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An in-depth analysis of machine vibration in rotating machinery Whether it's a compressor on an offshore platform, a turbocharger in a truck or automobile, or a turbine in a jet airplane, rotating machinery is the driving force behind almost anything that produces or uses energy. Counted on daily to perform any number of vital societal tasks, turbomachinery uses high rotational speeds to produce amazing amounts of power efficiently. The key to increasing its longevity, efficiency, and reliability lies in the examination of rotor vibration and bearing dynamics, a field called rotordynamics. A…mehr
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An in-depth analysis of machine vibration in rotating machinery Whether it's a compressor on an offshore platform, a turbocharger in a truck or automobile, or a turbine in a jet airplane, rotating machinery is the driving force behind almost anything that produces or uses energy. Counted on daily to perform any number of vital societal tasks, turbomachinery uses high rotational speeds to produce amazing amounts of power efficiently. The key to increasing its longevity, efficiency, and reliability lies in the examination of rotor vibration and bearing dynamics, a field called rotordynamics. A valuable textbook for beginners as well as a handy reference for experts, Machinery Vibration and Rotordynamics is teeming with rich technical detail and real-world examples geared toward the study of machine vibration. A logical progression of information covers essential fundamentals, in-depth case studies, and the latest analytical tools used for predicting and preventing damage in rotating machinery. Machinery Vibration and Rotordynamics: * Combines rotordynamics with the applications of machinery vibration in a single volume * Includes case studies of vibration problems in several different types of machines as well as computer simulation models used in industry * Contains fundamental physical phenomena, mathematical and computational aspects, practical hardware considerations, troubleshooting, and instrumentation and measurement techniques For students interested in entering this highly specialized field of study, as well as professionals seeking to expand their knowledge base, Machinery Vibration and Rotordynamics will serve as the one book they will come to rely upon consistently.
Produktdetails
- Produktdetails
- Verlag: John Wiley & Sons / Turner Publishing Company
- Seitenzahl: 416
- Erscheinungstermin: 24. Mai 2010
- Englisch
- Abmessung: 244mm x 162mm x 29mm
- Gewicht: 690g
- ISBN-13: 9780471462132
- ISBN-10: 0471462136
- Artikelnr.: 29337630
- Verlag: John Wiley & Sons / Turner Publishing Company
- Seitenzahl: 416
- Erscheinungstermin: 24. Mai 2010
- Englisch
- Abmessung: 244mm x 162mm x 29mm
- Gewicht: 690g
- ISBN-13: 9780471462132
- ISBN-10: 0471462136
- Artikelnr.: 29337630
Dr. JOHN M. VANCE was professor of mechanical engineering at Texas A&M University, retiring in 2007. He received his PhD (1967) degree from The University of Texas at Austin. His book Rotordynamics of Turbomachinery (Wiley) has sold more than 3,000 copies and is used by turbomachinery engineers around the world. He is an inventor on several patents relating to rotating machinery and vibration reduction. His patented TAMSEAL has been retrofitted to solve vibration problems in a number of high-pressure industrial compressors. He is an ASME Fellow and a registered professional engineer in the state of Texas. Dr. FOUAD Y. ZEIDAN is the President of KMC, Inc., and Bearings Plus, Inc., two companies specializing in the supply of high-performance bearings, flexible couplings, and seals. Dr. Zeidan holds nine U.S. patents for integral squeeze film dampers and high-performance journal and thrust bearings. He has published more than thirty technical papers and articles on various turbomachinery topics and has been lecturing at the Annual Machinery Vibrations and Rotordynamics short course since 1991. Dr. Zeidan holds a BS, MS, and PhD degrees in mechanical engineering from Texas A&M University. BRIAN T. MURPHY, PhD, PE, is a senior research scientist with the Center for Electromechanics at The University of Texas at Austin. He is also president of RMA, Inc., which develops and markets the Xlrotor suite of rotordynamic analysis software used worldwide by industry and academia. Dr. Murphy is the creator of the polynomial transfer matrix method, which is the fastest known method of performing rotordynamic calculations. He has authored numerous technical papers on rotordynamics and machinery vibration, and is also caretaker of the Web site www.rotordynamics.org.
PREFACE. 1 Fundamentals of Machine Vibration and Classical Solutions. The
Main Sources of Vibration in Machinery. The Single Degree of Freedom (SDOF)
Model. Using Simple Models for Analysis and Diagnostics. Six Techniques for
Solving Vibration Problems with Forced Excitation. Some Examples with
Forced Excitation. Illustrative Example 1. Illustrative Example 2.
