梯形螺旋线对斜拉索上水线的影响及其减振效果研究  

Influences of trapezoidal helix on waterline of stay cable and its vibration reduction effect

作　　者：王剑[1] 戚永圣 逯鹏[3] 吴金团 关健 乔浩玥 WANG Jian;QI Yongsheng;LU Peng;WU Jintuan;GUAN Jian;QIAO Haoyue(Tianjin Municipal Key Lab of Civil Building Structure Protection and Reinforcement,Tianjin Chengjian University,Tianjin 300384,China;School of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China;MCC Construction Research Institute Co.,Ltd.,Beijing 100088,China;Technical Center,China State Construction Engineering Corporation,Beijing 101300,China)

机构地区：[1]天津城建大学天津市土木建筑结构防护与加固重点试验室,天津300384 [2]天津城建大学土木工程学院,天津300384 [3]中冶建筑研究总院有限公司,北京100088 [4]中国建筑股份有限公司技术中心,北京101300

出　　处：《振动与冲击》2022年第5期235-242,250,共9页Journal of Vibration and Shock

基　　金：天津市自然科学基金(17JCYBJC22300,18JCQNJC08300,18JCYBJC90800);道路结构与材料行业重点实验室基金项目(310821171114);天津市交通运输科技发展计划项目(2014KYJJQL23);天津市教委科研计划项目(2017KJ047);天津城建大学教育教学改革与研究项目(JGYBZ-1924)。

摘　　要：在滑移理论的基础上,通过COMSOL软件建立带有双螺旋线的斜拉索圆柱绕流模型,得到斜拉索的风压力系数和风摩擦系数。忽略斜拉索在横风向上的振动,通过改变风向得到在不同截面下带有双螺旋线的斜拉索受到的气动力,进而求得斜拉索的振动时程曲线及其频谱分析结果。结果显示,双螺旋线的存在抑制了水线在斜拉索表面的振荡,使得斜拉索在横风向受到的拉索气动力变化范围逐渐缩小,气动力的振荡频率远大于斜拉索的自振频率,降低了水线与斜拉索产生共振的可能性,从而抑制了斜拉索的风雨激振现象。Here, based on the slip theory, the model of cylinder flow around a stay cable with double helix was established using the software COMSOL, and wind pressure coefficient and wind friction coefficient of stay cable were obtained. Ignoring stay cable vibration in cross-wind direction, the aerodynamic force of stay cable with double helix under different cross-sections was obtained by changing wind direction, and then the vibration time history curve and spectral analysis results of stay cable were obtained. The results showed that the existence of double helix suppresses the oscillation of waterline on stay cable surface, and gradually reduces the variation range of aerodynamic force of stay cable in cross-wind direction;the oscillation frequency of aerodynamic force is much larger than natural vibration frequency of stay cable to reduce the resonance possibility of waterline and stay cable, and suppress the wind rain-induced vibration phenomena of stay cable.

关 键 词：风雨激振 气动减振 螺旋线 滑移理论 水线 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]