Fundamental study on safety of vehicle running on steep curve at low speed

轨道车辆在陡坡弯道上行驶时，外轮的轮缘容易在钢轨顶面上发生骑行。本文提出了一种轨道车辆以较低速度在短半径弯曲轨道上行驶的数值分析方法，并给出了数值算例。得出的相对纵向速度的小区别正确的铁路和左回转运动产生的铁路车辆在数值分析中起着重要的作用,并从铁路车轮的下降可能发生,如果车辆的静态轮载荷持有大不平衡数量和接触表面的摩擦车轮和轨道之间达到一定的高价值。

When a railway vehicle is running on a steep curve section, the wheel flanges of the outside wheel are prone to ride on the rail top surface. In this study, a simulation method for numerical analysis of a railway vehicle running on a curved track with short radius at a relatively low speed is developed and some numerical examples are shown. It is concluded that the small difference between the relative longitudinal velocity of the right rail and that of the left rail generated by the turning motion of the vehicle plays an important role in the numerical analysis, and that the dropping of the wheel from the rail top may occur, in the case that the static wheel load of vehicle holds a large unbalance number and the friction at the contact surface between the wheel and the rail reaches to a certain high value.