Illustrative Example 3. Illustrative Example 4. Some Observations about
Modeling. Unstable Vibration. References. Exercises. 2 Torsional Vibration.
Torsional Vibration Indicators. Objectives of Torsional Vibration Analysis.
Simplified Models. Computer Models. Kinetic Energy Expression. Potential
Energy. Torsional Vibration Measurement. French's Comparison Experiments.
Strain Gages. Carrier Signal Transducers. Frequency-modulated Systems.
Amplitude-modulated Systems. Frequency Analysis and the Sideband System.
French's Test Procedure and Results. A Special Tape for Optical
Transducers. Time-interval Measurement Systems. Results from Toram's
Method. Results from the Barrios/Darlow Method. References. Exercises. 3
Introduction to Rotordynamics Analysis. Objectives of Rotordynamics
Analysis. The Spring-Mass Model. Synchronous and Nonsynchronous Whirl.
Analysis of the Jeffcott Rotor. Polar Coordinates. Cartesian Coordinates.
Physical Significance of the Solutions. Three Ways to Reduce Synchronous
Whirl Amplitudes. Some Damping Definitions. The "Gravity Critical".
Critical Speed Definitions. Effect of Flexible (Soft) Supports.
Rotordynamic Effects of the Force Coefficients--A Summary. The Direct
Coefficients. The Cross-coupled Coefficients. Rotordynamic Instability.
Effect of Cross-Coupled Stiffness on Unbalance Response. Added
Complexities. Gyroscopic Effects. Effect of Support Asymmetry on
Synchronous Whirl. False Instabilities. References. Exercises. 4 Computer
Simulations of Rotordynamics. Different Types of Models. Bearing and Seal
Matrices. Torsional and Axial Models. Different Types of Analyses.
Eigenanalysis. Linear Forced Response (LFR). Transient Response. Shaft
Modeling Recommendations. How Many Elements. 45-Degree Rule. Interference
Fits. Laminations. Trunnions. Impeller Inertias via CAD Software. Stations
for Added Weights. Rap Test Verification of Models. Stations for Bearings
and Seals. Flexible Couplings. Example Simulations. Damped Natural
Frequency Map (NDF). Modal Damping Map. Root Locus Map. Undamped Critical
Speed Map. Mode Shapes. Bode/Polar Response Plot. Orbit Response Plot.
Bearing Load Response Plot. Operating Deflected Shape (ODS). Housing
Vibration (ips and g's). References. 5 Bearings and Their Effect on
Rotordynamics. Fluid Film Bearings. Fixed-geometry Sleeve Bearings.
Variable-geometry Tilting Pad Bearings. Fluid Film Bearing Dynamic
Coefficients and Methods of Obtaining Them. Load Between Pivots Versus Load
on Pivot. Influence of Preload on the Dynamic Coefficients in Tilt Pad
Bearings. Influence of the Bearing Length or Pad Length. Influence of the
Pivot Offset. Influence of the Number of Pads. Ball and Rolling Element
Bearings. Case Study: Bearing Support Design for a Rocket Engine Turbopump.
Ball Bearing Stiffness Measurements. Wire Mesh Damper Experiments and
Computer Simulations. Squeeze Film Dampers. Squeeze Film Damper without a
Centering Spring. O-ring Supported Dampers. Squirrel Cage Supported
Dampers. Integral Squeeze Film Dampers. Squeeze Film Damper Rotordynamic
Force Coefficients. Applications of Squeeze Film Dampers. Optimization for
Improving Stability in a Centrifugal Process Compressor. Using Dampers to
Improve the Synchronous Response. Using the Damper to Shift a Critical
Speed or a Resonance. Insights into the Rotor-Bearing Dynamic Interaction
with Soft/Stiff Bearing Supports. Influence on Natural Frequencies with
Soft/Stiff Bearing Supports. Effects of Mass Distribution on the Critical
Speeds with Soft/Stiff Bearing Supports. Influence of Overhung Mass on
Natural Frequencies with Soft/Stiff Supports. Influence of Gyroscopic
Moments on Natural Frequencies with Soft/Stiff Bearing Supports.
References. Exercises. Appendix: Shaft With No Added Weight. 6 Fluid Seals
and Their Effect on Rotordynamics. Function and Classification of Seals.
