基于橡胶路面有限元分析的路面形貌摩擦学设计  

Tribological design of road surface based on finite element analysis about rubber friction

作　　者：朱永刚[1] ZHU Yonggang(School of Mechanical Engineering,Anhui Sanlian College,Hefei 230601,China)

机构地区：[1]安徽三联学院机械工程学院,安徽合肥230601

出　　处：《弹性体》2022年第5期33-40,共8页China Elastomerics

基　　金：国家自然科学基金项目(U20A20315);安徽省教育厅高校自然科学研究项目(KJ2020A0812);省级创新训练项目(201810959049);安徽省高校质量工程项目(2020jyxm0553)。

摘　　要：路面结构的良好摩擦学性能是安全行车的基础,基于轮胎路面摩擦理论的路面形貌设计,是车辆路面摩擦力控制从被动向主动的转变节点,是车辆安全行驶主动防御的关键一环。建立橡胶路面摩擦模型,采用ANSYS有限元分析手段,考虑到橡胶的黏弹性,得到橡胶应力应变场图、摩擦力、正压力及摩擦系数,通过计算不同路面结构尺寸下摩擦系数的分布规律,为路面结构形貌设计提供参数,从理论上揭示刻槽路面防滑机理的本质,并设计出摩擦效率高且施工方便的路面形貌。结果表明,路面橡胶摩擦的静摩擦与动摩擦两个阶段的摩擦系数变化趋势完全相反,静摩擦越来越小,动摩擦越来越大并趋于一个极限值;载荷量相同时,路面凸峰半径大摩擦系数也大;路面凸峰嵌入量相同时,凸峰尺寸大摩擦系数小;双凸峰能获得更大的摩擦力与摩擦系数;双峰间距大于凸峰半径之和时,橡胶对地面能获得优良的摩擦力与摩擦系数。Good tribological performance of road structure is the basis of safe driving.The design of road surface topography based on the tire road friction theory is the transition node of vehicle road friction control from the passive to the active,and a key link of the active defense of vehicle safe driving.The friction model of rubber pavement is established,and the stress-strain field diagram,friction force,positive pressure and friction coefficient of rubber are obtained by using the ANSYS finite element analysis method,while the viscoelasticity of rubber is considered.By calculating the distribution law of the friction coefficient of the different pavement structure sizes,the parameters are provided for the design of the pavement structure topography,and the essence of anti-skid mechanism of groovelled pavement is theoretically revealed.The pavement shape with high friction efficiency and convenient construction is designed.The results show that two friction coefficients have an opposite variation trend,while static friction is getting smaller,the dynamic friction becomes larger and larger and tends to a limit value.When the load is same,the friction coefficient increases with the size of convex peak radius increasing.When the embedding amount of convex peak is the same,and the friction coefficient will reduce with the size of convex peak increasing.Double convex peaks can produce greater friction and friction coefficient.When the distance between two peaks is greater than the sum of the radius of convex peaks,the rubber can obtain excellent friction and friction coefficient on the ground.

关 键 词：路面设计 刻槽 轮胎路面 微观变形 黏弹性摩擦 

分 类 号：TQ330.1[化学工程—橡胶工业] O313.5[理学—一般力学与力学基础]