高速地铁气动荷载对屏蔽门的影响分析<sup>*</sup>

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摘要 研究目的： 随着城市的快速扩张,以及都市群的形成,为提高旅行速度,许多城市已建设或即将开始建设速度大于100 km/h的高速地铁项目。高速运行的地铁列车其气动效应会对轨侧设备设施产生脉动风压,作用在屏蔽门上的脉动风压会影响屏蔽门的启闭和可靠性。本文采用三维数值计算方法分析了高速地铁过站越行时,列车速度、活塞风井开闭、有无列车阻塞对轨行区压力波和屏蔽门气动荷载的影响。
研究结论： （1）活塞风井开关对压力波变化存在影响,活塞风井开启时压力波1 s和3 s内的变化极值都大于活塞风井关闭时;（2）列车运行速度、活塞风井开关、车站内是否存在列车阻塞,三个影响因素相比,列车运行速度对隧道内压力值及屏蔽门气动荷载的影响最大;（3）列车速度为100 km/h时,屏蔽门承受最大风压为 1.042 kPa;列车速度为140 km/h时,屏蔽门承受最大风压为1.486 kPa;（4）本文提出的高速地铁过站越行时压力波特性及对屏蔽门气动荷载的影响规律,可为后期类似工程采取有效防治措施提供参考依据。

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	赵刚

关键词 ：高速地铁, 压力波, 屏蔽门, 气动荷载

Abstract：Research purposes: With the rapid expansion of cities and the formation of urban agglomerations, many cities have constructed or are about to begin constructing high-speed subway projects with design speeds over 100 km/h. The aerodynamic effect of high-speed subway trains can generate pulsating wind pressure on the trackside equipment and facilities, and the pulsating wind pressure acting on the platform screen door can affect the opening and closing and reliability of the platform screen door. This paper used a three-dimensional numerical calculation method to analyze the effects of train speed, piston air shaft opening and closing, and the presence or absence of train blockage on pressure waves in the track area and aerodynamic loads on screen doors during high-speed subway overtaking.
Research conclusions: (1) The switch of the piston air well has an impact on the pressure wave changes, and the extreme values of the pressure wave changes within 1 s and 3 s with the piston air well opened are greater than that with the piston air well closed. (2) Compared with the three influencing factors of train running speed, piston air shaft switch, and whether there is train blockage in the station, the train running speed has the greatest impact on the pressure value inside the tunnel and the aerodynamic load of the screen door. (3) When the train speed is 100 km/h, the maximum wind pressure that the screen door can withstand is 1.042 kPa. When the train speed is 140 km/h, the maximum wind pressure that the screen door can withstand is 1.486 kPa. (4) The pressure wave characteristics and their impact on the aerodynamic load of screen doors during high-speed subway overtaking proposed in the paper provide a reference basis for effective prevention and control measures in similar projects in the future.

Key words： high speed subway pressure wave screen doors aerodynamic load

收稿日期: 2024-04-17

PACS:	TU393.3
	TU391

基金资助:中铁一院科学研究计划项目（院科18-73）

作者简介: ^**赵刚,1972年出生,男,高级工程师。

引用本文:

赵刚. 高速地铁气动荷载对屏蔽门的影响分析^*[J]. 铁道工程学报, 2024, 41(6): 76-84.
ZHAO Gang. Analysis of the Impact of High-speed Subway Pneumatic Load on Platform Screen Doors. Journal of Railway Engineering Society, 2024, 41(6): 76-84.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2024/V41/I6/76

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