考虑风屏障效应的车桥系统三分力系数风洞试验研究  

Wind tunnel test of tri-component coefficients for a train-bridge system considering wind barrier effect

作　　者：王玉晶 郭薇薇[1,2] 夏禾 张楠[1,2] 张田 WANG Yujing;GUO Weiwei;XIA He;ZHANG Nan;ZHANG Tian(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing Key Laboratory of Structural Wind Engineering and Urban Wind Environment Beijing 100044,China;Transportation Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京市结构风工程和城市风环境重点实验室,北京100044 [3]大连海事大学交通运输工程学院,辽宁大连116026

出　　处：《振动与冲击》2018年第20期88-94,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51878036);国家自然科学基金(51720105005);国家自然科学基金重点项目(U1434205);国家自然科学基金(51608087)

摘　　要：采用节段模型风洞试验,测试了车辆通过平地路基、跨度32 m简支箱梁、跨度16 m简支T梁时的三分力系数,综合分析了不同行车工况、不同线路构造形式及设置单、双侧风屏障后车辆和桥梁的气动特性。结果表明:较于箱梁和T梁,车辆在路基上行驶时更安全;安装单侧风屏障和双侧风屏障时车辆和桥梁的气动力系数都很接近,背风侧风屏障并不能有效改善车辆的气动性能;双车存在时背风侧车对迎风侧车的气动干扰较小,而迎风侧车的存在却使背风侧车的气动力系数减小,侧力系数甚至出现负值;风屏障的存在改变了车桥系统周围的流场;迎风侧车对右轨线的侧倾力矩系数总是大于对左轨线的侧倾力矩系数。With wind tunnel test of a sectional model,the tri-component coefficients of a train when it runs on the flat ground,a 32m span simply-supported box girder and a 16m span simply-supported T-shaped beam were tested,respectively.Aerodynamic characteristics of the train and the bridge were comprehensively analyzed under different running cases,different railway forms,and different wind barrier conditions(installed on single side or both sides).The results show that it is safer for the train to run on the flat ground than on the box girder and the T-shaped beam.Aerodynamic coefficients of the train and bridge were very close when the wind barriers were installed on the windward side and both sides,demonstrating that the existence of leeward barrier cannot improve the aerodynamic performance efficiently.When there are simultaneously two trains,the leeward train has little aerodynamic interference on the windward one,while the windward train decreases the aerodynamic coefficients of the leeward train even to make the side force coefficient a negative value.The existence of wind barrier obviously changes the wind flow around the train-bridge system.Rolling moment coefficient to the right track is always greater than that to the left track.

关 键 词：车桥系统 风屏障 气动特性 行车安全性 风洞试验 

分 类 号：U24[交通运输工程—道路与铁道工程]