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针对风力发电机齿轮传动系统在变风速工况下失效率高的问题,在模拟真实风速的基础上,建立考虑外部随机风载及内部轮齿时变啮合刚度、轴承时变刚度及综合传递误差等激励因素的风力发电机齿轮传动系统齿轮)轴承耦合动力学模型,通过对动力学模型进行仿真计算,得到各齿轮副的动态啮合力和各支承轴承的动态接触力。在此基础上,利用有限单元法、赫兹接触理论和数理统计理论得到了传动系统各齿轮和各支承轴承的动态接触力的概率分布,基于应力)强度干涉理论建立风力发电机齿轮传动系统关键零部件的模糊可靠性模型,并计算了关键零部件及系统的模糊可靠度。
Aiming at the problem of high failure rate of wind turbine gear transmission system under variable wind speed conditions, based on the simulation of real wind speed, the time-varying meshing stiffness, the time-dependent stiffness of the bearing and the integrated transmission error And other exciting factors of wind turbine gear transmission system gear) bearing coupling dynamic model, through the simulation of dynamic model to obtain the dynamic meshing force of each gear pair and each bearing dynamic contact force. On this basis, using the finite element method, the Hertzian contact theory and the mathematical statistics theory, the dynamic contact force distribution between each gear and each bearing of the transmission system is obtained. Based on the stress intensity interference theory, the key zero Component fuzzy reliability model, and calculates the fuzzy reliability of key components and systems.