摘要
转向节常因多轴载荷的反复冲击而产生疲劳裂纹或完全断裂,必须对其进行强度校核与疲劳寿命预测,但由于在新车型的研发初期无法获得作用在转向节上的真实载荷,即无法进行台架试验,所以如何利用CAE技术对其进行强度校核与疲劳寿命预测具有重要意义。该文选取越过不平路面、最小转向半径和紧急制动三种典型工况,对车轮进行受力分析;同时利用Adams/Car分别提取作用在转向节上的动、静载荷;然后利用Nastran对其进行静强度校核,FEMFAT对其进行多轴疲劳寿命预测。分析结果表明,该转向节满足静强度与疲劳强度设计要求。基于典型工况的载荷提取、强度与疲劳寿命预测,为及时发现转向节设计缺陷、优化性能提供了一种有效方法。
The steering knuckle will produce fatigue crack or complete crack due to the repeated impact of multi-axial loading, which is the important reason to check the static strength and predict the fatigue life of steering knuckle, h is unable to conduct bench tests because of the lacking of real loads of steering knuckle in the early stage of the development of new car models. So h is important to solve this problem by using of CAE technology. Three typical dangerous work conditions including run through rough road, minimal turning radius, emergence braking were considered and mechanical analysis of the wheels was conducted. At the same time, the static and dynamic loads were extracted by using of Adams/Car. Nastran was used to check the static strength and FEMFAT was used to predict the multi-axial fatigue life of steering knuckle. The result of finite element analysis indicates that the static strength and fatigue strength are satisfied. Load extraction, strength and fatigue life prediction based on typical work conditions provide an effective method for timely detecting design defects and optimizing performance of the steering knuckle.
出处
《机械设计与制造》
北大核心
2015年第4期39-43,共5页
Machinery Design & Manufacture
基金
辽宁省教育厅一般科技项目(L2012033)
关键词
转向节
静强度
多轴疲劳
Steering Knuckle
Static Strength
Multi-Axial Fatigue
