桥梁若干流致振动与卡门涡街  

Various flow-induced vibrations of bridges and von Kármán vortex street

作　　者：张伟伟[1] 豆子皓 李新涛[1] 高传强 ZHANG Weiwei;DOU Zihao;LI Xitao;GAO Chuanqiang(School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《空气动力学学报》2020年第3期405-412,共8页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(91852115,11622220,11572252);国家数值风洞工程项目(NNW2018-ZT1B01)。

摘　　要：首先介绍了与桥梁流致振动相关的卡门涡街、涡致振动和颤振的概念。在此基础上,讲述历史上塔科马大桥风毁事件的研究争论,并再次澄清塔科马大桥风毁的直接原因是颤振而不是涡激共振。对虎门大桥振动问题,针对风工程领域中涡致振动问题的性质进行了讨论,指出限幅涡振问题,并伴随的锁频现象,本质上仍是结构自激振动问题,卡门涡街起到的是诱发而不是直接的推动作用。最后,对形形色色流致振动问题的差异和共性进行了讨论。Firstly,the concepts of von Kármán vortex street,vortex-induced vibration(VIV)and flutter associated with flow-induced vibrations of bridges were introduced.On this basis,the historical research controversies of the Tacoma Narrows Bridge was described.And it was clarified that the aerodynamic failure mechanism responsible for the collapse of the Tacoma was flutter rather than VIV.The vibration of Humen Bridge and the aerodynamic mechanism of the VIV in the field of wind engineering were discussed.The mechanisms of the amplitude-limited VIV and lock-in were essentially structural self-excited vibration,and von Kármán vortex street worked as an inducement rather than a direct push.Finally,the differences and commonalities of various flow-induced vibration problems were discussed.

关 键 词：卡门涡街 涡致振动 颤振 塔科马大桥 锁频 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] V211.1[交通运输工程—道路与铁道工程]