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采用三维数值模拟方法和动网格技术对地铁列车以高速通过不同断面地铁隧道时的空气动力学效应进行了分析,得到了车体表面的压力变化情况,由车外压力换算得到了车内压力。参考美国地铁压力舒适度标准选取了最优断面;针对单体隧道和普通区间隧道2种情况,给出了时速100~140km/h时不同动态密封指数下,B型和A型地铁列车的隧道空气动力学效应断面优化取值,可供城市高速地铁隧道设计参考。
The aerodynamic effects of subway trains traveling through different sections of subway tunnel at high speed are analyzed by three-dimensional numerical simulation method and moving grid technology. The pressure changes on the surface of the vehicle body are obtained, and the pressure inside the vehicle is obtained from the pressure outside the vehicle . According to the standard of American subway pressure comfort, the optimal cross section is selected. According to the two cases of single tunnel and normal tunnel, the tunnels of type B and type A subway trains with different dynamic sealing index at 100 ~ 140km / h are given. Optimization of aerodynamic effect section, for urban high-speed subway tunnel design reference.