摘要
Abstract
Traditional failure analysis methods struggle to quantify stress distribution under complex loads and cannot accurately predict the fracture location of automotive drive shafts.To address this,a fracture failure analysis and optimization method based on finite element simulation was proposed.First,the boundary conditions for failure analysis were defined according to different operating conditions,and force calculation and static strength check were performed on the failure section with the minimum diameter,revealing the contradiction between traditional theories and actual failures.Subsequently,through the combined modeling of UG and ANSYS,the critical speed analysis and modal calculation of the drive shaft assembly were completed.Aiming at the problem of fatigue fracture of the right spline caused by uneven torque distribution,an improvement scheme was proposed,which included reducing the diameter of the right optical shaft,adopting an arc transition shape,and optimizing key geometric parameters.Experimental results showed that this optimization method increased the average fatigue life of the test pieces to 85 424 cycles,an improvement of approximately 101%compared with the contrast method.This method significantly improves the reliability and service life of the drive shaft and provides an effective reference for the optimal design of similar structures.关键词
有限元仿真/汽车传动轴/断裂失效分析/优化模型Key words
finite element simulation/automobile drive shaft/fracture failure analysis/optimization model分类
交通工程
