高速公路弯道行车轨迹仿真与影响因素分析

针对山区高速公路弯道事故高发的特点,对山区高速公路的弯道行车轨迹进行了仿真研究。首先考虑山区高速公路汽车行驶状态的非线性特性,建立基于非线性的5自由度汽车动力学模型的驾驶员-汽车-道路闭环操纵系统模型,然后应用模型对山区高速公路弯道的行车轨迹进行了模拟仿真,通过对不同道路条件下行车轨迹的对比分析,得到其对高速公路曲线段行车轨迹的影响规律：随着圆曲线曲率的增加,缓和曲线长度的减少,曲线超高的增大,行车轨迹侧向偏移越大。仿真结果对高速公路曲线段道路交通安全管理提供了理论支持。

Simulation and Influencing Factors of Freeway Driving Track in Turn

Mountain freeway features high accidents in curve;thus the driving track in the curve of freeway was studied by simulation methods.Firstly,for the non-linear characteristics of vehicles driving on the curve of freeway,the loop simulation model of driver-vehicle-road system was established in which 5-degree-of-Freedom（5 DOF） nonlinear vehicle model was involved to simulate driving track in the curve of mountain freeway based on the established system.Furthermore,the characteristics of driving track in turn were proposed through simulation.The simulation results showed that with the increase of curvature of circular curve,the decrease of length of transition curve,as well as the increase of super-elevation,the lateral displacement at curve becomes greater,which may provide some theoretical support for freeway traffic safety.