Plain Smooth Seals. Floating Ring Seals. Conventional Gas Labyrinth Seals.
Pocket Damper Seals. Honeycomb Seals. Hole-pattern Seals. Brush Seals.
Understanding and Modeling Damper Seal Force Coefficients. Alford's
Hypothesis of Labyrinth Seal Damping. Cross-coupled Stiffness Measurements.
Invention of the Pocket Damper Seal. Pocket Damper Seal Theory.
Rotordynamic Testing of Pocket Damper Seals. Impedance Measurements of
Pocket Damper Seal Force Coefficients (Stiffness and Damping) and Leakage
at Low Pressures. The Fully Partitioned PDS Design. Effects of Negative
Stiffness. Frequency Dependence of Damper Seals. Laboratory Measurements of
Stiffness and Damping from Pocket Damper Seals at High Pressures. The
Conventional Design. The Fully Partitioned Design. Field Experience with
Pocket Damper Seals. Two Back-to-Back Compressor Applications. Case 1. Case
2. A Fully Partitioned Application. Designing for Desired Force Coefficient
Characteristics. The Conventional PDS Design. The Fully Partitioned Pocket
Damper Seal. Leakage Considerations. Some Comparisons of Different Types of
Annular Gas Seals. References. 7 History of Machinery Rotordynamics. The
Foundation Years, 1869-1941. Shaft Dynamics. Bearings. Refining and
Expanding the Rotordynamic Model, 1942-1963. Multistage Compressors and
Turbines, Rocket Engine Turbopumps, and Damper Seals, 1964-Present.
Stability Problems with Multistage Centrifugal Compressors. Kaybob,
1971-72. Ekofisk, 1974-75. Subsequent Developments. New Frontiers of Speed
and Power Density with Rocket Engine Turbopumps. The Space Shuttle Main
Engine (SSME). High-pressure Fuel Turbopump (HPFTP). Rotordynamic
Instability Problem. Noncontacting Damper Seals. Shaft Differential Heating
(The Morton Effect). References. INDEX.
Main Sources of Vibration in Machinery. The Single Degree of Freedom (SDOF)
Model. Using Simple Models for Analysis and Diagnostics. Six Techniques for
Solving Vibration Problems with Forced Excitation. Some Examples with
Forced Excitation. Illustrative Example 1. Illustrative Example 2.
Illustrative Example 3. Illustrative Example 4. Some Observations about
Modeling. Unstable Vibration. References. Exercises. 2 Torsional Vibration.
Torsional Vibration Indicators. Objectives of Torsional Vibration Analysis.
Simplified Models. Computer Models. Kinetic Energy Expression. Potential
Energy. Torsional Vibration Measurement. French's Comparison Experiments.
Strain Gages. Carrier Signal Transducers. Frequency-modulated Systems.
Amplitude-modulated Systems. Frequency Analysis and the Sideband System.
French's Test Procedure and Results. A Special Tape for Optical
Transducers. Time-interval Measurement Systems. Results from Toram's
Method. Results from the Barrios/Darlow Method. References. Exercises. 3
Introduction to Rotordynamics Analysis. Objectives of Rotordynamics
Analysis. The Spring-Mass Model. Synchronous and Nonsynchronous Whirl.
Analysis of the Jeffcott Rotor. Polar Coordinates. Cartesian Coordinates.
Physical Significance of the Solutions. Three Ways to Reduce Synchronous
Whirl Amplitudes. Some Damping Definitions. The "Gravity Critical".
Critical Speed Definitions. Effect of Flexible (Soft) Supports.
Rotordynamic Effects of the Force Coefficients--A Summary. The Direct
Coefficients. The Cross-coupled Coefficients. Rotordynamic Instability.
Effect of Cross-Coupled Stiffness on Unbalance Response. Added
Complexities. Gyroscopic Effects. Effect of Support Asymmetry on
Synchronous Whirl. False Instabilities. References. Exercises. 4 Computer
Simulations of Rotordynamics. Different Types of Models. Bearing and Seal
Matrices. Torsional and Axial Models. Different Types of Analyses.
