强横风下青藏线棚车气动性能研究

Aerodynamic forces acting on a box car running on Qinghai-Tibet railway under strong cross-wind

采用非结构网格,对强横风下青藏线桥梁上运行的棚车气动性能进行数值模拟,并对部分数值模拟的结果进行风洞实验验证。计算结果表明:实验结果和数值模拟的结果较吻合;在指数风条件下,棚车的气动力随桥梁高度和横风速度的增加而迅速增加;而列车的减速运行,将使棚车所受到的气动力和倾覆力矩降低,有助于棚车安全通过风区桥梁。

The aerodynamic performance of the box car running on an bridge of Qinghai - Tibet railway line under strong cross- wind was simulated using unstructured mesh technique. The simulation results show that the results of wind tunnel test agree with those calculated. The aerodynamic forces can rapidly increase with the increase of the bridge＇ s height and wind - speed. When the train runs slowly, the aerodynamic forces acting on the box car decreases, which is helpful to the train passing safely the bridge of wind zone.