西南交通大学学报2012，Vol.47Issue(2)：175-180,6.DOI:10.3969/j.issn.0258-2724.2012.02.001
高速铁路隧道缓冲结构的气动作用分析
Aerodynamic Analysis on Entrance Hood of High-Speed Railway Tunnels
摘要
Abstract
In order to reduce pressure pulse effects produced from train running into tunnels, an entrance hood is often built on high-speed railway tunnel entrance. Numerical calculations were conducted to study the effects of structural parameters of a tunnel entrance hood, such as the entrance shape, the lengths of whole entrance hood and the transition section in it, and side wall opening areas on air pressure peaks as a high-speed train enters the tunnel at 350 km/h. The calculation results show that the entrance shape, the length of transition section in entrance hood has a little effect on pressure peaks; the length of entrance hood has a optimal value as other structure fixed; increasing opening areas on the side wall reduces the rate of pressure change, but increases pressure peaks. If two trains meet in the middle of a tunnel, the presence of an entrance hood reduces the pressure peaks.关键词
高速铁路/隧道缓冲结构/空气动力学Key words
high-speed railway/ entrance hood of tunnel/ aerodynamics分类
交通工程引用本文复制引用
李人宪,关永久,赵晶,赵继维..高速铁路隧道缓冲结构的气动作用分析[J].西南交通大学学报,2012,47(2):175-180,6.基金项目
国家科技支撑计划资助项目(2009BAG12-A10) （2009BAG12-A10）