Eigenanalysis. Linear Forced Response (LFR). Transient Response. Shaft
Modeling Recommendations. How Many Elements. 45-Degree Rule. Interference
Fits. Laminations. Trunnions. Impeller Inertias via CAD Software. Stations
for Added Weights. Rap Test Verification of Models. Stations for Bearings
and Seals. Flexible Couplings. Example Simulations. Damped Natural
Frequency Map (NDF). Modal Damping Map. Root Locus Map. Undamped Critical
Speed Map. Mode Shapes. Bode/Polar Response Plot. Orbit Response Plot.
Bearing Load Response Plot. Operating Deflected Shape (ODS). Housing
Vibration (ips and g's). References. 5 Bearings and Their Effect on
Rotordynamics. Fluid Film Bearings. Fixed-geometry Sleeve Bearings.
Variable-geometry Tilting Pad Bearings. Fluid Film Bearing Dynamic
Coefficients and Methods of Obtaining Them. Load Between Pivots Versus Load
on Pivot. Influence of Preload on the Dynamic Coefficients in Tilt Pad
Bearings. Influence of the Bearing Length or Pad Length. Influence of the
Pivot Offset. Influence of the Number of Pads. Ball and Rolling Element
Bearings. Case Study: Bearing Support Design for a Rocket Engine Turbopump.
Ball Bearing Stiffness Measurements. Wire Mesh Damper Experiments and
Computer Simulations. Squeeze Film Dampers. Squeeze Film Damper without a
Centering Spring. O-ring Supported Dampers. Squirrel Cage Supported
Dampers. Integral Squeeze Film Dampers. Squeeze Film Damper Rotordynamic
Force Coefficients. Applications of Squeeze Film Dampers. Optimization for
Improving Stability in a Centrifugal Process Compressor. Using Dampers to
Improve the Synchronous Response. Using the Damper to Shift a Critical
Speed or a Resonance. Insights into the Rotor-Bearing Dynamic Interaction
with Soft/Stiff Bearing Supports. Influence on Natural Frequencies with
Soft/Stiff Bearing Supports. Effects of Mass Distribution on the Critical
Speeds with Soft/Stiff Bearing Supports. Influence of Overhung Mass on
Natural Frequencies with Soft/Stiff Supports. Influence of Gyroscopic
Moments on Natural Frequencies with Soft/Stiff Bearing Supports.
References. Exercises. Appendix: Shaft With No Added Weight. 6 Fluid Seals
and Their Effect on Rotordynamics. Function and Classification of Seals.
Plain Smooth Seals. Floating Ring Seals. Conventional Gas Labyrinth Seals.
Pocket Damper Seals. Honeycomb Seals. Hole-pattern Seals. Brush Seals.
Understanding and Modeling Damper Seal Force Coefficients. Alford's
Hypothesis of Labyrinth Seal Damping. Cross-coupled Stiffness Measurements.
Invention of the Pocket Damper Seal. Pocket Damper Seal Theory.
Rotordynamic Testing of Pocket Damper Seals. Impedance Measurements of
Pocket Damper Seal Force Coefficients (Stiffness and Damping) and Leakage
at Low Pressures. The Fully Partitioned PDS Design. Effects of Negative
Stiffness. Frequency Dependence of Damper Seals. Laboratory Measurements of
Stiffness and Damping from Pocket Damper Seals at High Pressures. The
Conventional Design. The Fully Partitioned Design. Field Experience with
Pocket Damper Seals. Two Back-to-Back Compressor Applications. Case 1. Case
2. A Fully Partitioned Application. Designing for Desired Force Coefficient
Characteristics. The Conventional PDS Design. The Fully Partitioned Pocket
Damper Seal. Leakage Considerations. Some Comparisons of Different Types of
Annular Gas Seals. References. 7 History of Machinery Rotordynamics. The
Foundation Years, 1869-1941. Shaft Dynamics. Bearings. Refining and
Expanding the Rotordynamic Model, 1942-1963. Multistage Compressors and
Turbines, Rocket Engine Turbopumps, and Damper Seals, 1964-Present.
Stability Problems with Multistage Centrifugal Compressors. Kaybob,
1971-72. Ekofisk, 1974-75. Subsequent Developments. New Frontiers of Speed
and Power Density with Rocket Engine Turbopumps. The Space Shuttle Main
Engine (SSME). High-pressure Fuel Turbopump (HPFTP). Rotordynamic
Instability Problem. Noncontacting Damper Seals. Shaft Differential Heating
(The Morton Effect). References. INDEX.
