發(fā)布時間：2018-11-22 17:18

【摘要】：隨著世界各國經(jīng)濟的發(fā)展,城市軌道交通越來越受到人們的重視,尤其是城市地鐵的建設(shè)與發(fā)展�？紤]到地鐵造價,一般地鐵隧道截面小、地鐵列車未封閉,而隨著地列車速度的不斷提升,引起的空氣動力學問題將不容忽視,比如隧道壓力波、行車阻力和司乘人員的舒適性等。所以研究模擬地鐵隧道壓力波對以后發(fā)展和完善城市的軌道交通是很有必要的。地列車一般在地下運行,列車運行引起的空氣流動同樣受到空間限制,這與高速列車過隧道的情形是一樣的。但從隧道結(jié)構(gòu)和列車運行模式兩個方面考慮,地鐵列車過隧道又具有其復雜性:從隧道結(jié)構(gòu)來講,地鐵隧道內(nèi)設(shè)有車站,車站兩側(cè)和車站與車站之間設(shè)有通風豎井;從列車運行模式上來講,地鐵隧道內(nèi)有多輛列車跟蹤運行,且列車在隧道內(nèi)要反復的進行勻、加、減速運動及停車。所以模擬地鐵隧道壓力波有一定的難度�？紤]到地鐵隧道結(jié)構(gòu)和列車運行模式的復雜性,采用三維數(shù)值來模擬地鐵隧道壓力波具有較大的難度,所以本文采用一維可壓縮、非定常、不等熵流動模型及廣義黎曼變量特征線法,在相關(guān)學者的研究基礎(chǔ)上,研究了一維數(shù)值模擬地鐵隧道壓力波方法,首次編寫了用來模擬地鐵列車過隧道壓力波程序。本文以兩列車在帶有四個豎井的隧道內(nèi)恒速跟蹤運行為例,結(jié)合列車運行軌跡和波的反射圖和分析了列車的車身壓力波的合理性,研究了發(fā)車時間間隔和列車速度對車外壓力的影響。得出結(jié)論:壓力波在豎井位置發(fā)射后會產(chǎn)生新的壓力波;隧道內(nèi)兩列車運行時,前一列車產(chǎn)生的壓力波動會影響后一輛車的車外壓力;縮短發(fā)車時間間隔可以緩減車外壓力的最值;適當?shù)慕档蛙囁倏梢跃彍p車外壓力的最值。
[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.
【學位授予單位】：蘭州交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U451.3

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本文編號：2350029