摘要
本文通过对桥梁和路堤上棚车的缩比模型的风洞试验得到了车辆气动力系数与侧滑角之间的关系。在此基础上,根据力矩平衡原理,建立了在强横风情况下棚车在轨道上倾覆和车体在转向架上倾覆的计算关系式。分别得到了棚车在转向架上倾覆和在轨道上倾覆时棚车车速与临界倾覆之间的关系。计算结果表明:棚车车体在转向架上倾覆的临界风速小于同等车速下棚车在轨道上倾覆的临界风速。
The relation between sideslip angle and aerodynamic coefficients of scaled box car model is obtained through the wind tunnel test.Based on the relation between attack angle and aerodynamic coefficients and moment equilibrium theory,the calculation equations of box-car overturning on the track and that of car body overturning on the bogie are built under strong cross wind.The relation between train＇s speed and the critical overturning wind speed is calculated,the results show that the critical wind speed of car body overturning on the bogie is less than the speed of car overturning on the track under the same train＇s speed.
关键词
车辆工程
倾覆稳定性
风洞试验
棚车
横风
rolling stock works
overturning stability
wind tunnel test
box-car
cross wind
