高速列车经过时作用在跨线天桥风压力数值模拟  

Numerical simulation of wind pressure on cross-line bridges due to pass of high-speed trains

作　　者：郑修凯 杨娜[1] 张建[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《铁道科学与工程学报》2014年第2期14-20,共7页Journal of Railway Science and Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(2012JBM007);国家自然科学基金资助项目(50938008);国家自然科学基金青年基金资助项目(51208035);新世纪优秀人才支持计划资助项目(NCET-11-0571)

摘　　要：高速列车经过火车站时,列车与建筑物之间会出现十分复杂的非定常湍流现象。该复杂流场对建筑物产生很大甚至是破坏性影响。采用数值方法模拟这种复杂流场,运用滑移网格技术,结合k-ε二方程湍流模型对跨线天桥周围的三维、非定常和可压缩流动进行数值模拟研究。研究结果表明:对于跨线天桥、站台雨棚以及火车站大跨屋盖等跨线结构,在结构设计时需要考虑列车风致效应。When a high - speed train is passing through a station, complex unsteady turbulent flows arise between the train and building structure. Particularly in the case that the high - speed train is close to the building, these flows would have significant even devastating influence. In order to simulate the complicated flow field, numerical approach was employed in this paper, and three -dimensional unsteady compressible flows around a cross - line bridge for passengers were evaluated with sliding mesh technology combined with the two - equation k - turbulence model. The numerical results demonstrate that these wind -induced effects should be taken into consideration during the structure design period, particularly for cross - line bridges, platform canopies, long - span roofs of railway stations, etc.

关 键 词：高速列车 数值模拟 跨线天桥 列车风 

分 类 号：U291.65[交通运输工程—交通运输规划与管理]