车桥组合状态下CRH2客车横风气动特性研究  

Aerodynamic characteristics of CRH2 train in combination of vehicle-bridge with cross wind action

作　　者：李永乐[1] 向活跃[1] 侯光阳[1] 陈克坚[2] 

机构地区：[1]西南交通大学桥梁工程系,四川成都610031 [2]中铁二院工程集团有限公司,四川成都610031

出　　处：《空气动力学学报》2013年第5期579-582,共4页Acta Aerodynamica Sinica

基　　金：国家自然科学基金项目(50508036);铁道部科技研究开发计划重大课题子项(2009E004-D-6)

摘　　要：风-车-桥耦合振动中通常需要考虑相互气动影响的车辆和桥梁各自的气动力系数,CRH2车型新颖,对风的作用敏感,但其横风气动特性缺乏研究。为考虑车辆和桥梁的相互影响,选取典型的大跨度铁路桥梁断面和典型的中小跨度桥梁断面,利用交叉滑槽系统,测试了车桥组合状态下车辆沿不同类型的桥梁运行时的气动特性。分析了单独车辆情况下的CRH2的气动三分力系数,讨论了雷诺数、车桥组合状态、桥梁类型对车辆气动力系数的影响。试验表明,不同类型桥梁情况下CRH2列车气动特性差异显著,双车交会时,背风侧车风荷载会发生突变。测试所得CRH2客车的气动参数可用于风-车-桥耦合振动分析。It is necessary to measure static aerodynamic force coefficients of vehicles and bridge deck in wind-vehicle-bridge coupling vibration analysis. The section of CRH2 train is novel and sensitive to the action of the wind, but the research on aerodynamic characteristics of CRH2 train with cross wind action is rarely introduced. The typical sections of large span railway bridge and small-medium span bridge section are se- lected to investigate the interaction between vehicles and bridges. The aerodynamic force coefficients of vehi- cles are tested using the crossed slot system in wind tunnel for the different combination of vehicle and bridge. Aerodynamic coefficients of CRH2 train without bridge deck are analyzed. Reynolds number, the combination condition of vehicle and bridge, the type of bridge deck section are investigated to demonstrate their effects on vehicle wind loads. The test results show that aerodynamic characteristics of CRH2 train with different type bridges are different significantly, the wind load on the vehicle at leeward side may change abruptly when two trains pass each other. The measured aerodynamic parameters of CRH2 train can be used for the coupling vibration analysis of wind-vehicle-bridge systems.

关 键 词：风-车-桥系统 气动特性 风洞试验 交叉滑槽系统 铁路桥梁 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]