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Lukasz Brenkacz. Bearing Dynamic Coefficients in Rotordynamics
Table of Contents
List of Tables
List of Illustrations
Guide
Pages
Wiley‐ASME Press Series
Bearing Dynamic Coefficients in Rotordynamics. Computation Methods and Practical Applications
List of Figures
List of Tables
Preface
Symbols and Abbreviations. Symbols
Abbreviations
About the Companion Website
1 Introduction
1.1 Current State of Knowledge
1.2 Review of the Literature on Numerical Determination of Dynamic Coefficients of Bearings
1.3 Review of the Literature on Experimental Determination of Dynamic Coefficients of Bearings
1.4 Purpose and Scope of the Work
2 Practical Applications of Bearing Dynamic Coefficients
2.1 Single Degree of Freedom System Oscillations
2.1.1 Constant excitation Force
2.1.2 Excitation by Unbalance
2.1.3 Impact of Damping and Stiffness
2.2 Oscillation of Mass with Two Degrees of Freedom
2.3 Cross‐Coupled Stiffness and Damping Coefficients
2.4 Summary
3 Characteristics of the Research Subject
3.1 Basic Technical Data of the Laboratory Test Rig
3.2 Analysis of Rotor Dynamics
3.3 Analysis of the Supporting Structure
3.4 Summary
4 Research Tools
4.1 Test Equipment
4.2 Test.Lab Software
4.3 Samcef Rotors Software
4.4 Matlab Software
4.5 MESWIR Series Software (KINWIR, LDW, NLDW)
4.6 Abaqus Software
5 Algorithms for the Experimental Determination of Dynamic Coefficients of Bearings
5.1 Development of the Calculation Algorithm
5.2 Verification of the Calculation Algorithm on the Basis of a Numerical Model
5.3 Results of Calculations of Dynamic Coefficients of Bearings
5.4 Summary
6 Inclusion of the Impact of an Unbalanced Rotor
6.1 Calculation Scheme
6.2 Definition of the Scope of Identification
6.3 Results of the Calculation of Dynamic Coefficients of Bearings Including Rotor Unbalance
6.4 Summary
7 Sensitivity Analysis of the Experimental Method of Determining Dynamic Coefficients of Bearings
7.1 Method of Carrying Out a Sensitivity Analysis
7.2 Description of the Reference Model
7.3 Influence of the Stiffness of the Rotor Material
7.4 Influence of Uneven Force Distribution on Two Bearings
7.5 Changing the Direction of the Excitation Force and its Effect on the Results Obtained
7.6 Eddy Current Sensor Displacement Impact Assessment
7.7 Calculation Results for an Asymmetrical Rotor
7.8 Summary
8 Experimental Studies
8.1 Software Used for Processing of Signals from Experimental Research
8.2 Software Used for Calculations of Dynamic Coefficients of Bearings
8.3 Preparation of Experimental Tests
8.4 Implementation of Experimental Research
8.5 Processing of the Signal Measured During Experimental Tests
8.6 Results of Calculations of Dynamic Coefficients of Hydrodynamic Bearings on the Basis of Experimental Research
8.7 Verification of Results Obtained
8.8 Summary
9 Numerical Calculations of Bearing Dynamic Coefficients
9.1 Method of Calculating Dynamic Coefficients of Bearings
9.2 Calculation of Dynamic Coefficients of Bearings Using a Method with Linear Calculation Algorithm
9.3 Calculation of Dynamic Coefficients of Bearings Using a Method with Non‐linear Calculation Algorithm
9.4 Verification of Results Obtained
9.5 Summary
10 Comparison of Bearing Dynamic Coefficients Calculated with Different Methods
11 Summary and Conclusions
Appendix A
A.1 Fast Fourier Transform Diagrams of Journal Displacement in Relation to Bearing Housings
A.2 Journal Vibration Trajectories in Relation to Bearing Housings
A.3 Acceleration of Vibrations of Bearing Supports during Start‐up
A.4 Rotor Axial Alignment Report
Appendix B. B.1 Fragments of Code of the Program Used for Processing the Signal from Experimental Tests
B.2 Fragments of Code of the Program Used for Calculation of Dynamic Coefficients of Bearings on the Basis of Experimental Tests
Appendix C
C.1 Journal Vibration Trajectories Calculated in KINWIR and LDW Software
C.2 Journal Vibration Trajectories Calculated in NLDW Software
Research Funding
References
Index. a
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