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E-grāmata: Dynamics and Vibration Analyses of Gearbox in Wind Turbine

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  • Formāts: PDF+DRM
  • Izdošanas datums: 27-Sep-2016
  • Izdevniecība: Springer Verlag, Singapore
  • Valoda: eng
  • ISBN-13: 9789811027475
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Dynamics and Vibration Analyses of Gearbox in Wind TurbinePalielināt
  • Formāts: PDF+DRM
  • Izdošanas datums: 27-Sep-2016
  • Izdevniecība: Springer Verlag, Singapore
  • Valoda: eng
  • ISBN-13: 9789811027475
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This book explores the dynamics and vibration properties of gearboxes, with a focus on geared rotor systems. It discusses mechanical theories, finite-element based simulations, experimental measurements and vibration signal processing techniques.

It introduces the vibration-resonance calculation method for the geared rotor system in wind turbines and load sharing of the planetary gear train, and offers a method for calculating the vibrations of geared rotor systems under either internal excitations from gear sets or external loads transferred from wind loads. It also defines and elaborates on parameter optimization for planetary gear systems based on the torsional dynamics of wind-turbine geared rotor systems. Moreover, it describes experimental measurements of vibrations on the wind-turbine gearbox performed on the test rig and on site, and analyzes the vibration signals of different testing points, showing them in both time and frequency domains. Lastly, it lists the gear coupling frequencies and fault characteristic frequencies from the vibrations of the gearbox housing.





The technologies and results presented are valuable resources for use in dynamic design, vibration prediction and analysis of gearboxes and geared rotor systems in wind turbines as well as many other machines. 
1 Introduction
1(8)
1.1 Requirement of Wind Turbine Gearbox
1(1)
1.2 Dynamics of Gearbox
2(1)
1.3 Structure Description of Gearbox in Wind Turbine
3(1)
1.4 Modeling Methods for Dynamic and Vibration Analyses
4(1)
1.5 Shaft Misalignment in Gearbox
5(1)
1.6 Measurement and Analysis of Gearbox Vibration
6(1)
1.7 Works in This Book
6(3)
References
7(2)
2 Torsional Dynamics of Gear-Rotor System in Wind Turbine Gearbox
9(34)
2.1 Lumped Mass Model for Torsional Dynamics
9(10)
2.1.1 Mechanical Schematic
9(1)
2.1.2 Definition of DOFs
10(1)
2.1.3 Mesh Stiffness Excitation
11(1)
2.1.4 Transmission Error Excitation
12(1)
2.1.5 Mesh Damping in the Planetary Train
13(1)
2.1.6 Governing Equations
14(5)
2.2 Torsional Dynamics of the Gearbox
19(1)
2.3 Load Factors of Gear-Rotor System in Gearbox
19(11)
2.3.1 Analysis of System Excitation and Damping
19(6)
2.3.2 Load Factors of Gear-Rotor System
25(5)
2.4 Load-Sharing Coefficients Based on Torsional Dynamics
30(9)
2.4.1 Calculation of Load-Sharing Coefficients
31(1)
2.4.2 Load-Sharing Structure Design
32(3)
2.4.3 Load-Sharing Performance Effected by the Errors
35(4)
2.5 Experimental Test of Load Balances in Gearbox
39(4)
References
41(2)
3 Parameter Optimization for Planetary Gear System Based on Torsional Dynamics
43(10)
3.1 Design Variables and Objective Function
43(1)
3.2 The Constraint Function
44(3)
3.3 Parameter Optimization for High-Speed Transmission System with Parallel Axes
47(1)
3.4 Distribution of Reliability
48(1)
3.5 Example and Analysis
48(5)
References
51(2)
4 Influence of Unbalance and Misalignment on Load-Sharing Coefficient of Gear-Rotor System Based on Torsional Dynamics
53(18)
4.1 Modeling Method for Dynamic Analysis of Gear-Rotor System
53(11)
4.1.1 Shaft Element
53(1)
4.1.2 Lumped Mass Element
54(1)
4.1.3 Bearing Element
55(1)
4.1.4 Gear Meshing Element
56(6)
4.1.5 Basic Principles and Dynamics Model
62(2)
4.2 Load-Sharing Coefficient Analyses
64(7)
4.2.1 Load-Sharing Coefficient of Planetary Gear Trains
64(1)
4.2.2 Influence of Unbalance on Load-Sharing Coefficient
64(1)
4.2.3 Influence of Misalignment on Load-Sharing Coefficient
65(3)
References
68(3)
5 Modal Analyses Based on Whole Gearbox FE Model in Wind Turbine
71(6)
5.1 FE Model of Transmission Chain System in Wind Turbine
71(1)
5.2 Whole Gearbox FE Model (WG-FEM) of Wind Turbine
72(1)
5.3 Modal Analysis of the Gearbox
73(4)
References
75(2)
6 Vibration Measurements of Wind Turbine Gearbox
77(14)
6.1 Bench Tests
77(2)
6.2 Operating Modal Tests
79(4)
6.3 Vibrations of On-site Tests
83(2)
6.4 Fault Diagnoses for Wind Turbine Gearbox Based on Vibration Measurements
85(6)
References
90(1)
7 Vibration Signal Analyses of Gearbox in Time-Domain, Frequency-Domain, and Time---Frequency Domain
91(26)
7.1 Structure Description and Measuring Method
91(2)
7.2 Vibration Measurements of Wind Turbine Gearbox
93(1)
7.3 Analysis of Vibration Signals of Gearbox Based on Time Domain
93(2)
7.4 Cross-Correlation Function Estimates of Vibration Signals
95(1)
7.5 Spectra Analysis of Vibration Signals of the Wind Turbine Gearbox
96(5)
7.6 Phase Analysis of Vibration Signals of Wind Turbine Gearbox
101(2)
7.6.1 Phase Analysis Based on Analytic Signal Theory with Hilbert Transform
101(2)
7.6.2 Results of Phase Analysis of Vibration Signals of Wind Turbine Gearbox
103(1)
7.7 Hilbert---Huang Transform Analysis of Vibration Signals of Wind Turbine Gearbox
103(14)
7.7.1 Basic Principle of Hilbert--Huang Transform Technique
106(8)
7.7.2 HHT Analysis of Vibrations of Wind Turbine Gearbox
114(2)
References
116(1)
8 Conclusions
117(2)
Appendix A Codes of Factor KA 119(38)
Appendix B Codes of Time-frequency Analysis of Vibration Signals 157(2)
Appendix C Codes of Hilbert-Huang Transform Analysis of Vibration Signals 159
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