对接路面轮胎瞬态侧偏特性研究  

Tire Transient Cornering Characteristics on μ-step Road

作　　者：陈平[1] 许男[1] 白帆 郭孔辉[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]上汽通用五菱汽车股份有限公司,柳州545007

出　　处：《机械工程学报》2017年第22期143-151,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51405185;51675217);中国汽车产业创新发展联合基金(U1564213);中国博士后科学基金(2016T90250);广东省省级科技计划(2013B090400002)资助项目

摘　　要：对接路面轮胎瞬态侧偏特性对于车辆方向稳定性至关重要。通过仿真与试验的手段研究对接路面轮胎瞬态侧偏特性及其机理。建立用于对接路面轮胎瞬态侧偏特性仿真的轮胎模型,通过考虑胎体复杂弹性变形,并将印迹区域内胎面单元离散处理,得到轮胎滚动过程中胎面单元的变形特性,推导出基于胎面变形的轮胎力和力矩的一般表达式。利用高-低附对接路面台架试验数据对模型进行了验证。通过仿真研究对接路面轮胎瞬态侧向力和回正力矩特性,深入分析对接路面轮胎瞬态侧偏力学特性机理以及轮胎胎体弹性、轮胎侧偏角和摩擦因数阶跃幅值对这一特性的影响。分析结果表明,胎体侧向平移刚度对侧向力松弛特性影响很显著。胎体平移刚度越大,侧向力松弛长度越短。研究工作有助于对接路面工况轮胎瞬态特性半经验建模以及车辆在对接路面上的方向稳定性分析和相关控制策略开发。Tire transient cornering characteristics on μ-step road is vital to vehicle directional stability and analyzed through simulation and test in this paper. Firstly, a tire model is derived using for tire transient cornering characteristics simulation on μ-step road. The tire tread deformation characteristics during motion are descripted with details by discretizing the tread elements at the contact zone and considering the complex deformation of the carcass. And the general expressions of the tire force with respect to the tread deflection are deduced, such that the tire force could be calculated from arbitrary tread deflection. Subsequently, the model is verified by tire transient cornering characteristics test data on μ-step road. Finally, the tire transient lateral force and aligning moment characteristics are simulated and analyzed by utilizing the transient tire model. Meanwhile, the underlying fundamental understanding of tire transient cornering characteristics on μ-step road is revealed. And the influence of tire carcass stiffness, slip angle and μ-step amplitude on tire transient characteristics is also presented. Analysis results reveal that the lateral translation stiffness of the carcass plays a significant influence on the tire lateral force relaxation length. The lateral force relaxation length is decreasing as the increasing of the lateral translation stiffness. This study would be beneficial to tire transient characteristics semi-empirical modeling and vehicle directional stability analysis and relative control strategy development on μ-step road.

关 键 词：轮胎特性 瞬态 侧偏 对接路面 轮胎建模 

分 类 号：U461[机械工程—车辆工程]