【摘要】 利用风机仿真软件(SWT),对某1.5 MW双馈式风力发电机齿轮箱的动态特性进行了研究。应用梁单元和超单元建立了齿轮箱参数化模型,对其进行了模态分析,将得到的固有频率与激励频率比较,确定不存在共振点;在考虑风剪切效应和塔影效应的基础上,建立了风机整机全耦合模型,得到了正常发电和紧急停机工况条件下齿轮箱系统的动态响应、齿轮啮合力和轴承受力情况。研究结果表明,风机齿轮箱的动态响应及动态载荷与其运行工况和外部风载荷密切相关,且各级齿轮的动态啮合力与齿轮轴的转矩有相同的变化趋势;行星轮轴承所受载荷最大,更容易发生损坏。研究结果为风力发电机齿轮箱传动系统的动态优化设计提供了理论依据。更多还原

【Abstract】 By using the simulation software Samcef for Wind Turbine(SWT),the dynamic characteristics of the gearbox of a 1.5MW doubly-fed wind turbine was studied.With the application of beam element and superelement in SWT,parameterized model of gearbox was built,and the modal analysis was carried out.By comparing the inherent frequency and excitation frequency,conclusion was that there was no resonance point.Besides,the coupling model of wind turbine was built with the consideration of the shear effect and shadow effect.The dynamic response,gear meshing force and bearing force of the gearbox system under working condition of power generation and emergency stop were obtained.Results showed that the dynamic response and dynamic load of the gearbox are closely related to the wind load and its working condition.And the dynamic meshing force of gears and the torque of corresponding gear shaft have the same change trend.Moreover,planet gear bearings bear the largest load and are more likely to suffer damage.The results provide a theoretical basis for dynamic optimization design of gear transmission system in wind turbines.更多还原