PREFACE. 1 Fundamentals of Machine Vibration and Classical Solutions. The
Main Sources of Vibration in Machinery. The Single Degree of Freedom (SDOF)
Model. Using Simple Models for Analysis and Diagnostics. Six Techniques for
Solving Vibration Problems with Forced Excitation. Some Examples with
Forced Excitation. Illustrative Example 1. Illustrative Example 2.
Illustrative Example 3. Illustrative Example 4. Some Observations about
Modeling. Unstable Vibration. References. Exercises. 2 Torsional Vibration.
Torsional Vibration Indicators. Objectives of Torsional Vibration Analysis.
Simplified Models. Computer Models. Kinetic Energy Expression. Potential
Energy. Torsional Vibration Measurement. French's Comparison Experiments.
Strain Gages. Carrier Signal Transducers. Frequency-modulated Systems.
Amplitude-modulated Systems. Frequency Analysis and the Sideband System.
French's Test Procedure and Results. A Special Tape for Optical
Transducers. Time-interval Measurement Systems. Results from Toram's
Method. Results from the Barrios/Darlow Method. References. Exercises. 3
Introduction to Rotordynamics Analysis. Objectives of Rotordynamics
Analysis. The Spring-Mass Model. Synchronous and Nonsynchronous Whirl.
Analysis of the Jeffcott Rotor. Polar Coordinates. Cartesian Coordinates.
Physical Significance of the Solutions. Three Ways to Reduce Synchronous
Whirl Amplitudes. Some Damping Definitions. The "Gravity Critical".
Critical Speed Definitions. Effect of Flexible (Soft) Supports.
Rotordynamic Effects of the Force Coefficients--A Summary. The Direct
Coefficients. The Cross-coupled Coefficients. Rotordynamic Instability.
Effect of Cross-Coupled Stiffness on Unbalance Response. Added
Complexities. Gyroscopic Effects. Effect of Support Asymmetry on
Synchronous Whirl. False Instabilities. References. Exercises. 4 Computer
Simulations of Rotordynamics. Different Types of Models. Bearing and Seal
Matrices. Torsional and Axial Models. Different Types of Analyses.
Eigenanalysis. Linear Forced Response (LFR). Transient Response. Shaft
Modeling Recommendations. How Many Elements. 45-Degree Rule. Interference
Fits. Laminations. Trunnions. Impeller Inertias via CAD Software. Stations
for Added Weights. Rap Test Verification of Models. Stations for Bearings
and Seals. Flexible Couplings. Example Simulations. Damped Natural
Frequency Map (NDF). Modal Damping Map. Root Locus Map. Undamped Critical
Speed Map. Mode Shapes. Bode/Polar Response Plot. Orbit Response Plot.
Bearing Load Response Plot. Operating Deflected Shape (ODS). Housing
Vibration (ips and g's). References. 5 Bearings and Their Effect on
Rotordynamics. Fluid Film Bearings. Fixed-geometry Sleeve Bearings.
Variable-geometry Tilting Pad Bearings. Fluid Film Bearing Dynamic
Coefficients and Methods of Obtaining Them. Load Between Pivots Versus Load
on Pivot. Influence of Preload on the Dynamic Coefficients in Tilt Pad
Bearings. Influence of the Bearing Length or Pad Length. Influence of the
Pivot Offset. Influence of the Number of Pads. Ball and Rolling Element
Bearings. Case Study: Bearing Support Design for a Rocket Engine Turbopump.
Ball Bearing Stiffness Measurements. Wire Mesh Damper Experiments and
Computer Simulations. Squeeze Film Dampers. Squeeze Film Damper without a
Centering Spring. O-ring Supported Dampers. Squirrel Cage Supported
Dampers. Integral Squeeze Film Dampers. Squeeze Film Damper Rotordynamic
Force Coefficients. Applications of Squeeze Film Dampers. Optimization for
Improving Stability in a Centrifugal Process Compressor. Using Dampers to
Improve the Synchronous Response. Using the Damper to Shift a Critical
Speed or a Resonance. Insights into the Rotor-Bearing Dynamic Interaction
with Soft/Stiff Bearing Supports. Influence on Natural Frequencies with
Soft/Stiff Bearing Supports. Effects of Mass Distribution on the Critical
Speeds with Soft/Stiff Bearing Supports. Influence of Overhung Mass on
Natural Frequencies with Soft/Stiff Supports. Influence of Gyroscopic
Moments on Natural Frequencies with Soft/Stiff Bearing Supports.
