基于典型工况的汽车后桥壳结构轻量化优化设计

基于典型工况下的后桥连接点载荷，运用惯性释放的方法对搭配多连杆悬架的后桥壳进行了轻量化设计。分析可知：单侧过深坑工况下的后桥壳应力最大；套管厚度和桥包厚度对最大应力有影响，而且随着两者厚度的变化，最大应力位置也会转移。优化后的桥壳比原桥壳减重11.6%，经过疲劳试验和耐久性路试验证，未出现耐久性问题，满足设计要求。

Light Weight Design of Automobile Rear Axle Housing Based on Typical Conditions

Lightweight design was done for the rear axle housing of multi-link rear suspension, based on typical conditions and the method of inertia release. According to the analyses, the maximal stress of the rear axle housing appeared on unilateral pothole condition. It indicated that the thickness of axle shaft sleeve and rear axle housing had an effect on maximal stress value as thickness changed,the maximum stress position would also shift. Finally, the optimized rear axle housing weight loss is of 11.6% compared to the original one, and no durability problems after fatigue tests and durability tests, the optimized rear axle housing can meet the design requirements.