Numerical Simulation of Pressure Fluctuation in Tunnel Caused by High-Speed Maglev Trains Passing Each Other

被引：1
|
作者：
Jia Y. [1 ]
Yang Z. [1 ]
Yao S. [2 ]
Mei Y. [1 ]
机构：
[1] Gansu Province Engineering Laboratory of Rail Transit Mechanics Application, Lanzhou Jiaotong University, Lanzhou, 730070, Gansu
[2] National Engineering Research Center for High-Speed EMU, CRRC Qingdao Sifang Co., Ltd., Qingdao, 266111, Shandong
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2020年 / 41卷 / 03期
关键词：
Clearance area of tunnel; High-speed maglev train; Pressure wave in tunnel; Train length; Train velocity; Trains passing each other; Tunnel length;
D O I：
10.3969/j.issn.1001-4632.2020.03.10
中图分类号：
学科分类号：
摘要：
Using one-dimensional (1D) compressible unsteady non-homentropic flow model and the method of the characteristic line of generalized Riemann variable, the distribution of the pressure peak in the tunnel caused by maglev trains passing each other with the speed of 600 km • h-1 was studied. The effects of tunnel length, tunnel clearance area, train velocity and the length of maglev train were analyzed. Results show that the pressure fluctuation of the central measuring point of the tunnel is the most intense, and the pressure peak is symmetrically distributed from the central position to the two sides of the tunnel. When the train velocity is 400~650 km • h-1 and the train formation is 3~10 cars, the most unfavorable tunnel lengths based on the pressure peak in the tunnel range from 160 m to 1 000 m. The pressure peak decreases with the increase of tunnel clearance area, and increases dramatically with the increase of train velocity. In addition, train length has almost no effect on it. It is found that the pressure peak in the tunnel is approximately proportional to the -1.1~-1.4 power of tunnel clearance area and 2.0~3.8 power of train velocity. If the existing clearance area standard of double-track tunnel for 350 km • h-1 high-speed railway is adopted, the pressure peak in the tunnel is up to ±30 kPa when two trains passing each other at the speed of 600 km • h-1. It is recommended to increase the tunnel clearance area or add pressure relief facilities such as shaft to meet the ERRI medical health standards. © 2020, Editorial Department of China Railway Science. All right reserved.
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页码：86 / 94
页数：8
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