横风作用下钢桁梁桥上列车气动导纳的风洞试验研究  

Wind tunnel tests for aerodynamic admittances of trains on a steel truss bridge under crosswind

作　　者：马存明[1,2] 段青松 廖海黎[1,2] 

机构地区：[1]西南交通大学桥梁工程系,成都610031 [2]西南交通大学风工程试验研究中心,成都610031

出　　处：《振动与冲击》2018年第2期150-155,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51778545);中国铁路总公司科技研究开发计划项目(2010G004-Ⅰ)

摘　　要：大跨度钢桁梁悬索桥对风作用敏感,桥上列车周围的流场也会受到较大影响,横风作用下考虑钢桁梁影响的列车气动力的研究十分必要。以某大跨度钢桁梁悬索桥为例,在风洞试验室建立两种大气紊流场,基于测压法分析静止于钢桁梁上列车气动力,得到频域内列车的等效气动导纳以及抖振力的跨向相关性,且考虑了攻角、紊流场、列车位置等影响因素,也指出了进一步的研究方向,为类似桥梁上列车运行的舒适性研究提供了一定的指导。The flow field around trains passing through bridges may be largely affected by long-span steel truss bridges which are sensitive to wind,it is necessary to analyze aerodynamic forces on trains under crosswind considering influences of steel truss bridges. Taking a long span steel truss suspension bridge as an example,two atmospheric turbulence fields were established in a wind tunnel lab. Then,the immobile aerodynamic forces on a train were analyzed with the pressure measurement method. The equivalent aerodynamic admittances and the cross correlation of buffeting foeces in frequency domain were obtained. The influences of wind attack angle,turbulent flow field and location of train were considered and the further study direction was pointed out. This study provided a reference for studying the comfort of train passing through similar bridges.

关 键 词：n钢桁桥 列车 气动导纳 横风 风洞试验 

分 类 号：U270.1[机械工程—车辆工程]