隧道内斜井取风对高速列车倾覆稳定性的影响  

Effect of Air Extraction From Inclined Shafts in Tunnels on Overturning Stability of High-Speed Trains

作　　者：田经纬 万晓燕[2] 史宪明[2] TIAN Jingwei;WAN Xiaoyan;SHI Xianming(China Academy of Railway Sciences,Beijing 100081,China;China Railway Southwest Research Institute Co.,Ltd.,Chengdu 611731,Sichuan,China)

机构地区：[1]中国铁道科学研究院,北京100081 [2]中铁西南科学研究院有限公司,四川成都611731

出　　处：《隧道建设（中英文）》2023年第S01期233-239,共7页Tunnel Construction

基　　金：中国国家铁路集团重点课题(N2020G040)。

摘　　要：为研究利用斜井从临近高速铁路隧道内取风对运营列车稳定性的影响,以时速350 km单线隧道为例,通过三维数值模拟分别计算斜井屏蔽门关闭、屏蔽门开启但不取风和取风3种工况下列车的气动力系数并分析其变化特征,参考有关标准对列车倾覆稳定性进行讨论。研究表明:1)屏蔽门开启且取风时对列车倾覆稳定性的影响最大,屏蔽门开启但不取风时次之,屏蔽门关闭时最小;2)斜井取风增大了车体左右两侧的压力差,增加了列车侧翻的风险,但减小了车体上下两侧的压力差,有助于降低列车上下震荡;3)依据规范计算得到的倾覆系数判断,斜井屏蔽门开启且取风时列车不会发生倾覆。To explore the stability of operating trains when using inclined shafts to extract air from the adjacent highspeed railway tunnel,a case study is conducted on a single-track tunnel with a speed of 350 km/h.Furthermore,the aerodynamic coefficients of trains under three operating conditions:inclined shaft screen door closed,screen door open without air extraction,and screen door open with air extraction,and their variation characteristics are numerically simulated and analyzed.Finally,the overturning stability of the trains is discussed according to relevant standards.The research results show the following:(1)The operating condition of screen door open with air extraction greatly affect the overturning stability of the trains,that of screen door open without air extraction slightly affect the overturning stability of the trains,and that of screen door closed does not affect the overturning stability of the trains.(2)Air extraction from inclined shaft increases the pressure difference between the left and right sides of the train,which raises the risk of train overturning,but reduces the pressure difference between the top and bottom surfaces,thus reduces the vertical vibration of the train.(3)According to the coefficient of overturning calculated by the specification,when the screen door of the inclined shaft is opened with air extraction,the train will not overturn.

关 键 词：高速铁路隧道 斜井取风 倾覆稳定性 数值模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]