基于HyperWorks的货车前轴有限元分析及疲劳强度分析
Based on the Truck Front Axle HyperWorks Finite Element Analysis and Fatigue Strength Analysis

汽车前轴是底盘系统的重要组成部分，其强度直接影响整车的安全性和可靠性。在HyperWorks建立材料为40 Cr，单元类型为四面体的前轴有限元模型。选取三种典型工况：越过不平整路面工况、紧急制动工况、侧滑工况，在板簧座施加静态载荷，在主销孔处施加约束，对前轴进行静强度分析，得出三种工况下的位移云图及应力云图。并在此基础上对疲劳寿命进行了预估。结果表明，前轴在三种典型工况下最大应力均未超过材料屈服极限，最低疲劳寿命为62万公里，满足疲劳寿命的要求，验证了设计的合理性。
The front axle is an important part of the chassis system, and its strength directly affects the safety and reliability of the vehicle. The finite element model of front axle with material of 40 Cr and ele-ment type of tetrahedron was established in HyperWorks. Three typical working conditions are se-lected: crossing uneven pavement condition, emergency braking condition and side slip condition. Static load is applied to the leaf spring seat, and constraints are applied to the main pin hole. The static strength analysis of the front axle is carried out, and the displacement cloud diagram and stress cloud diagram under three working conditions are obtained. On this basis, the fatigue life is estimated. The results show that the maximum stress of the front axle under three typical working conditions does not exceed the yield limit of the material, and the minimum fatigue life is 620,000 km, which meets the requirements of fatigue life and verifies the rationality of the design.