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为了对大客车道路行驶过程中的侧翻行为进行动力学分析,基于Matlab/Simulink搭建了驾驶人-大客车-道路仿真模型,利用该模型对某二级公路长3.6km路段进行了驾驶人的行驶仿真,采用方向盘转角、侧向偏移距离、侧向加速度、横摆角速度、质心侧偏角、车辆侧倾角、侧向载荷转移率7种动力学指标来评价大客车行驶安全性。研究结果表明:利用侧向载荷转移率对大客车侧翻趋势进行评价更加合理;相比于单纯的平曲线半径较小路段,在多弯道路段,车辆由于需要连续适应道路线形的变化,更易引起车辆侧向运动的不断累积,从而更容易引发道路交通事故;若弯道路段的前、后均为较长直线路段,驾驶人有足够的空间对车辆进行调整,从而在一定程度上降低了事故发生的概率。
In order to analyze the rollover behavior in the bus driving process, a driver-bus-road simulation model was built based on Matlab / Simulink. Using this model, a driver’s Driving simulation, the driving safety of the bus is evaluated by using seven kinds of dynamic indexes of steering wheel angle, lateral offset distance, lateral acceleration, yaw rate, center of mass roll angle, vehicle roll angle and lateral load transfer rate. The results show that it is more reasonable to use the lateral load transfer rate to evaluate the rollover tendency of the bus. Compared with the simple section with a small radius of the flat curve, the vehicle is more likely to adapt to the change of the road shape continuously in the multi-curve section Resulting in the continuous accumulation of vehicle lateral movement, which is more likely to lead to road traffic accidents; if the corner section of the road before and after a longer straight section, the driver has enough space to adjust the vehicle, which to some extent reduced The probability of an accident.