基于乘用车操纵稳定性的子午线轮胎动态接地响应的研究

Research on Dynamic Ground Response of Radial Tire Based on Handling Stability of Passenger Cars

研究基于乘用车操纵稳定性的子午线轮胎动态接地响应。结果表明:随着车辆转向时车身侧向加速度增大,轮胎接地印痕包络轮廓由椭圆形向三角形过渡;当车身侧向加速度达到4 m·s^(-2)以上时,轮胎接地印痕长轴长度增大,但有效接地面积减小;轮胎带束层总宽度减小有利于提高侧向抓着性能,但易引起胎肩生热增大;以有效接地面积控制系数及其加权计分可以评估不同设计方案轮胎的侧向抓着性能,提高轮胎操控性能改善方案筛选效率,解决车辆操纵稳定性与轮胎抓着性能统筹优化问题。本研究可为轮胎配套过程中性能协同提升提供参考。

The dynamic ground response of the radial tire based on the handling stability of passenger cars was studied.The results showed that as the lateral acceleration of the vehicle body increased during the vehicle steering,the footprint envelope profile of the tire transitioned from an elliptical shape to a triangular shape,and when the lateral acceleration of the vehicle body reached 4 m·s-2 or more,the long axis length of the footprint of the tire increased,but the effective ground area decreased.The reduction in the total width of the tire belt layer was beneficial for improving the lateral grip performance,while causing an increase of the heat generation at the tire shoulder.The concept of the effective ground area control coefficient and its weighted calculation score was proposed,which could evaluate the lateral grip performance of the tires with different design schemes,improve the screening efficiencies of the handling performance improvement schemes of the tires,and address the issue of optimizing the vehicle handling stability and tire grip performance.The research results could provide a reference for the synergistic improvement of the performance of the tire during OE process.