市域铁路隧道压力波数值方法初探

发布时间：2018-11-22 17:18

【摘要】：随着世界各国经济的发展,城市轨道交通越来越受到人们的重视,尤其是城市地铁的建设与发展。考虑到地铁造价,一般地铁隧道截面小、地铁列车未封闭,而随着地列车速度的不断提升,引起的空气动力学问题将不容忽视,比如隧道压力波、行车阻力和司乘人员的舒适性等。所以研究模拟地铁隧道压力波对以后发展和完善城市的轨道交通是很有必要的。地列车一般在地下运行,列车运行引起的空气流动同样受到空间限制,这与高速列车过隧道的情形是一样的。但从隧道结构和列车运行模式两个方面考虑,地铁列车过隧道又具有其复杂性:从隧道结构来讲,地铁隧道内设有车站,车站两侧和车站与车站之间设有通风竖井;从列车运行模式上来讲,地铁隧道内有多辆列车跟踪运行,且列车在隧道内要反复的进行匀、加、减速运动及停车。所以模拟地铁隧道压力波有一定的难度。考虑到地铁隧道结构和列车运行模式的复杂性,采用三维数值来模拟地铁隧道压力波具有较大的难度,所以本文采用一维可压缩、非定常、不等熵流动模型及广义黎曼变量特征线法,在相关学者的研究基础上,研究了一维数值模拟地铁隧道压力波方法,首次编写了用来模拟地铁列车过隧道压力波程序。本文以两列车在带有四个竖井的隧道内恒速跟踪运行为例,结合列车运行轨迹和波的反射图和分析了列车的车身压力波的合理性,研究了发车时间间隔和列车速度对车外压力的影响。得出结论:压力波在竖井位置发射后会产生新的压力波;隧道内两列车运行时,前一列车产生的压力波动会影响后一辆车的车外压力;缩短发车时间间隔可以缓减车外压力的最值;适当的降低车速可以缓减车外压力的最值。
[Abstract]:With the development of the world economy, people pay more and more attention to urban rail transit, especially the construction and development of urban subway. Considering the cost of the subway, the section of the subway tunnel is small and the subway train is not closed. However, with the increasing of the speed of the ground train, the aerodynamic problems can not be ignored, such as the tunnel pressure wave. Driving resistance and ride personnel comfort and so on. So it is necessary to simulate the pressure wave of subway tunnel for the future development and improvement of urban rail transit. Ground trains generally operate underground, and the air flow caused by train operation is also restricted by space, which is the same as that of high-speed trains passing through tunnels. However, considering the tunnel structure and train operation mode, the subway train passing through the tunnel has its complexity: from the tunnel structure, there are stations in the subway tunnel, ventilation shaft on both sides of the station and between the station and the station; In terms of train operation mode, there are many trains running in the subway tunnel, and the train in the tunnel must be leveled, accelerated, decelerated and stopped again and again. So it is difficult to simulate the pressure wave of subway tunnel. Considering the complexity of subway tunnel structure and train operation mode, it is difficult to simulate the pressure wave of subway tunnel by three-dimensional numerical method. Based on the research of relevant scholars, the one-dimensional numerical simulation method for pressure wave of subway tunnel is studied, and the program for simulating the pressure wave of subway train passing through tunnel is compiled for the first time, based on the unequal entropy flow model and the generalized Riemann variable characteristic line method. In this paper, taking the constant speed tracking of two trains in a tunnel with four shafts as an example, the reasonableness of the pressure wave of the body of the train is analyzed by combining the train track and the reflection diagram of the wave. The influence of departure interval and train speed on the external pressure is studied. It is concluded that the pressure wave will produce new pressure wave after the shaft position is launched, and the pressure fluctuation produced by the former train will affect the external pressure of the second car when the two trains in the tunnel are running. Shortening the departure time interval can reduce the maximum value of the external pressure, and a proper reduction of the speed can reduce the maximum value of the external pressure.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U451.3

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