Pc-Crash中2种车辆侧滑事故仿真方法对比研究

Comparative study of two simulation methods for reconstructing side-slip accident in Pc-Crash

为研究Pc-Crash软件中Sequence模块与驾驶模型2种车辆侧滑事故仿真再现方法间的互通性,根据2种车辆侧滑事故仿真再现方法流程,分别再现同一典型单车侧滑事故,对比特定时刻及仿真全过程的输出参数值。结果发现,在0.967 s时,用不同方法所得车速、车头朝向、速度方向及车辆位置接近;2.780 s(仿真结束)时,除车速误差达2 km/h外,其他参数值均较接近;全过程仿真中,轮胎侧向力、横摆角速度、行驶速度、车头朝向等参数随时间变化曲线表明2种方法有很好的一致性;但因2种方法均通过调整轮胎转角控制车辆运动,故轮胎转角随时间变化规律存在明显差异。结果表明,2种车辆侧滑事故仿真再现方法具有良好的互通性。

The paper was aimed at studying correlation between two different methods for reconstruction side-slip accident in Pc-Crash. Steps of the two methods, Sequence and ＂Drive model＂ were given firstly. Then a side- slip accident was reconstructed by the two methods respectively. After that, values of many outputs in some special time and the whole simulation time were compared. Results showed that, at 0.967 s, values of the vehicle velocity, the vehicle heading direction, the velocity direction and the vehicle location obtained by using the two methods are close to each other, that at 2.780 s, which is the end time of the simulation, values of all parameters obtained by using the two methods are close to each other also except the vehicle velocity, the error of the vehicle velocity is about 2 km/h, that in the whole process simulation, the curves of tire lateral forces, yaw angular velocity, vehicle velocity and vehicle heading direction show the two methods are consistent with each other, and that since the vehicle motion in the two methods is all controlled by the steering angle, the curves of the steering angle are different obviously from each other. Results show that there are many analogies between the two methods.