References. Exercises. Appendix: Shaft With No Added Weight. 6 Fluid Seals
and Their Effect on Rotordynamics. Function and Classification of Seals.
Plain Smooth Seals. Floating Ring Seals. Conventional Gas Labyrinth Seals.
Pocket Damper Seals. Honeycomb Seals. Hole-pattern Seals. Brush Seals.
Understanding and Modeling Damper Seal Force Coefficients. Alford's
Hypothesis of Labyrinth Seal Damping. Cross-coupled Stiffness Measurements.
Invention of the Pocket Damper Seal. Pocket Damper Seal Theory.
Rotordynamic Testing of Pocket Damper Seals. Impedance Measurements of
Pocket Damper Seal Force Coefficients (Stiffness and Damping) and Leakage
at Low Pressures. The Fully Partitioned PDS Design. Effects of Negative
Stiffness. Frequency Dependence of Damper Seals. Laboratory Measurements of
Stiffness and Damping from Pocket Damper Seals at High Pressures. The
Conventional Design. The Fully Partitioned Design. Field Experience with
Pocket Damper Seals. Two Back-to-Back Compressor Applications. Case 1. Case
2. A Fully Partitioned Application. Designing for Desired Force Coefficient
Characteristics. The Conventional PDS Design. The Fully Partitioned Pocket
Damper Seal. Leakage Considerations. Some Comparisons of Different Types of
Annular Gas Seals. References. 7 History of Machinery Rotordynamics. The
Foundation Years, 1869-1941. Shaft Dynamics. Bearings. Refining and
Expanding the Rotordynamic Model, 1942-1963. Multistage Compressors and
Turbines, Rocket Engine Turbopumps, and Damper Seals, 1964-Present.
Stability Problems with Multistage Centrifugal Compressors. Kaybob,
1971-72. Ekofisk, 1974-75. Subsequent Developments. New Frontiers of Speed
and Power Density with Rocket Engine Turbopumps. The Space Shuttle Main
Engine (SSME). High-pressure Fuel Turbopump (HPFTP). Rotordynamic
Instability Problem. Noncontacting Damper Seals. Shaft Differential Heating
(The Morton Effect). References. INDEX.
Main Sources of Vibration in Machinery. The Single Degree of Freedom (SDOF)
Model. Using Simple Models for Analysis and Diagnostics. Six Techniques for
Solving Vibration Problems with Forced Excitation. Some Examples with
Forced Excitation. Illustrative Example 1. Illustrative Example 2.
Illustrative Example 3. Illustrative Example 4. Some Observations about
Modeling. Unstable Vibration. References. Exercises. 2 Torsional Vibration.
Torsional Vibration Indicators. Objectives of Torsional Vibration Analysis.
Simplified Models. Computer Models. Kinetic Energy Expression. Potential
Energy. Torsional Vibration Measurement. French's Comparison Experiments.
Strain Gages. Carrier Signal Transducers. Frequency-modulated Systems.
Amplitude-modulated Systems. Frequency Analysis and the Sideband System.
French's Test Procedure and Results. A Special Tape for Optical
Transducers. Time-interval Measurement Systems. Results from Toram's
Method. Results from the Barrios/Darlow Method. References. Exercises. 3
Introduction to Rotordynamics Analysis. Objectives of Rotordynamics
Analysis. The Spring-Mass Model. Synchronous and Nonsynchronous Whirl.
Analysis of the Jeffcott Rotor. Polar Coordinates. Cartesian Coordinates.
Physical Significance of the Solutions. Three Ways to Reduce Synchronous
Whirl Amplitudes. Some Damping Definitions. The "Gravity Critical".
Critical Speed Definitions. Effect of Flexible (Soft) Supports.
Rotordynamic Effects of the Force Coefficients--A Summary. The Direct
Coefficients. The Cross-coupled Coefficients. Rotordynamic Instability.
Effect of Cross-Coupled Stiffness on Unbalance Response. Added
Complexities. Gyroscopic Effects. Effect of Support Asymmetry on
Synchronous Whirl. False Instabilities. References. Exercises. 4 Computer
Simulations of Rotordynamics. Different Types of Models. Bearing and Seal
Matrices. Torsional and Axial Models. Different Types of Analyses.
