横风对双层集装箱平车运行稳定性的影响

采用流场数值模拟计算方法，计算了横风作用时的垂向气动升力系数、气动横向力系数和侧滚力矩系数，得出各系数与车辆速度和风速之间的变化关系。从动力学角度，根据力矩平衡原理推导了横风作用时车辆稳定性计算关系式，根据车辆运行的实际情况得出双层集装箱平车在不同装载情况下的临界倾覆风速和风速之间的关系，并分析了垂向气动升力、横向气动力和侧滚力矩对车辆倾覆稳定性的影响。结果显示，横风引起的力中气动横向力占主导作用；空车比重车的临界倾覆风速低；重车比空车的临界运行车速低。

Cross-wind affection on double container train

Using numerical computation of fluid flow, the coefficients of vertical force, lateral force and rolling moment caused by cross-wind were calculated, which were related to train speed and wind speed. The equation of train stability was derived with the theory of moment balance from the view of dynamics, and the relation between the train's critical speed of different loading conditions and wind speeds was calculated based on the real running. The effects of vertical force, lateral force and rolling moment on the capsize stability were also analysed. The results show that the vertical force is main factor caused by cross-wind, the critical wind speed of empty car is lower than the speed of loading car, and the critical train speed of loading car is lower than that of empty car. 3 tabs, 6 figs, 7 refs.