控制臂的受力分析与改进

Analysis and Improvement of Control Arm

为了提高悬架系统的综合性能,对自主研发的电动汽车悬架控制臂进行了分析与改进。首先,建立控制臂的三维模型并通过ADAMS提取控制臂3个铰接点的受力作为边界条件,并利用ANSYS对控制臂进行了有限元分析,得到了其变形和应力云图;其次,改进现有控制臂的几何形状以减小控制臂的峰值应力和峰值位移;最后,对改进前后的控制臂进行了对比分析。结果表明,改进后的控制臂峰值应力减少6.209MPa,峰值位移减少0.015 257mm,进一步保障了悬架系统的安全性,为悬架控制臂的结构改进提供了一定的参考依据。

In order to improve the overall performance of the suspension system, the suspension control arm of a homemade electric vehicle is analyzed and improved in this paper. Firstly, a three-dimensional model is built and the stress conditions of the three hinge points in the control arm are extracted by ADAMS and considered as boundary conditions; the nephograms of deformation and stress are obtained by finite element analysis with ANSYS. Secondly, the existing control arm geometry is improved to reduce the peak stress and peak displacement of the control arm. Finally, the comparisons are made before and after the improvement of the control arm. The results show the peak stress and peak displacement of the control arm show reduction of 6. 209 MPa and 0. 015 257 mm respectively. This study enhances the stability of the suspension system, and provides a reliable reference for the improvement of suspension control arm.