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为了研究大型客车行驶通过弯道时不同的超速程度对客车行驶安全性的影响,利用Trucksim软件,采用仿真建模的方法,选用侧向偏移量和轮胎载荷转移率作为分析指标,通过多组不同超速程度下客车分别行驶通过平直路段、一般弯道和急弯道时的车辆动力学仿真试验,定量对比分析了不同超速程度对弯道行驶客车横向稳定性的影响。仿真结果表明:客车无论是行驶通过一般弯道还是急弯道,超速程度与客车的横向稳定性呈负相关关系;超速程度越高,客车的横向稳定性越差,越易引发交通事故;在相同的超速程度下,客车在一般弯道更容易因偏离弯道路径而驶出路面、驶入相邻或对向车道,从而引发坠车、碰撞等交通事故,而客车在急弯道更容易引发侧翻事故。
In order to study the influence of different speeding on the driving safety of passenger cars when a large passenger vehicle passes a curve, a Trucksim software is used to simulate the modeling method. The lateral offset and tire load transfer rate are selected as the analysis indexes. Under different speeding conditions, the passenger cars respectively pass through the vehicle dynamics simulations of straight sections, normal curves and sharp curves, and quantitatively analyzed the influence of different speeding degrees on the lateral stability of the passenger cars with curved corners. The simulation results show that the bus speed is negatively correlated with the lateral stability of the bus whether the bus passes through a general curve or a sharp curve. The higher the speeding is, the worse the lateral stability of the bus is and the more it is likely to cause a traffic accident. Of the speeding, the passenger car in the general corner of the curve more easily off the curved road and out of the road, into the adjacent or opposite lane, causing the crash, collision and other traffic accidents, while the passenger car in sharp corners more likely to trigger the side Turn accident.