铁道科学与工程学报Issue(2)：235-241,7.
桥下高速行驶列车对桥梁主梁位置风环境的影响研究
Wind environ ment research on the bridge section induced by high speed train under the bridge
摘要
Abstract
The pressure and velocity fields will change greatly when the high-speed train is running through the bridge,and the intense ambient aerodynamic effects will be produced in areas around,thereby affecting the anti-wind safety of around buildings and structures.Due to the fact that there exist insurmountable technical prob-lems in using wind tunnel test,in this proposed project,the Fluent in CFD software was firstly used as the simu-lation platform with 'dynamic mesh'technology.Secondly,the UDF trains route procedures were programmed to monitor the speed and the pressure distribution through monitoring the bridge sections.Thirdly,the process when the high-speed trains cross through the bridge in different speeds was simulated under the situations of no cross-wind wind,small crosswind and the bridge design crosswind.Finally,the impact loads generated under three kinds of wind to the main section of the bridge were calculated in different crosswind speed.This paper studied the aerodynamic effects in various conditions of wind on the train to the bridge main sections,which provides a valuable reference and recommendation for bridge designers in the bridge design institution.关键词
大跨桥梁/数值模拟/动网格/风环境Key words
long-span bridges/numerical simulation/dynamic mesh/wind environment分类
交通工程引用本文复制引用
董国朝,张建仁,蔡春声,韩艳..桥下高速行驶列车对桥梁主梁位置风环境的影响研究[J].铁道科学与工程学报,2015,(2):235-241,7.基金项目
国家自然科学基金青年基金资助项目（51408061）；交通运输部科技项目 （）
