独立悬架汽车转向系多极限环自激摆振研究  

Study on Self-excited Shimmy of Multiple Limit Cycles in Vehicle Steering System with Independent Suspension

作　　者：张强强[1] 景少妮 

机构地区：[1]合肥工业大学汽车与交通工程学院,安徽省合肥市230009 [2]湖南三一快而居住宅工业有限公司,湖南省长沙市410100

出　　处：《农业装备与车辆工程》2017年第6期6-11,共6页Agricultural Equipment & Vehicle Engineering

基　　金：国家自然科学基金资助项目(51375130);吉利汽车研究院开放基金项目(2009E10013)

摘　　要：针对汽车转向轮摆振引起的转向系振动,以某国产独立悬架汽车为原型,运用拉格朗日方程建立转向摆振系统六自由度模型。摆振系统模型中选用魔术公式轮胎模型以及滞后环干摩擦模型,运用数值方法分析转向系横向刚度和阻尼对摆振特性的影响。结果表明,随横向刚度和阻尼的增大,单极限环区间逐渐缩小直至消失,多极限环区间逐渐扩大,但是整个摆振区间缩小,并且各自由度摆振峰值减小。研究结果为减小汽车多极限环自激摆振提供了理论参考。Aiming at the steering vibration induced by automobile steering wheel shimmy, with a domestic car with independent suspension chosen as the prototype, a 6-DOF model for the steering system was established based on Lagrange equation. Magic e- quation and Stefanski-Wojewoda dynamic model were chosen as the tire force model and dry friction model. The influence of later- al stiffness and damping on the vibration characteristics of the steering system was analyzed by numerical method. The results show that, with the increase of lateral stiffness and damping, the single-limit cycle section gradually decreases to disappear, and the multi-limit cycles section gradually expands, but the whole shimmy interval decreases and the peak of each degree of freedom de- creases. The study result is helpful to provide theoretical reference for reducing vehicle shimmy with multiple hmit cycles.

关 键 词：转向轮 独立悬架 横向刚度和阻尼 摆振 多极限环 

分 类 号：U463.4[机械工程—车辆工程]