带肋斜拉索涡激振动和气动力特性的试验研究  

EXPERIMENTAL STUDY ON VORTEX-INDUCED VIBRATION AND AERODYNAMIC CHARACTERISTICS OF RIBBED STAY CABLES

作　　者：韩鹏 常幸 邵林媛 孙一飞 褚泽楷[1] 刘庆宽 HAN Peng;CHANG Xing;SHAO Lin-yuan;SUN Yi-fei;CHU Ze-kai;LIU Qing-kuan(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄050043 [3]河北省风工程和风能利用工程技术创新中心,石家庄050043

出　　处：《工程力学》2024年第S01期136-141,共6页Engineering Mechanics

基　　金：河北省自然科学基金创新研究群体项目(E2022210078);中央引导地方科技发展资金项目(236Z5410G);河北省高端人才项目(冀办[2019]63号);河北省高等学校科学技术研究项目(QN2024038);石家庄铁道大学硕士研究生创新项目(YC2023054);石家庄铁道大学硕士研究生创新项目(YC202425)。

摘　　要：为研究肋条安装方式(通长安装与间断交错安装)对斜拉索涡激振动和气动力特性的影响规律,进行了斜拉索节段模型的风洞试验。结果表明:只要安装肋条,就能够在一定程度上抑制斜拉索的涡激振动,在试验参数范围内,斜拉索涡激振动幅值最少可以降低46.16%;当肋条为通长安装时,会明显降低斜拉索涡激振动,但是会造成起振风速的增大或振动区间的延长;当肋条为间断交错安装时,整体抑振效果均好于通长安装情况,风攻角为15°时,肋条斜拉索的抑振效果达到了96.30%,可以用于特定来流风的环境当中;当肋条为间断交错安装时,斜拉索模型的平均阻力系数稳定在1.0~1.3,平均升力系数稳定在-0.07~0.14,具有一定的减阻效果;当风攻角α=15°和30°时,整体脉动气动力系数无明显雷诺数效应,脉动阻力系数稳定在0.025附近,脉动升力系数稳定在0附近,说明安装间断交错肋条后斜拉索具有更好的气动力效应。In order to study the effect of rib installation methods on vortex-induced vibration(VIV)and aerodynamic characteristics of stay cables,the wind tunnel test was carried out on the segment model of a stay cable.The results show that the arrangement of ribs has a good control effect on the VIV of the stay cable,and the VIV amplitude of the stay cable can be reduced by at least 46.16%within the test parameters;when the ribs are arranged in through-length,the VIV of the stay cable will be significantly reduced,but it will cause the right shift of the vibration wind speed or the extension of the VIV,and when the ribs are arranged in staggered intervals,the overall vibration reduction effect is better than that of the through-length arrangement.And at 15°,the vibration suppression effect reaches 96.30%,which can be used in the environment with specific incoming wind.When the ribs are staggered and interrupted,the mean drag coefficient of the stay cable model is stable at 1.0~1.3 and the mean lift coefficient is stable at-0.07~0.14,which proves the effectiveness of the arrangement of staggered and interrupted ribs in controlling the vortex-induced vibration response of the stay cable.There is no significant Reynolds number effect on the overall pulsating aerodynamic coefficient when the wind attack angleαequals15°and 30°.The fluctuating resistance coefficient is stable around 0.25,and the fluctuating lift coefficient is stable around 0.It shows that the stay cable has better aerodynamic effect after the installation of interlacing ribs.

关 键 词：斜拉索 肋条 风洞试验 涡激振动 气动力特性 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]