竖井面积对高速列车越站瞬变压力影响的试验研究

Experimental study on influence of shaft area on transient pressure of high-speed train through station

针对高速列车全速通过地下车站时所引起的瞬变压力问题,采用列车气动性能动模型试验装置,对8编组高速列车以速度300 km/h通过地下车站时的气动效应进行模拟,分析车站内设有竖井时列车表面、站台屏蔽门表面压力分布特性以及竖井面积对瞬变压力的影响。研究结果表明:当高速列车通过设置有竖井的地下车站时,列车表面、屏蔽门表面左右对称测点压力变化趋势基本一致,压力幅值相差不大;屏蔽门表面压力幅值沿纵向逐渐增大,沿高度方向则变化不大;随着竖井面积增大,列车、屏蔽门表面测点压力幅值均不断下降,相较于无竖井工况,列车表面测点压力幅值最大可降低48.87%,屏蔽门表面测点压力幅值最大可降低71.07%,其中,当竖井面积与隧道面积之比超过0.26时,进一步增大竖井面积,竖井对列车表面、屏蔽门表面的压力幅值的影响不明显。

Aiming at the problem of transient pressure caused by high-speed trains passing through the underground station at full speed,the dynamic model test device of train aerodynamic performance was used to simulate the aerodynamic effect of high-speed trains with eight carriages passing through the underground station at 300 km/h speed.The pressure distribution characteristics of train surface and platform screen door surface and the influence of shaft area on transient pressure were analyzed.The results show that when a high-speed train passes an underground station with a shaft,the pressure variation trend of the symmetrical measuring points on the train surface and the platform screen door surface is basically the same,and there is little difference in the pressure amplitude.The surface pressure amplitude of the platform screen door increases gradually along the longitudinal direction but has little change along the height direction.With the increase of the shaft area,the pressure amplitudes of the measuring points on the surface of the train and the platform screen door decrease continuously.Compared with the working condition,presure amplitudes of the train surface and the platform screen door surface is relatively insignificant when the shaft area is further increased.Without the shaft,the maximum pressure amplitudes of the measuring points on the train surface and the maximum pressure amplitudes of the measuring points on the platform screen door surface can be reduced by 48.87%and 71.07%,respectively.When the ratio of the shaft area to the tunnel area exceeds 0.26,the influence of the shaft on the pressure is not obvious.