Coupling characteristics and test on dual-excitation for large wind turbine blade fatigue test

ZHANG Lei-an; WEI Xiu-ting; TAO Li-ming; HUANG Xue-mei

doi:10.3788/OPE.20162413.0503

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Coupling characteristics and test on dual-excitation for large wind turbine blade fatigue test

更新时间：2020-08-13

- Coupling characteristics and test on dual-excitation for large wind turbine blade fatigue test
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 503-510(2016)
- 作者机构：
  
  山东理工大学机械工程学院,山东淄博,255049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0503
  CLC： TH212
- Received：20 May 2016，
  
  Revised：17 June 2016，
  
  Published：14 November 2016
- 稿件说明：
移动端阅览
张磊安, 魏修亭, 陶黎明等. 大型风电叶片疲劳试验两点激振耦合特性及试验[J]. 光学精密工程, 2016,24(10s): 503-510

ZHANG Lei-an, WEI Xiu-ting, TAO Li-ming etc. Coupling characteristics and test on dual-excitation for large wind turbine blade fatigue test[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 503-510
张磊安, 魏修亭, 陶黎明等. 大型风电叶片疲劳试验两点激振耦合特性及试验[J]. 光学精密工程, 2016,24(10s): 503-510 DOI： 10.3788/OPE.20162413.0503.

ZHANG Lei-an, WEI Xiu-ting, TAO Li-ming etc. Coupling characteristics and test on dual-excitation for large wind turbine blade fatigue test[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 503-510 DOI： 10.3788/OPE.20162413.0503.

摘要

为了提高大型风电叶片疲劳测试的激振能力，设计了一套两点疲劳试验激振系统。首先，基于拉格朗日方程推导出风电叶片两点激振的动力学方程，并结合三相异步电机在两相静止坐标下的状态方程，联合构建风电叶片两点激振数学模型。然后，采用Matlab/Simulink软件建立仿真模型，数值模拟结果揭示了两个激振源在风电叶片疲劳振动过程中的机电耦合特性。最后，搭建了一套大型风电叶片全尺寸结构测试平台，试验结果表明：当激振源转速设定为40 rpm时（等效于叶片面向一阶频率），其转速和相位基本能保持相对稳定；当激振源转速设定为75 rpm时（等效于叶片弦向一阶频率），激振源的转速波动范围为2 rpm，相位角有不规则的波动，说明激振源的转速越快，转速、相位耦合程度越严重。试验结果与仿真结论基本吻合，即进行叶片疲劳加载试验时，弦向激振源的耦合程度大于面向，叶片要获得更好的同步激振效果需采用智能解耦控制算法。

Abstract

To improve shock excitation capacity of fatigue test of large-scale wind power blade

shock excitation system of two-point fatigue test is designed. Firstly

deduct kinetic equation of two-point shock excitation of wind power blade on the basis of Lagrange equation

and jointly construct mathematical model of two-point shock excitation of wind power blade by combining with state equation of three-phase asynchronous motor under two-phase static coordinate. Then establish simulation model by adopting Matlab/Simulink software

and numerical simulation result shows electromechanical coupling property of two shock excitation sources in the fatigue vibration process of wind power blade. Finally

a set of full-scale structural testing platform of large-scale wind power blade is constructed. Test result shows that when rotate speed of shock excitation source is set as 40rpm (being equivalent to first-order frequency in the direction of blade surface)

its rotate speed and phase can be kept relatively stable; when rotate speed of shock excitation source is set as 75rpm (being equivalent to first-order frequency in the choral direction of blade

fluctuation range of rotate speed of shock excitation source is 2rpm

and there is irregular fluctuation at phase angle

which shows that the faster the rotate speed of shock excitation source is

the severer the coupling degree between rotate speed and phase will be. Test result basically conforms to simulation result

and that is to say that when fatigue loading test of blade is performed

coupling degree of shock excitation source in the choral direction is greater than that of shock excitation source in the direction of surface. If better synchronous shock excitation effect of blade needs to be gained

intelligent decoupling control algorithm shall be adopted.

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references

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