驱动桥壳有限元分析模型的改进

Improvement of Driving Axle Housing FE Analysis Model

针对目前常用的驱动桥壳有限元分析模型中由于边界条件定义造成结果不准确的问题,在分析模型中引入了板簧的弹性特征,并按不同的边界条件对桥壳应力分布进行了计算。结果表明,按照传统约束方式计算,板簧座外侧桥壳应力高,板簧座内侧桥壳应力位于低;按新建立的边界条件计算,则高应力区将向板簧座内侧的桥壳扩展。测得弯曲及扭转工况下桥壳的应力结果表明,采用常用边界条件所得位于板簧座内侧的桥壳应力计算结果与实际相差接近50%;引入板簧元件后桥壳应力的计算结果则与试验结果相近。

To solve the defect of inaccuracy caused by boundary condition definition in the frequently-used driving axle housing finite element model, elastic characteristic of leaf spring is introduced to analysis model, and calculation is made to stress distribution of axle housing based on different boundary conditions. The results show that according to calculation with traditional restraint, the axle housing on the outside of the leaf spring seat has high stress, whereas axle housing on the inside has low stress; and according to calculation with the newly established boundary conditions, the high-stress area will extend to the inside of the leaf spring seat. The result of axle housing stress measured under bending and torsion conditions show that, with frequently-used boundary conditions, there is a difference of nearly 50% of the axle housing stress inside the leaf spring seat with actual axle housing stress; with the leaf spring elements, the calculation results of axle housing stress is similar to test results：