隔离墙长度对高速列车过站气动效应的影响

Influence of the Partition Wall Length on Aerodynamic Effect of High Speed Train Passing Station

研究目的:成自高铁天府机场站是全世界首座列车以350 km/h不减速过站的地下车站,高速列车过站引起强烈的气动效应对车站运营的安全性和舒适性产生不利影响。设置隔离墙将影响地下车站内的气动效应,国内外已有研究主要集中在隔离墙的存在对气动效应的影响,缺少隔离墙结构尺寸对气动效应影响的研究。本文采用数值模拟方法,分析隔离墙长度对车内瞬变压力、站台屏蔽门气动荷载、隔离墙与进出站隧道内压力波动的影响,以期为相关工程提供参考。研究结论:(1)隔离墙长度对列车内外表面压力变化幅值的影响较小,列车静态密封指数为36 s时车内瞬变压力满足人耳舒适性标准;(2)对站台屏蔽门表面压力变化幅值的影响较大,存在一个最不利隔墙长度;(3)隔离墙表面压力变化幅值随隔离墙长度的增加而减小;(4)对进站隧道内压力变化影响较小,对出站隧道内压力变化影响较大,存在一个最不利隔墙长度;(5)本研究成果可为高速铁路地下车站气动效应控制的设计工作提供指导。

Research purposes:The Tianfu AiqDort Station of Chengdu-Zigong High-speed Railway is the first underground station in the world where the train passes at a speed of 350 km/h without slowing down.The strong aerodynamic effect caused by the high-speed train adversely affects the safety and comfort of the station operation.The installation of partition walls will affect the aerodynamic effects in underground stations.Existing studies at home and abroad mainly focused on the influence of partition walls on aerodynamic effects,and there is a lack of research on the influence of partition wall structure size on aerodynamic effects.Using numerical simulation methods,the influence of the length of the partition walls on the transient pressure in the train,the aerodynamic load of the platform screen door,the pressure fluctuations in the partition wall and the entry and exit tunnel were analyzed,in order to provide a reference for related projects.Research conclusions:(1)The length of the partition wall has little effect on the variation amplitude of the pressure inside and outside the train.When the static sealing index of the train is 36 s,the transient pressure inside the train meets the standard of human ear comfort.(2)It has a great influence on the amplitude of the pressure change of the platform screen door,and there is a most unfavorable partition wall length.(3)The amplitude of pressure change on the surface of the partition wall decreases as the length of the separation wall increases.(4)It has a little influence on the pressure change in the inbound tunnel,and a greater impact on the pressure change in the outbound tunnel,there is a most unfavorable partition wall length.(5)The research results can provide guidance for the design of aerodynamic effect control of high-speed railway underground stations.