Abstract: The leaf spring is a mechanical system with coupling of contact nonlinearity and large deformation nonlinearity. Based on the strong nonlinear solver of Abaqus-CAE, this paper reproduces the road test cracking problem of the leaf spring rear axle system via simulation. The results show that the quasi-static simulation analysis of the finite element model of the leaf spring rear axle system under the deep pit condition yields results highly consistent with the actual road test performance; by optimizing the length and fitting clearance of the auxiliary spring, the stress of the leaf spring is reduced by 33%. This method can effectively simulate the structural stress distribution characteristics of leaf springs, providing a rapid and effective analytical approach for the structural design of leaf springs.

Key words: leaf spring; quasi-static conditions; Abaqus nonlinear analysis; system simulation

摘要： 钢板弹簧为接触非线性与大变形非线性耦合的力学系统，文章基于 Abaqus-CAE 强非 线性求解器，对板簧后桥系统路试开裂问题进行了仿真复现。结果表明，对板簧式后桥系统 有限元模型开展深坑工况准静态仿真分析，所得结果与路试实际表现高度吻合；通过优化副 簧长度及贴合间隙，板簧应力降幅达到 33%。该方法可有效仿真板簧结构应力分布特征，为 板簧结构设计提供了快速、有效的分析手段。

关键词: 钢板弹簧；准静态工况；Abaqus 非线性分析；系统仿真