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عدد المساهمات : 19002 التقييم : 35506 تاريخ التسجيل : 01/07/2009 الدولة : مصر العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
| موضوع: كتاب Dynamics and Vibration Analyses of Gearbox in Wind Turbine السبت 14 نوفمبر 2020, 11:56 am | |
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أخوانى فى الله أحضرت لكم كتاب Dynamics and Vibration Analyses of Gearbox in Wind Turbine Qingkai Han , Jing Wei , Qingpeng Han , Hao Zhang
و المحتوى كما يلي :
Contents 1 Introduction 1 1.1 Requirement of Wind Turbine Gearbox . 1 1.2 Dynamics of Gearbox . 2 1.3 Structure Description of Gearbox in Wind Turbine 3 1.4 Modeling Methods for Dynamic and Vibration Analyses 4 1.5 Shaft Misalignment in Gearbox . 5 1.6 Measurement and Analysis of Gearbox Vibration 6 1.7 Works in This Book 6 References 7 2 Torsional Dynamics of Gear-Rotor System in Wind Turbine Gearbox . 9 2.1 Lumped Mass Model for Torsional Dynamics 9 2.1.1 Mechanical Schematic . 9 2.1.2 Definition of DOFs . 10 2.1.3 Mesh Stiffness Excitation 11 2.1.4 Transmission Error Excitation . 12 2.1.5 Mesh Damping in the Planetary Train . 13 2.1.6 Governing Equations 14 2.2 Torsional Dynamics of the Gearbox 19 2.3 Load Factors of Gear-Rotor System in Gearbox . 19 2.3.1 Analysis of System Excitation and Damping . 19 2.3.2 Load Factors of Gear-Rotor System 25 2.4 Load-Sharing Coefficients Based on Torsional Dynamics 30 2.4.1 Calculation of Load-Sharing Coefficients 31 2.4.2 Load-Sharing Structure Design 32 2.4.3 Load-Sharing Performance Effected by the Errors 35 2.5 Experimental Test of Load Balances in Gearbox 39 References 41 vii3 Parameter Optimization for Planetary Gear System Based on Torsional Dynamics . 43 3.1 Design Variables and Objective Function 43 3.2 The Constraint Function . 44 3.3 Parameter Optimization for High-Speed Transmission System with Parallel Axes . 47 3.4 Distribution of Reliability 48 3.5 Example and Analysis 48 References 51 4 Influence of Unbalance and Misalignment on Load-Sharing Coefficient of Gear-Rotor System Based on Torsional Dynamics 53 4.1 Modeling Method for Dynamic Analysis of Gear-Rotor System 53 4.1.1 Shaft Element . 53 4.1.2 Lumped Mass Element 54 4.1.3 Bearing Element . 55 4.1.4 Gear Meshing Element 56 4.1.5 Basic Principles and Dynamics Model 62 4.2 Load-Sharing Coefficient Analyses . 64 4.2.1 Load-Sharing Coefficient of Planetary Gear Trains . 64 4.2.2 Influence of Unbalance on Load-Sharing Coefficient . 64 4.2.3 Influence of Misalignment on Load-Sharing Coefficient 65 References 68 5 Modal Analyses Based on Whole Gearbox FE Model in Wind Turbine 71 5.1 FE Model of Transmission Chain System in Wind Turbine 71 5.2 Whole Gearbox FE Model (WG-FEM) of Wind Turbine 72 5.3 Modal Analysis of the Gearbox . 73 References 75 6 Vibration Measurements of Wind Turbine Gearbox . 77 6.1 Bench Tests 77 6.2 Operating Modal Tests 79 6.3 Vibrations of On-site Tests . 83 6.4 Fault Diagnoses for Wind Turbine Gearbox Based on Vibration Measurements 85 References 90 7 Vibration Signal Analyses of Gearbox in Time-Domain, Frequency-Domain, and Time–Frequency Domain . 91 7.1 Structure Description and Measuring Method . 91 7.2 Vibration Measurements of Wind Turbine Gearbox 93 viii Contents7.3 Analysis of Vibration Signals of Gearbox Based on Time Domain 93 7.4 Cross-Correlation Function Estimates of Vibration Signals . 95 7.5 Spectra Analysis of Vibration Signals of the Wind Turbine Gearbox . 96 7.6 Phase Analysis of Vibration Signals of Wind Turbine Gearbox . 101 7.6.1 Phase Analysis Based on Analytic Signal Theory with Hilbert Transform 101 7.6.2 Results of Phase Analysis of Vibration Signals of Wind Turbine Gearbox 103 7.7 Hilbert–Huang Transform Analysis of Vibration Signals of Wind Turbine Gearbox . 103 7.7.1 Basic Principle of Hilbert–Huang Transform Technique 106 7.7.2 HHT Analysis of Vibrations of Wind Turbine Gearbox . 114 References 116 8 Conclusions 117 Appendix A: Codes of Factor KA . 119 Appendix B: Codes of Time-frequency Analysis of Vibration Signals . 157 Appendix C: Codes of Hilbert-Huang Transform Analysis of Vibration Signals . 159
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