高速铁路半封闭防风走廊结构动模型试验研究

高速列车在新疆烟墩风区、百里风区、三十里风区及达坂城风区四大风区运行时,大风对列车运行安全及高速运行影响大,故需有效的路基防风工程为列车的运营提供安全保障。通过半封闭防风走廊结构动模型试验,测试动车组单车及交会工况下半封闭防风走廊结构与动车组模型表面空气压力波传播规律、出口压力波变化,并分析列车高速运行时半封闭防风走廊结构的气动力特性。试验结果表明:同一高度的内外侧测点压力变化值近似与动车组运行速度的平方成正比;当动车组在半封闭防风走廊路段中间时,半封闭防风走廊内外侧测点压力的绝对值最大。

Study on Dynamic Model Test of Semi-closed Windbreak Corridor for High Speed Railway

When high speed trains are operated in the four wind zones such as Yandun wind zone,100-mile wind zone,30-mile wind zone and Dabancheng wind zone in Xinjiang,strong wind has a great impact on train operation safety and high speed operation.Thus,an effective subgrade windbreak project is required for the safe operation of the train.In the two cases of single train operation and EMU meeting,the surface air pressure wave propagation of the semi-closed windbreak corridor and EMU model and the micro-pressure wave change at the exit were analyzed through the dynamic model test of a semi-closed windbreak corridor.Also,the aerodynamic characteristics of the semi-closed windbreak corridor was analyzed when the train run at high speed.The test results show that the pressure variations at the inner/outer measuring points of the same height are approximately proportional to the square of the running speed of the EMU.When the EMU is at the mid part of the semi-closed windbreak corridor,the absolute values of the pressure wave at the inner/outer measuring points arrive at the maximum.