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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第12卷    第1期    总第63期    2015年2月

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文章编号:1672-7029(2015)01-0020-08
高速铁路复线隧道内压力波特性的数值模拟研究
刘希贤,郭安宁,梅元贵,许建林,李士安,周朝晖

(兰州交通大学 机电工程学院,甘肃 兰州 730070)

摘 要: 采用有限体积方法和任意滑移界面动网格技术的CFD方法,对我国高速列车和复线隧道条件下的压力波基本特性进行数值模拟研究。为避免数值计算产生不合理的物理现象,应用光滑启动技术。在验证本文数值方法正确性的基础上,采用三维非定常可压缩湍流流动模型方法,研究高速列车驶入单洞复线隧道时的压力波基本特征,揭示隧道内压力波的形成过程,得到不同断面上不同测点的压力变化及分布规律;研究结果表明:在初始压缩波三维效应的影响下,近隧道入口断面不同测点压力差异较大,且随着列车速度的增加,正压最大值也越大;在距离出口较近的断面上,当列车速度增加到一定范围,正压最大值反而减小;隧道衬砌上的正压最大值多出现在距离隧道入口较近处,而负压最大值则出现在隧道的中央断面上。

 

关键字: 高速列车;复线隧道;压力波;数值模拟

Numerical simulation of pressure wave characteristics generated by a high-speed train passing through a double-track tunnel
LIU Xixian, GUO Anning, MEI Yuangui, XU Jianlin, LI Shian, ZHOU Chaohui

College of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Abstract:The CFD method with finite volume method and arbitrary sliding interface moving mesh technology employed was utilized to conduct numerical investigation of the tunnel pressure waves induced by a high-speed train passing through a tunnel. In order to avoid unreasonable numerical physical phenomena, smooth start technology was used. After the validation, three-dimensional unsteady compressible turbulent flow model was adopted to study the formation of the pressure wave in tunnels. The formation process of the pressure wave was revealed, and its characteristics in different cross sections and measuring points were obtained. It shows that the pressure excursion is different in different cross sections near the portals of the tunnel yield by the three-dimensional effect of the initial compression wave. And the maximum positive pressure value also increases with the increase of train velocity. But the maximum positive pressure value decreases near the exit portal of the tunnels when the train velocity increases to a certain range. The maximum positive pressure value always appears near the entry portal of the tunnel, while the maximum negative pressure value occurs near the central section along with the tunnel.

 

Key words: high-speed railway; double-track tunnel; pressure wave; numerical simulation

ISSN 1672-7029
CN 43-1423/U

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