Dynamic analysis of a megawatt wind turbine drive train

2015 ◽  
Vol 29 (5) ◽  
pp. 1913-1919 ◽  
Author(s):  
Caichao Zhu ◽  
Shuang Chen ◽  
Chaosheng Song ◽  
Huaiju Liu ◽  
Houyi Bai ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Wind Turbine ◽  
Drive Train ◽  
Turbine Drive

Dynamic analysis of wind turbine drive train subjected to nonstationary wind load excitation

2014 ◽  
Vol 229 (3) ◽  
pp. 429-446 ◽  
Author(s):  
P Srikanth ◽  
AS Sekhar
Keyword(s):  
Dynamic Analysis ◽  
Wind Turbine ◽  
Dynamic Model ◽  
Gear Tooth ◽  
Wind Load ◽  
Drive Train ◽  
Applied Torque ◽  
Frequency Domains ◽  
Turbine Drive ◽  
Time And Frequency Domains

The dynamic analysis of wind turbine drive train is presented in this paper. A typical wind turbine drive train consists of a rotor, gearbox and generator. The dynamic modelling of epicyclic gearbox that exists in wind turbine is challenging due to the fact that it has both rotating and orbiting gears. The dynamic equations of motion are obtained based on the rigid multibody modelling with discrete flexibility approach by Lagrange’s formulation. The dynamic model accounts for the time varying gear tooth mesh stiffness, linear stiffness of bearings and torsional shaft stiffness. The aerodynamic torque that a wind turbine drive train subjected to, is modelled based on the simplified method for load calculation in wind turbine, Danish Standard DS472. The characteristic load value acting per unit length at the two-thirds length of the blade is used for calculating the total load of the torsional moment. The vibration signals that are obtained from wind turbine drive train are nonlinear and nonstationary in nature. This is due to the fact that the applied torque load on drive train is nonlinear and nonstationary in nature. The coupled dynamic model of 18 degrees of freedom is solved for responses in time and frequency domains for some nonstationary wind load realizations. The dynamic responses of the system, contact forces between gear tooth pairs in time and frequency domains are obtained numerically. The study envisages that this dynamic model of wind turbine drive train is very useful for subsequent studies on condition monitoring.

Dynamic analysis of the drive train of a wind turbine based upon the measured load spectrum

2014 ◽  
Vol 28 (6) ◽  
pp. 2033-2040 ◽  
Author(s):  
Caichao Zhu ◽  
Shuang Chen ◽  
Huaiju Liu ◽  
Huaqing Huang ◽  
Guangfu Li ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Wind Turbine ◽  
Drive Train ◽  
Load Spectrum ◽  
Measured Load

A study of mechanical torque measurement on the wind turbine drive train-ways and feasibilities

Wind Energy ◽  
2018 ◽  
Vol 21 (12) ◽  
pp. 1406-1422 ◽  
Author(s):  
Hongkun Zhang ◽  
Rubén Ortiz de Luna ◽  
Martin Pilas ◽  
Jan Wenske
Keyword(s):  
Wind Turbine ◽  
Drive Train ◽  
Torque Measurement ◽  
Turbine Drive

scholarly journals Multibody dynamic modelling of a direct wind turbine drive train

2019 ◽  
Vol 44 (5) ◽  
pp. 519-547
Author(s):  
Saeed Asadi ◽  
Håkan Johansson
Keyword(s):  
Wind Turbine ◽  
Measurement Data ◽  
Dynamic Modelling ◽  
Simulation Software ◽  
Operating Conditions ◽  
Drive Train ◽  
Operational Experience ◽  
Main Bearing ◽  
Wide Range ◽  
Turbine Drive

Wind turbines normally have a long operational lifetime and experience a wide range of operating conditions. A representative set of these conditions is considered as part of a design process, as codified in standards. However, operational experience shows that failures occur more frequently than expected, the costlier of these including failures in the main bearings and gearbox. As modern turbines are equipped with sophisticated online systems, an important task is to evaluate the drive train dynamics from online measurement data. In particular, internal forces leading to fatigue can only be determined indirectly from other locations’ sensors. In this contribution, a direct wind turbine drive train is modelled using the floating frame of reference formulation for a flexible multibody dynamics system. The purpose is to evaluate drive train response based on blade root forces and bedplate motions. The dynamic response is evaluated in terms of main shaft deformation and main bearing forces under different wind conditions. The model was found to correspond well to a commercial wind turbine system simulation software (ViDyn).

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