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车辆在一定的轮胎—路面状态下制动时的稳定性主要决定于各轴间制动力的分配。对于汽车列车,它还决定于牵引车和挂车之间制动力作用时间的协调。过去,不少研究人员已经注意到了由于种种原因所引起的同一轴上左右两边车轮制动力矩的不平衡及其对制动稳定性的影响。参考文献[1]认为制动时左右车轮不同的热效应会引起它们的制动器热衰退的变化,从而使得左右车轮制动力矩不相等。但大多数研究者则把左右车轮制动力矩看成是始终相等的。事实上,制动力矩是受很多因素影响的,而且几乎所有这些因素都是随机变化的。本文主要研究如何由数字电子计算机建立一定概率分布的随机数据来模拟左右车轮的随机制动力矩,并分析它们对一个五轴半挂车汽车列车在制动加转向工况下横向稳定性的影响。
The stability of the vehicle under certain tire-road conditions mainly depends on the distribution of braking forces between the shafts. For a car train, it also determines the timing of the braking force between the tractor and the trailer. In the past, many researchers have noticed the imbalance of wheel braking torque on the left and right sides of the same axle caused by various reasons and their impact on the stability of braking. Reference [1] that the braking effect of different left and right wheels will cause their brake hot recession changes, making the left and right wheel braking torque is not equal. However, most researchers treat the left and right wheel braking moments as equal. In fact, braking torque is affected by many factors, and almost all of these factors are random changes. This paper mainly studies how to simulate the random braking torque of the left and right wheels with random data with certain probability distribution by digital electronic computer and analyze their influence on the lateral stability of a five-axle semitrailer train under braking plus steering conditions.