基于Radioss的变速器倒挡齿轮动态有限元分析

Radioss-Based Dynamic Finite Element Analysis of Transmission Reverse Gear

为研究变速器倒挡齿轮的疲劳失效,针对某变速器倒挡齿轮进行了动态有限元分析。建立变速器倒挡齿轮的有限元模型,分析倒挡齿轮工作特性,确定了齿轮约束和加载方式,利用Radioss求解器计算倒挡齿轮啮合过程的接触应力,得到任意时刻的接触应力及最大接触应力所在位置,同时进行了接触应力的理论计算。研究表明,倒挡齿轮间的接触应力远小于材料的接触疲劳极限,倒挡齿轮接触强度符合设计要求。

Dynamic finite element analysis had been carried out to study the fatigue failure of the transmission reverse gear. In the finite element model,the constraintsand load were determined by the operating characteristics of the reverse gear. Based on Radioss solver, the contact stress in gear meshing process was calculated.The contact stress history and the maximum contact stress location were determined.The theoretical calculation of the contact stress was also achieved.The study shows that the contact stress of the reverse gear is much smaller than the contact fatigue limit of the material,and the reverse gear contact strength meets the design requirements.