爆胎汽车方向失稳及侧倾稳定性建模仿真

Simulation of Direction Instability and Roll Stability of Tire-burst Vehicle

为了更好的控制汽车爆胎后方向稳定性,降低高速下侧翻的危险性,通过分析爆胎后车轮的滚动半径变小导致汽车运动方向发生偏离;爆胎汽车重心发生转移导致每个车轮的垂向载荷发生变化而引起侧偏力的改变;及爆胎车轮与地面的附着系数增大而产生的附加横摆力矩,建立爆胎汽车方向失稳及侧倾稳定性模型。相关仿真结果表明:建立的非线性模型能较准确地描述爆胎汽车的方向失稳及侧倾稳定性特性。

In order to better control the direction instability after puncture,and reduce the risk of roll over accidents for vehicle with high speed,this paper analyzes the rolling radius of the burst-tire wheel causing directional instability,the vertical load of each vertical wheel causing the change of cornering force and the increasing of adhesion coefficient between wheels and surface producing additional yawing moment.With these main vehicle parameters,the model of the direction instability and the roll stability simulation was established.Relevant simulation results show that the nonlinear model can describe the direction instability and roll stability characteristics.