Eigenanalysis. Linear Forced Response (LFR). Transient Response. Shaft
Modeling Recommendations. How Many Elements. 45-Degree Rule. Interference
Fits. Laminations. Trunnions. Impeller Inertias via CAD Software. Stations
for Added Weights. Rap Test Verification of Models. Stations for Bearings
and Seals. Flexible Couplings. Example Simulations. Damped Natural
Frequency Map (NDF). Modal Damping Map. Root Locus Map. Undamped Critical
Speed Map. Mode Shapes. Bode/Polar Response Plot. Orbit Response Plot.
Bearing Load Response Plot. Operating Deflected Shape (ODS). Housing
Vibration (ips and g's). References. 5 Bearings and Their Effect on
Rotordynamics. Fluid Film Bearings. Fixed-geometry Sleeve Bearings.
Variable-geometry Tilting Pad Bearings. Fluid Film Bearing Dynamic
Coefficients and Methods of Obtaining Them. Load Between Pivots Versus Load
on Pivot. Influence of Preload on the Dynamic Coefficients in Tilt Pad
Bearings. Influence of the Bearing Length or Pad Length. Influence of the
Pivot Offset. Influence of the Number of Pads. Ball and Rolling Element
Bearings. Case Study: Bearing Support Design for a Rocket Engine Turbopump.
Ball Bearing Stiffness Measurements. Wire Mesh Damper Experiments and
Computer Simulations. Squeeze Film Dampers. Squeeze Film Damper without a
Centering Spring. O-ring Supported Dampers. Squirrel Cage Supported
Dampers. Integral Squeeze Film Dampers. Squeeze Film Damper Rotordynamic
Force Coefficients. Applications of Squeeze Film Dampers. Optimization for
Improving Stability in a Centrifugal Process Compressor. Using Dampers to
Improve the Synchronous Response. Using the Damper to Shift a Critical
Speed or a Resonance. Insights into the Rotor-Bearing Dynamic Interaction
with Soft/Stiff Bearing Supports. Influence on Natural Frequencies with
Soft/Stiff Bearing Supports. Effects of Mass Distribution on the Critical
Speeds with Soft/Stiff Bearing Supports. Influence of Overhung Mass on
Natural Frequencies with Soft/Stiff Supports. Influence of Gyroscopic
Moments on Natural Frequencies with Soft/Stiff Bearing Supports.
References. Exercises. Appendix: Shaft With No Added Weight. 6 Fluid Seals
and Their Effect on Rotordynamics. Function and Classification of Seals.
Plain Smooth Seals. Floating Ring Seals. Conventional Gas Labyrinth Seals.
Pocket Damper Seals. Honeycomb Seals. Hole-pattern Seals. Brush Seals.
Understanding and Modeling Damper Seal Force Coefficients. Alford's
Hypothesis of Labyrinth Seal Damping. Cross-coupled Stiffness Measurements.
Invention of the Pocket Damper Seal. Pocket Damper Seal Theory.
Rotordynamic Testing of Pocket Damper Seals. Impedance Measurements of
Pocket Damper Seal Force Coefficients (Stiffness and Damping) and Leakage
at Low Pressures. The Fully Partitioned PDS Design. Effects of Negative
Stiffness. Frequency Dependence of Damper Seals. Laboratory Measurements of
Stiffness and Damping from Pocket Damper Seals at High Pressures. The
Conventional Design. The Fully Partitioned Design. Field Experience with
Pocket Damper Seals. Two Back-to-Back Compressor Applications. Case 1. Case
2. A Fully Partitioned Application. Designing for Desired Force Coefficient
Characteristics. The Conventional PDS Design. The Fully Partitioned Pocket
Damper Seal. Leakage Considerations. Some Comparisons of Different Types of
Annular Gas Seals. References. 7 History of Machinery Rotordynamics. The
Foundation Years, 1869-1941. Shaft Dynamics. Bearings. Refining and
Expanding the Rotordynamic Model, 1942-1963. Multistage Compressors and
Turbines, Rocket Engine Turbopumps, and Damper Seals, 1964-Present.
Stability Problems with Multistage Centrifugal Compressors. Kaybob,
1971-72. Ekofisk, 1974-75. Subsequent Developments. New Frontiers of Speed
and Power Density with Rocket Engine Turbopumps. The Space Shuttle Main
Engine (SSME). High-pressure Fuel Turbopump (HPFTP). Rotordynamic
Instability Problem. Noncontacting Damper Seals. Shaft Differential Heating
(The Morton Effect). References. INDEX.