航空发动机主轴承接触应力精确仿真计算方法

采用稳态热分析与动态接触力学分析相结合的方法以提高计算精度,考虑轴承摩擦生热及瞬态冲击效应的影响,得到经热应力修正的轴承应力分布及变化特征。研究表明:最大动态接触应力位于钢球表面,外圈滚道次之,内圈滚道最小；轴承接触应力具有明显动态冲击响应特性,分布及大小具有随机变化性；接触应力由主应力与剪切应力共同构成,随转速及轴向载荷增大而增大。 

Accurate simulation method for contact stress of aero-engine bearing

The combination of steady state thermal analysis and dynamic contact mechanics analysis was used to improve the calculation accuracy, and the stress distribution was corrected by thermal analysis, meanwhile the variation characteristics of the bearing were obtained. The research shows that, the maximum dynamic contact stress is located on the bearing ball surface, while the stress of the inner is the minimum. The contact stress of bearing has obvious dynamic response characteristics, while its distribution has a random variation. The contact stress, which increases with the rotational speed and the axial load, is composed of the principal stress and the shear stress.