斜切式洞门缓冲结构开口率的优化分析  

Bamboo-truncating portal hood optimization of aperture ratio analysis

作　　者：贺旭洲[1] 王英学[2] 付业凡[2] 彭永利[1] 

机构地区：[1]湖北省交通规划设计院,湖北武汉430051 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《空气动力学学报》2012年第2期202-205,共4页Acta Aerodynamica Sinica

基　　金：铁道部科技研究开发计划(2008G031-13-1)

摘　　要：采用数值分析方法中的动网格技术,对高速列车在突入顶部开口的斜切式洞门隧道的空气动力学问题进行了三维数值模拟。计算结果的分析表明:顶部开口的斜切式洞门缓冲结构降低首波压力峰值的效果不明显,降低压力梯度的效果明显,并且降低压力梯度的效果与速度有一定关系,在确定速度下,存在最优开口率。Using dynamic mesh technology of numeral simulation method, the pressure wave transportation process, ereated when high-speed train passing through tunnel with ceiling opengings hood on bambootruncating portal, was simulated in three dimensions. The calculation result shows that hood with ceiling openingson bamboo-truncating portal does little favor for reducing peakressure, but has good effect on reducing peak-pressure gradient. And result also shows that the effect of tunnel hood reducing peak-pressure gradient relevant to the speed of train. On the determining speed, there is optimum aperture ratio.

关 键 词：高速列车 隧道 缓冲结构 斜切式洞门 动网格 

分 类 号：U453.1[建筑科学—桥梁与隧道工程]