汽车车轮结构强度分析  

STRUCTURE STRENGTH ANALYSIS OF AUTOMOTIVE WHEELS

作　　者：王霄锋[1] 王波[1] 赵震伟 管迪华[1] 

机构地区：[1]清华大学汽车工程系汽车安全与节能国家重点实验室,北京100084

出　　处：《机械强度》2002年第1期66-69,共4页Journal of Mechanical Strength

摘　　要：针对车轮动态弯曲疲劳试验建立了两种轿车车轮的静态线性有限元模型 ,它们可以有效地用来确定车轮结构的危险点 ,即结构中计算应力 (vonMises应力 )比较大的点。结构危险点的计算应力反映该处的应力集中程度。对车轮结构上计算应力较大的测点进行实验应力分析 ,验证有限元分析结果。对结构危险点的应力状态进行分析 ,有助于预测车轮疲劳裂纹的发生方向和引起疲劳损伤的主要应力循环 ,在所研究的车轮结构中也就是沿着车轮径向的正应力变程。分析还表明 ,在动态弯曲疲劳试验中 。The finite element models of two car wheels of different design are constructed based on the wheel dynamic cornering fatigue test. The models can be used to effectively determine the critical points in the wheel structure, that is, the points on which the calculated stresses (von Mises stresses) are large. And the calculated stresses with the model reflect the stress concentration on the critical points. The analysis results are proved by making experimental stress analysis on the structure critical points. The stress states on the structure critical points are analyzed, which is helpful in predicting the direction the fatigue crack initiates and the major cyclic loads causing the fatigue damage. The major cyclic loads are found to be the normal stress ranges in the radial direction of the wheel studied. The analysis also shows that the cyclic loads causing the fatigue damage of the wheel structure may be asymmetrical in the wheel dynamic cornering fatigue test.

关 键 词：汽车 车轮 有限元分析 疲劳 应力集中 

分 类 号：U463.3[机械工程—车辆工程]