Abstract: Taking CA141 Jiefang truck as the research object, this paper establishes the 3D model of the drive axle housing with the software SolidWorks, and uses ANSYS software to conduct dynamic analysis of the drive axle housing. Firstly, the vibration frequencies of each order are obtained through modal analysis. The frequencies of the first six vibration modes of the axle housing structure in the constrained mode are not in the range of 0～50 Hz, and the axle housing will not produce resonance in the normal operation process. Then, based on the modal analysis, the transient dynamic analysis and random vibration analysis of the axle housing are conducted. It is found that the maximum equivalent stress and strain are located near the leaf spring seat of the axle housing, and at the same time show a positive correlation trend with the change of load, and the maximum shear stress and directional acceleration also show a regular decreasing or periodic change, which provides a more perfect theoretical reference for the optimal design and research of the axle housing.

Key words: Drive axle housing; Transient dynamics; Random vibration; Workbench; Heavy truck

摘要： 文章以 CA141 解放牌汽车为研究对象，基于 SolidWorks 软件对驱动桥壳建立三维模型 后，利用 ANSYS 软件对驱动桥壳进行动力学分析。首先通过模态分析得到各阶的振动频率， 桥壳结构在约束模态下的前六阶振型的频率不在 0～50 Hz，桥壳在正常运行过程中不会产生 共振；然后在模态分析的基础上对桥壳进行瞬态动力学分析、随机振动分析发现，最大等效 应力与应变均位于桥壳的板簧座附近，同时与载荷的变化呈现正相关的趋势，最大剪切应力 与定向加速度也相应呈现规律的递减或周期性变化，从而为桥壳的优化设计和研究提供了更 完善的理论参考依据。

关键词: 驱动桥壳；瞬态动力学；随机振动；Workbench；重型载货汽车