Fatigue Strength Analysis of Cracked Wind Turbine Planetary Gear Train Under Variable Load Excitation

Ben Chen; Shijing Wu; Pan Zheng; Jun Wang; Qiang Chen; Sujie Gao; Jianhua Zhou

doi:10.16578/j.issn.1004.2539.2022.06.003

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Fatigue Strength Analysis of Cracked Wind Turbine Planetary Gear Train Under Variable Load Excitation

Theory·Reserach | 更新时间：2022-10-04

- Fatigue Strength Analysis of Cracked Wind Turbine Planetary Gear Train Under Variable Load Excitation
- Journal of Mechanical Transmission Vol. 46, Issue 6, Pages: 15-22(2022)
- 作者机构：
  
  1.武汉大学动力与机械学院，湖北武汉 430072
  2.国家能源集团云南新能源有限公司，云南昆明 650214
  3.山东银鹰化纤有限公司，山东高密 261500
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2022.06.003
  CLC：
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陈奔,巫世晶,郑攀等.变载荷激励下含裂纹风电行星轮系疲劳强度分析[J].机械传动,2022,46(06):15-22.

Chen Ben,Wu Shijing,Zheng Pan,et al.Fatigue Strength Analysis of Cracked Wind Turbine Planetary Gear Train Under Variable Load Excitation[J].Journal of Mechanical Transmission,2022,46(06):15-22.
陈奔,巫世晶,郑攀等.变载荷激励下含裂纹风电行星轮系疲劳强度分析[J].机械传动,2022,46(06):15-22. DOI： 10.16578/j.issn.1004.2539.2022.06.003.

Chen Ben,Wu Shijing,Zheng Pan,et al.Fatigue Strength Analysis of Cracked Wind Turbine Planetary Gear Train Under Variable Load Excitation[J].Journal of Mechanical Transmission,2022,46(06):15-22. DOI： 10.16578/j.issn.1004.2539.2022.06.003.

摘要

随机风载引起的外部激励会极大地影响风电传动系统的疲劳寿命。利用考虑尾流效应的四分量模型模拟风电场随机风速，结合有限元法分析得到风电行星轮系的疲劳寿命。在此基础上，基于子模型法研究了太阳轮单齿和双齿根裂纹深度、长度和延伸角对风电行星轮系疲劳强度的影响。最终发现裂纹尺寸参数对风电行星轮系疲劳寿命的影响程度为：裂纹深度>裂纹长度>裂纹延伸角。双齿根裂纹对疲劳寿命的影响远大于单齿根裂纹的影响，且双齿根裂纹状态下先啮入齿的疲劳寿命远小于单齿根裂纹状态，后啮入齿疲劳寿命略大于单齿根裂纹状态。相关研究为优化风机服役性能提供了理论依据。

Abstract

The external excitation caused by random wind load can greatly affect the fatigue life of the wind power transmission system. A four-component model considering the wake effect is used to simulate the random wind speed of a wind farm， and combined with the finite element method， the fatigue life of the wind power planetary gear train is obtained. On this basis， the influence of the depth， length and extension angle of the sun gear single-tooth and double-tooth root cracks on the fatigue strength of wind power planetary gear trains is studied based on the sub-model method. Finally， it is found that the influence degree of the crack size parameters on the fatigue life of the wind power planetary gear train is: crack depth> crack length> crack extension angle. The effect of double root cracks on fatigue life is much greater than that of single root cracks， the fatigue life of the first-engaged tooth in the double-root crack state is much shorter than that of the single-root crack state， and the fatigue life of the later-engaged tooth is slightly larger than that of a single-tooth root crack state. Related research provides a theoretical basis for optimizing the service performance of wind turbines.

关键词

四分量组合模型疲劳强度齿根裂纹子模型法

Keywords

Four-component combination modelFatigue strengthTooth root crackSub-model method

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