路面抗滑性能影响弯道行车安全的仿真分析

为研究车辆制动工况下路面抗滑性能对弯道行车安全的影响,以车辆动力学分析软件AD-AMS为仿真平台,提出采用轮胎解析参数、整车参数、路面抗滑值构建耦合关联的车辆-轮胎-路面模型,在此基础上研究不同湿滑路面状态下弯道行驶车辆的运动学参数值变化情况,探索路面抗滑性能与表征行车安全风险的运动学参数值之间的关系.研究结果表明,路面抗滑性能影响车辆运动学参数值变化是诱发交通事故的主要因素.较低的弯道路面抗滑性能易使车辆在制动时出现急速横摆、甚至侧翻的交通事故;车辆两侧轮胎接地面抗滑值不均衡对弯道行车安全的影响高于对直道行车安全的影响,车辆极易在弯道制动时出现因抗滑值不均衡而无法保持有效转弯半径、进而冲出车道的交通事故.研究可为制定弯道行车安全的保障措施提供理论依据. 

A Simulation Analysis of Pavement Skid Resistance Against Driving Safety on Curve Roads

In order to study impacts of pavement skid resistance against driving safety on curve roads,especially in a situation of braking,a vehicle-tire-road model by integrating parameters of analytical UA tire,vehicle body,and road pavement skid resistance is developed based on the ADAMS simulation platform.Kinematic parameters of vehicle in the model are derived on curve roads under different conditions of slippery pavement.Relationships between pavement skid resistance and kinematic parameters which indicating driving safety are studied.Simulation results show that varied pavement skid resistance can lead changes of kinematic parameters,which is the key factor causing potential traffic accidents.Lower skid resistance leads to rollover of vehicles,and slippery disparity in two sides of the road contacted with tires raises the risk of getting vehicles out of roads.This study can provide theoretical references for making measures to guarantee driving safety on curve roads.