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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 11    November 2018

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Influence of enlarged section parameters on pressure transients of high-speed train passing through a tunnel
WANG Tian-tian(王田天)1, LEE Chun-hian(李椿萱)1, YANG Ming-zhi(杨明智)2

1. National Laboratory for Computational Fluid Dynamics, School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;
2. Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China

Abstract:The influence of enlarged section parameters on pressure transients of high-speed train passing through a tunnel was investigated by numerical simulation. The calculation results obtained by the structured and unstructured grid and the experimental results of smooth wall tunnel were verified. Numerical simulation studies were conducted on three tunnel enlarged section parameters, the enlarged section distribution along circumferential direction, the enlarged section area and the enlarged section distribution along tunnel length direction. The calculation results show that the influence of the different enlarged section distributions along tunnel circumferential direction on pressure transients in the tunnel is basically consistent. There is an optimal enlarged section area for the minimum value of the pressure variation amplitude and the average pressure variation in the tunnel. The law of the pressure variation amplitude and the average pressure variation of the enlarged section distribution along tunnel length direction are obtained.

 

Key words: high-speed train; enlarged section parameters; tunnel; pressure transients

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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