万向节十字轴的强度与疲劳分析

Fatigue and Strength Analysis of Universal Joint Cross Shaft

针对某一公称转矩条件下的十字轴,提出了一种有限元分析方法,建立三种不同曲率半径过渡结构下的十字轴模型,利用有限元分析软件对其进行强度分析。在多柔体系统动力学理论的基础上,对十字轴式万向联轴器虚拟样机进行刚柔耦合仿真分析,得到十字轴的载荷谱,并对十字轴进行疲劳分析。仿真结果表明适度增大过渡结构的曲率半径可以提高十字轴强度并延长十字轴寿命。

A finite element designed method was proposed for the cross shaft on a certain nominal torque conditions. Three kinds of cross shaft model with different curvature radius transition structures were established, and the strength analysis was carried out by the finite element analysis software. Rigid-Flexible Coupling Simulation Analysis of Virtual Prototype of Cross-Shaft Universal Coupling was completed based on the dynamic theory of flexible multi-body system. The load spectrum of the cross shaft under the running condition of the vehicle was obtained, and the fatigue analysis of the cross shaft was carried out. The simulation results showed that the cross shaft strength can be improved by moderately increasing the radius of curvature of the transition structure.