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侧风下高速列车车体与轮对的运行姿态

, PP. 48-55

Keywords: 高速列车,空气动力学,系统动力学,侧风,车体,轮对,运行姿态

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Abstract:

应用流体动力学理论,建立了高速列车空气动力学模型,计算了作用于高速列车车体上的气动力和气动力矩;应用多体动力学理论,建立了车辆系统动力学模型,分析了在不同风向角、侧偏角与合成风速下高速列车头车车体和轮对的运行姿态。计算结果表明在不同侧风环境下,头车车体始终向背风侧横摆和侧滚;当风向角为90°时,车体的横向位移和侧滚角最大;当列车车速为350km.h-1,侧风风速分别为13.8、32.6m.s-1时,列车头车车体最大横向位移分别为74.2、171.7mm,最大侧滚角分别为3.1°和8.4°;当列车车速为200km.h-1,风速不小于32.6m.s-1,且风向角为90°时,列车头车一、二位轮对均向背风侧横移,背风侧车轮易发生爬轨现象,三、四位轮对均向迎风侧横移,三位轮对迎风侧车轮易发生爬轨现象;四位轮对的横移量和摇头角均小于前三位轮对,相对安全。

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