风力机主轴承刚柔多体接触动力学动态特性分析

为揭示多动态参数激励下兆瓦级风力机主轴承的动态特性,考虑空间柔性机构大范围运动与弹性体自身小范围变形的影响,对主轴承进行参数化分析并联合动载荷作用下的动力学方程进行数值求解。以兆瓦级风力机主轴承为研究对象,建立刚柔多体接触模型,进行仿真并验证模型的正确性与可靠性。结果表明:通过分析主轴承刚柔多体接触动力学特性,可得到风力机运转过程中主轴承各部件之间的动态响应特性、不同工况下柔性体的接触力变化规律以及阵风阶段内圈的受力危险位置。研究结果为风力机主轴承的结构优化提供参考。

Dynamic Characteristics Analysis of Rigid Flexible Multi-body Contact Dynamics of Main Bearing of Wind Turbine

In order to reveal the dynamic characteristics of the main bearing of megawatt wind turbine under the excitation of multiple dynamic parameters, the influences of the large range movement of the space flexible mechanism and the small range deformation of the elastomer itself on the main bearing were considered, the main bearing parametric analysis was carried out, and the dynamic equation under dynamic load was numerically solved. Taking the main bearing of megawatt wind turbine as the research object, a rigid flexible multi-body contact model was established to simulate and verify the correctness and reliability of the model. The results show that by analyzing the rigid flexible multi-body contact dynamic characteristics of the main bearing, the dynamic response characteristics between the components of the main bearing during the operation of the wind turbine, the contact force variation rule of the flexible body under different working conditions and the stress danger position of the inner ring in the gust stage can be obtained. The research results provide reference for structural optimization of main bearing of wind turbine.