基于Workbench的汽车轮毂强度分析与疲劳寿命预测

Strength Analysis and Fatigue Life Prediction of Automotive Wheel Hubs Based on Workbench

汽车轮毂作为汽车行驶中不可或缺的重要部件,其可靠性将直接影响汽车的行驶安全。文章采用《乘用车车轮弯曲和径向疲劳性能要求及试验方法》(GB/T 5534—2021)结合仿真模拟对某车型的轮毂18×10J进行了静力学分析和疲劳寿命预测,将动态的载荷进行分解转化为静态载荷,采用多个载荷序列来模拟轮毂疲劳弯曲试验的一个循环周期,经求得轮毂的最低疲劳寿命1.78×10^(6)次远大于铝合金材料强化系数为1.6的最低循环次数。虽发现轮辐螺母座处出现应力集中区域,导致该区域寿命较短,但符合当前的设计要求,在往后的轮毂优化中可进行优化设计。

As an indispensable and important component in car operation,the reliability of car wheels will directly affect the driving safety of the car.The article uses Performance Requirements and Test Methods for Passenger Car Wheels(GB/T 5534-2015)combined with simulation to conduct static analysis and fatigue life prediction on the 18×10J wheel hub of a certain vehicle model.The dynamic load is decomposed into static load,and multiple load sequences are use to simulate one cycle of wheel fatigue bending test.The minimum fatigue life of the wheel hub is found to be 1.78×10^(6) times,which is much greater than the minimum cycle number of aluminum alloy material strengthening coefficient 1.6.It is found that there is a stress concentration area at the hub nut seat,resulting in a shorter lifespan in this area,but it meets the current design requirements.Optimization design can be carried out in future hub optimizations.