关键词: 前摆臂；屈曲；（超）高强钢；单片式；有限元分析

Abstract: As an important part of Mcpherson front suspension, the front lower arm plays an important role. Its structure not only meets the strength requirements, but also bears certain buckling performance, which needs to destroy bending ahead of time to protect the sub-frame, (super) high strength steel and single-chip front lower arm has become the mainstream structure of industry development. In this paper, the buckling performance requirements, buckling analysis process, analysis method and working conditions of the front lower arm are introduced, and take the front lower arm of a developed vehicle as an example, the finite element model of the front lower arm is established by HyperMesh, and the buckling calculation is carried out in ABAQUS, a series of buckling optimization methods are summarized, and the calculation results show that the optimization method is effective and has important guidance for the design of front lower arm buckling.

Key words: Front lower arm; Buckling; (Super) High strength steel; Single-chip; Finite element analysis