车轮径向疲劳试验的动力显式有限元算法

DYNAMIC EXPLICIT FEM IN WHEELS RADIAL FATIGUE TEST

由于静力隐式有限元算法很难准确模拟车轮径向疲劳试验,着重研究用动力显式有限元算法进行模拟的方法。论文详细介绍了车轮有限元网格、材料性能参数、轮胎简化、螺栓预紧、焊缝设置、转鼓转动、径向力加载等过程的设置方法及注意事项,列出车轮应力及表面压力的分布,提出判断分析结果合理与否的方法,最后详细介绍材料S-N曲线的选择方法,并对有限元分析及试验寿命结果进行比较,该动力显式模拟设置方法可得到较理想的分析结果。

As the static implicit Finite Element Method（ FEM） is hard to simulate the wheels radial fatigue test accurately,this paper studies the simulated method with dynamic explicit FEM. It introduces the setting method of finite element,material performance parameter,tire,bolt pretention,weld,rotary drum,radial force,etc. It shown the distribution of stress and surface pressure of wheels,put forward a method to judge analysis result reasonable or not,and introduces the selection method of S-N curve for fatigue analysis. By comparing the FEA and test result,it knows that the dynamic explicit FEM setting method in this paper can get an idea analysis result.