration of dynamic characteristics. State-of-the-art technology is required to understand blade dynamics and rotating system vibrations. Vibration measurement is an important tool in diagnostics. This book develops methods to understand vibrations and correct major causes of related problems. Emphasis is placed on practical modeling methods, interpreting results and obtaining realistic solutions. Analysis as a problem solving tool is the focus. Contents: Vibration Theory Fundamentals Fan and Compressor Airfoils Turbine and Combustor Parts Bearing and Seal Characteristics Shaft Torsional Vibration Flexural Rotor Dynamics Experimental and Test Measurement Balancing of Rotors Turbo-Machinery Noise.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
Genre:
Electronic Access:
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