论文部分内容阅读
以某乘用车驱动桥壳为例,根据减薄后桥壳在台架试验时发生断裂失效的情况,建立了桥壳的有限元模型,并进行静力学分析和疲劳分析,得出在钢板弹簧座附近应力出现集中。提出了在钢板弹簧座附近位置添加衬环的方法,并基于二次响应曲面法进行了优化设计,确定衬环厚度为6 mm、长度为80 mm、安装位置为距桥壳片外端部90 mm时响应值最小。轻量化前后桥质量减轻了3.2 kg,减轻约为14.2%,效果明显。通过对比桥壳改进前后的有限元分析得出:添加衬环后驱动桥壳应力明显降低,安全系数提高显著,并通过台架试验验证了改进措施的正确性和有效性。
Taking the case of a passenger car driven axle shell as an example, the finite element model of the axle shell was established according to the failure failure of the axle shell after the thinning test on the bench. Static analysis and fatigue analysis were carried out, Spring near the seat stress concentration. The method of adding lining ring in the position near the leaf spring seat is proposed and the optimal design is based on the secondary response surface method. The thickness of the lining ring is 6 mm and the length is 80 mm. The installation position is from the outer end 90 mm minimum response time. Lightweight bridge before and after reducing the quality of 3.2 kg, reducing about 14.2%, the effect is obvious. By comparing the finite element analysis before and after the improvement of the axle housing, the stress of the axle housing is obviously reduced after the lining ring is added, the safety coefficient increases significantly, and the correctness and effectiveness of the improvement measures are verified by the bench test.