变载荷下风力发电机行星齿轮传动系统齿轮-轴承耦合动力学特性

根据风力发电机传动系统在随机风场中复杂变工况的工作特点，建立了最小二乘支持向量机风场随机风速模型，获得了由随机风速引起的时变风载荷。采用集中质量参数法建立了风力发电机行星齿轮传动系统中齿轮滚动轴承耦合动力学模型，考虑了风力发电机行星齿轮传动的变风载输入、齿轮时变啮合刚度和滚动轴承时变刚度等影响因素，对变风速下1.5 MW半直驱风力发电机行星齿轮传动系统的动力学特性进行了仿真计算分析，求得了变风速下行星齿轮传动系统的振动位移、各齿轮副的动态啮合力和非线性动态轴承力，为风力发电机传动系统的动态性能优化和可靠性设计奠定了基础。

Gear-bearing coupling dynamics characteristics of wind turbine planetary gear transmission system under variable load

Considering that the transmission system of wind turbine works in complex and changing load environment caused by stochastic wind speed,this paper uses sparse least squares support vector machine(SL-SVM) to simulate wind speed of true wind field,and obtains time-varying wind load caused by stochastic wind speed. The lumped-parameter method is used to develop a dynamic model of planetary gear transmission system of wind turbine coupled with bearing. The model includes the varying wind load,time-vary mesh stiffness of gear pair and time-vary stiffness of rolling element bearing. The numerical method is used to simulate the dynamic performance of planetary gear system of Multibrid Technology Wind Turbine with 1.5 MW rated power. The vibration displacement responses of the transmission system are obtained as well as dynamic meshing force each pair of gear and nonlinear bearing forces. The research can provide a foundation for optimizing dynamic performance and reliable design of gear transmission system of wind generator.