高速铁路复线隧道内压力波特性的数值模拟研究

发布时间：2017-12-27 22:35

本文关键词：高速铁路复线隧道内压力波特性的数值模拟研究　出处：《铁道科学与工程学报》2015年01期 　论文类型：期刊论文

【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。
[Abstract]:Based on the CFD method of finite volume method and arbitrary sliding interface dynamic mesh technique, the basic characteristics of pressure waves in high-speed train and double track tunnel in China are numerically simulated. In order to avoid the irrational physical phenomena in numerical calculation, the smooth start technology is applied. On the basis of the numerical method to verify correctness, using the three-dimensional unsteady turbulent flow model, the pressure wave characteristics of high-speed train entering a single hole tunnel, reveal the formation of the pressure wave in the tunnel, different section on different measuring pressure changes and distribution points; the results of the study show that in effect the three-dimensional effect of the initial compression wave, near the tunnel entrance section of different measuring points of pressure difference, and with the increase of train speed, the maximum positive pressure is greater; in the section near an exit distance, when the train speed is increased to a certain extent, maximum positive pressure decreases; the tunnel lining the positive pressure maximum value appeared in the distance near the entrance to the tunnel, and the maximum negative pressure appears in the central section of the tunnel.
【作者单位】：兰州交通大学机电工程学院;
【基金】：国家自然科学基金资助项目(51065013) 国家重点基础研究发展规划(“973计划”)项目(2011CB711101)
【分类号】：U451.3
【正文快照】： 隧道压力波是高速铁路隧道空气动力学中的一个重要现象,会产生乘客舒适性、列车车体及部件和隧道内固定设备等疲劳强度设计问题[1-4]。随着我国高速铁路的发展,国内开展了实车和动模型试验,揭示了压力波的形成和变化特性[5-10]。隧道压力波的数值模拟方法有一维流动模型和三维

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