Experimental investigation on the wind pressure on the platform screen door of a subway station
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摘要: 针对A+型标准地铁列车模型（缩尺比1：20），通过动模型弹射试验研究了地铁列车过隧道、过站台、跟随工况下的隧道内风压、屏蔽门风压分布与变化规律。研究发现：过隧道工况下，列车经过区间泄压井时，会产生与列车进入隧道时类似的压力波，但风压极值略小。过站台工况下，受前方传来的压力波影响，屏蔽门风压出现一极大值；列车通过站台时，屏蔽门风压出现另一极大值，并在车头经过后立刻达到极小值。这些极值风压决定了屏蔽门的强度设计标准。跟随工况下，当前后方列车尚有一定距离时，屏蔽门受压力波影响而出现风压极值，随后压力略为减小并持续一段时间，这一侧向压力是导致屏蔽门无法正常开闭的主要原因。Abstract: Using moving model tests, the pressure distribution and variation inside a tunnel and on a Platform Screen Door (PSD) have been investigated for the cases of a train passing the tunnel, passing the station and tracing. The scale ratio of the standard A+ subway train model is 1:20. It is found that a pressure wave is generated when the train is passing the shaft of the tunnel, which is similar to the situation when a train is entering a tunnel except for the smaller extreme pressure value. For the case of a train passing a station, the pressure on the PSD is dominated by the pressure wave transfering through the tunnel; when the train reaches the station, this pressure experiences another extreme value, and then shifts to a negative extreme value immediately when the train's head passes the PSD. These extreme pressures determine the strength design criteria for the PSD. For the train tracing case, the pressure on the PSD reaches its extreme value caused by the pressure wave when the coming train is still at a distance from the station. Then, this pressure decreases slightly and keeps approximately constant for a period. This lateral pressure is the reason why the PSD cannot open or close properly.
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Key words:
- subway /
- moving model test /
- pressure wave /
- platform screen door (PSD) /
- train tracing case
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