【摘要】 为提高越野汽车的平顺性,研究了典型越野路面不平度与车轮跳离路面量间的关系。以采石场路面高程样本为研究对象,估算得到路面功率谱密度。把路面不平度作为输入,在设定悬架质量、车轮质量、阻尼和悬架弹簧刚度等条件下,建立了车轮突然失去支承时车轮向下加速度方程。利用仿真技术考察了不同尺寸凹坑作用下车轮的跳跃。结果表明,如果凹深较小时,有无减振器影响不大。当凹深达到一定值时,对没有阻尼作用的汽车,车轮不会从路面跳离。有阻尼作用时车轮开始跳离路面。该结果可以用来指导典型越野路面上行驶的汽车悬架设计。更多还原

【Abstract】 In order to improve the ride comfort of off-road vehicles, the relation between the quarry terrain unevenness and the wheel jumping estimation were researched. As an example, the height data of quarry terrain were sampled and its power spectrum density was evaluated. By setting the initial value of suspension mass, wheel mass, damp and the stiffness of spring, the acceleration equation of wheel downwards when the wheel lose supporting suddenly was deduced. The wheel jumping was evaluated for difference potholes with the excitation of the terrain unevenness. The results show that the dampener is not important when the potholes are small. The wheel cannot jump off from the terrain for the vehicle without damp when the pothole is big enough, while the wheel with damp may jump off from the terrain. And it can be the reference for the suspension design of the typical off-road vehicle.更多还原