车辆纵向动力学模型与计算机仿真的研究

STUDY ON THE MODEL OF LONGITUDINAL DYNAMICS OF RAILCAR AND ITS COMPUTER SIMULATION

作者分析了以往纵向动力学模型失真的原因,并结合敞车冲击试验资料,提出一个用数字仿真的车辆纵向动力学模型。通过计算,认为纵向动力学模型应考虑钩缓装置的质量、缓冲器回程的滞后现象和冲击摩擦系数随冲击速度的增大而降低的事实。文章以车列的互撞为例,得出的结论是仿真与试验结果相吻合。

After analyzing the cauas of destortion of longitudinal dynamics model and the impacttest data of the open-top wagons, this paper describes naw digital simulation model of lon-gitudinal dynamics of railcar. From the calculation, it is hold that the quality of couplersand draft gears, the hysteresis phenomenon of draft gear reset., and the impect friction coef-ficient decreases as the impact speed increases most be accounted. By taking examples oftrain set collision, the conclusion is that the computer simulation agrees with the testresult.