Rotordynamics: 1st Edition (Hardback) book cover

Rotordynamics

1st Edition

By Agnieszka Muszynska

CRC Press

1,128 pages | 746 B/W Illus.

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Hardback: 9780824723996
pub: 2005-05-20
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Description

As the most important parts of rotating machinery, rotors are also the most prone to mechanical vibrations, which may lead to machine failure. Correction is only possible when proper and accurate diagnosis is obtained through understanding of rotor operation and all of the potential malfunctions that may occur. Mathematical modeling, in particular modal modeling, is key to understanding observed phenomena through measured data and for predicting and preventing failure.

Rotordynamics advances simple yet adequate models of rotordynamic problems and phenomena related to rotor operation in its environment. Based on Dr. Muszy(n´)ska's extensive work at Bently Rotor Dynamics Research Corporation, world renowned for innovative and groundbreaking experiments in the field, this book provides realistic models, step-by-step experimental methods, and the principles of vibration monitoring and practical malfunction diagnostics of rotating machinery. It covers extended rotor models, rotor/fluid-related phenomena, rotor-to-stationary part rubbing, and other related problems such as nonsynchronous perturbation testing. The author also illustrates practical diagnoses of several possible malfunctions and emphasizes correct interpretation of computer-generated numerical results.

Rotordynamics is the preeminent guide to rotordynamic theory and practice. It is the most valuable tool available for anyone working on modeling rotating machinery at the machine design stage or performing further analytical and experimental research on rotating machine dynamics.

Reviews

"On balance, the book provides readers with ideas and concepts as well as with a software leading to an "expert system" and to further developments in research centers. It represents a valuable contribution to the field."

-Peter P. Teodorescu, Zentralblatt MATH 1089

". . . well organised. Every chapter or major section starts with a brief but adequate introduction and literature review, and ends with a summary or closing remarks . . . This is a good textbook for graduate students, as well as a reference for engineers and researchers in the field of rotordynamics."

– Zhuang Li, Spectra Quest, Inc., in International Journal of Acoustics and Vibration, March 2007, Vol. 12, No. 1

Table of Contents

BASIC ROTORDYNAMICS: TWO LATERAL MODE ISOTROPIC ROTOR

Introduction

Mathematical Model of Two Lateral Mode Isotropic Rotor

Eigenvalue Problem-Rotor Free Response-Natural Frequencies

Rotor Static Displacement

Rotor Nonsynchronous Vibration Response

Unidirectional Harmonic, Nonsynchronous Excitation

Rotor Synchronous Excitation Due to Unbalance Force

Complex Dynamic Stiffness as a Function of Nonsynchronous Perturbation Frequency: Identification of the System Parameters. Nonsynchronous and Synchronous Perturbation

Closing Remarks

References

VIBRATION MONITORING OF ROTATING MACHINERY

Trends in Machinery Management Programs

Trends in Vibration Monitoring Instrumentation

Trend in the Knowledge on Rotating Machine Dynamics

Rotating Machine Vibration Monitoring and Data Processing Systems

Closing Remarks

References

BASIC ROTORDYNAMICS: EXTENDED ROTOR MODELS

Introduction

Rotor Modes

Model of the Rotor with Internal Friction

Isotropic Rotor in Flexible Anisotropic Supports: Backward Orbiting

Anisotropic Rotor in Isotropic Supports

Angular Momentum Model of an Isotropic Rotor

Angular Momentum Model of an Anisotropic Rotor with Anisotropic Disk

Model of Coupled Transversal and Angular Motion of the Isotropic Rotor with Axisymmetric Disk and Anisotropic Supports

Model of Coupled Lateral Transversal and Lateral Angular Motion of an Anisotropic Rotor with Unsymmetric Disk

Torsional and Torsional/Lateral Vibrations of Rotors

Misalignment Model

References

FLUID-RELATED PROBLEMS IN ROTOR/STATOR CLEARANCES

Introduction

Fluid Whirl and Fluid Whip: Rotor Self-Excited Vibrations

Mathematical Model of Fluid Forces in Rotor/Stator Clearances

Response of Two Lateral Modes Isotropic Rotor with Fluid Interaction to Nonsynchronous Excitation. Introduction to Identification of Rotor/Fluid Characteristics

Two Lateral Mode Fluid/Rotor Model Dynamic Behavior

Model of a Flexible Rotor Supported by One Pivoting, Laterally Rigid and One Fluid-Lubricated Bearing

Simplified Rotor/Seal and Rotor/Bearing Model and Its Solution

Modal Perturbation Testing and Identification of Rotor/Fluid Film Characteristics

Multimode Fluid Whirl and Fluid Whip in Rotor/Fluid Systems

Parametric Study of Stability of Rigid Body Modes of a Rotor Supported in Two Fluid-Lubricating Bearings with Different Characteristics

Comparison between "Bearing Coefficients" and "Bently/Muszynska" Model for Fluid-Lubricated Bearings

Rotor Supported in a Poorly Lubricated Bearing: Experiments and Numerical Simulation of the Fluid/Dry Contact Interaction

A Novel Analytical Study on the Rotor/Bearing or Rotor/Seal System Based on Reynolds Equations

Physical Factors That Control Fluid Whirl and Fluid Whip and Other Pertinent Results of Research

Fluid Force Model Adjustments

References

ROTOR-TO-STATIONARY PART RUBBING CONTACT IN ROTATING MACHINERY

Many Phenomena Occurring During Rotor-to-Stationary Part Contacts in Rotating Machines and Pertinent Literature Survey

Rotor/Seal Full Annular Rub Experimental Results

Rotor-to-Stationary Part Full Annular Contact Modeling

Rotor/Seal Full Annular Rub: Analysis

Impact of Free Rotor Against a Retainer Bearing

Partial Lateral Rotor-to-Stationary Part Rub

Chaotic Responses of Unbalanced Rotor/Bearing/Stator Systems with Looseness and/or Rubs

Thermal/Mechanical Effect of Rotor-to-Stator Rub

References

SELECTED TOPICS ON ROTORDYNAMICS

Introduction to Balancing

Dynamics of Anisotropically Supported Rotors

Specifics of Damping Evaluation in Rotating Machines

Stress in Rotating and Laterally Vibrating Machinery Rotors

Rotor Crack Detection by Using Vibration Measurements

Application of Multi-Mode Modal Models in Rotor Dynamics

Rotor Lateral/Torsional Vibration Coupling Due to Unbalance-Free, Forced, and Self-Excited Vibrations

Effect of Loose Rotating Parts on Rotor Dynamics

Forward and Backward Orbiting of a Vertical Anisotropically Supported Rotor

References

VIBRATIONAL DIAGNOSTICS OF ROTATING MACHINERY MALFUNCTIONS ILLUSTRATED BY BASIC MATHEMATICAL MODELS OF THE ROTOR SYSTEM

Introduction

Diagnosis of Particular Malfunctions of Rotating Machines Illustrated by Basic Mathematical Models of the Rotor

Advancement Trends in Vibration Monitoring and Diagnostics of Rotating Machinery Malfunctions

References

APPENDICES

GLOSSARY

INDEX

About the Series

Mechanical Engineering

A Series of Textbooks and Reference Books

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Subject Categories

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