基于有限元法的半轴强度和疲劳寿命计算

Stress analysis and fatigue life calculation of transmission shaft based on FEM

传统的根据经验公式校核半轴强度的方法存在计算时间长、计算精度低等缺点,利用有限元法可方便的在半轴三维建模、有限元网格划分的基础上进行半轴强度分析,同时可在强度分析的基础上进行半轴寿命的计算。通过建立半轴的三维模型,划分网格,在有限元的理论基础上对半轴进行强度校核,同时结合有限疲劳寿命设计理论进行疲劳寿命的计算,得出汽车半轴的应力和使用疲劳寿命。

Traditional method of analyzing car＇s transmission shaft has several disadvantages, such as long calculating time and low analysing precision. The finite element method （ FEM ） can be easily used to analyse the stress of transmission shaft on the basis of CAD model. In this paper, the stress of transmission shaft is analysed by using FEM, then the fatigue llfe of the shaft is calculated accroding to limited life theory.