随机风载下风电齿轮箱的系统动态可靠性研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (3) : 238-250.

故障诊断分析

随机风载下风电齿轮箱的系统动态可靠性研究

顾慧耘1，王宏伟*1，周建星1，费翔1，温建民1,2，房忠2

作者信息 +

System dynamic reliability of wind turbine gearbox under random wind load

GU Huiyun1, WANG Hongwei*1, ZHOU Jianxing1, FEI Xiang1, WEN Jianmin1,2, FANG Zhong2

Author information +

文章历史 +

摘要

风电齿轮箱在随机风载的作用下产生疲劳损伤，导致系统可靠性的降低。针对风电齿轮箱系统可靠性实时评估的问题，以2MW风电齿轮箱为研究对象，建立了齿轮箱传动系统动力学模型，统计动力学响应下各零件的疲劳应力，生成疲劳载荷谱。结合非线性疲劳损伤累积理论和核密度估计法，建立了考虑强度退化的应力-强度干涉模型，计算各零件失效模式的动态可靠度。进一步利用Copula函数构建了系统可靠性模型，分析零件的共因失效对齿轮箱系统可靠性退化的影响。结果表明：运行过程中齿轮箱的行星轮系和中速轴轴承的可靠度下降较快，其余零件的可靠度也呈下降趋势，说明服役初期的疲劳失效主要集中在行星轮系和中速轴轴承，其他零件在服役后期也会失效。齿轮箱的系统可靠度经过20年寿命周期预计降至约0.5880，结合零件的可靠度可实现风电齿轮箱的故障预警。

Abstract

The wind turbine gearbox experiences fatigue damage with random wind loads, reducing system reliability. This study focused on the 2MW wind turbine gearbox and established a dynamic transmission system model to assess real-time system reliability. Statistical analysis of component fatigue stresses under dynamic response generated fatigue load spectra. Integrating nonlinear fatigue damage accumulation theory and kernel density estimation method, we developed a stress-strength interference model that considered strength degradation to calculate the dynamic reliability of each component's failure modes. Furthermore, we constructed a system reliability model using Copula functions to analyze the effect of component's common-cause failure on the gearbox's system reliability degradation. The results indicate that the reliabilities of gearbox's epicyclic gear train and intermediate shaft bearings decrease rapidly during operation, while the reliabilities of other components also decline, suggesting early fatigue failures mainly occur on these two places with other components failing later. The system reliability of gearbox is expected to decrease to about 0.5880 over a 20-year lifespan, which provides early fault alert for wind turbine gearbox with the reliabilities of the components.

导出引用

顾慧耘1, 王宏伟1, 周建星1, 费翔1, 温建民1, 2, 房忠2. 随机风载下风电齿轮箱的系统动态可靠性研究[J]. 振动与冲击, 2025, 44(3): 238-250

GU Huiyun1, WANG Hongwei1, ZHOU Jianxing1, FEI Xiang1, WEN Jianmin1, 2, FANG Zhong2. System dynamic reliability of wind turbine gearbox under random wind load[J]. Journal of Vibration and Shock, 2025, 44(3): 238-250

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