湖南大学学报（自然科学版）2024，Vol.51Issue(7)：95-110,16.DOI:10.16339/j.cnki.hdxbzkb.2024071
安装肋条斜拉索的涡激振动和气动力特性研究
Study on Vortex-Induced Vibration and Aerodynamic Force Characteristic of Stay Cables with Ribs Installed
摘要
Abstract
Hence,further investigation is needed.Taking the stay cables with ribs installed as the object,a series of wind tunnel tests were conducted to systematically study the effects of the installation methods(through-length installation and intermittent staggered installation),sizes and numbers of ribs on the VIV,and aerodynamic force.Additionally,the suppression mechanism of vortex-induced vibration(VIV)was analyzed.Results show that stay cables with ribs can effectively suppress VIV compared with standard stay cables.The intermittent staggered installation exhibits a better vibration suppression effect than the through-length installation.The control effect was better for 8 ribs than for 6 and 12 ribs.Increasing rib width and thickness can reduce the amplitude of VIV.The fluctuating lift coefficients of the stay cables with ribs are remarkably smaller than those of the standard stay cables.Moreover,the amplitudes of the power spectrum peaks are significantly reduced,or the peaks are even vanished.This suggests that intermittent staggered rib can weaken the strength of Karman vortex shedding or even control it completely.For aerodynamic forces,the Reynolds number effect on the mean aerodynamic coefficient is significantly weakened by the ribs.Compared to standard stay cables,the installation of ribs throughout the entire length increases the mean drag coefficient of the stay cables.When the installation is intermitte staggered,the increase and decrease in the drag varies with the number and size of ribs and the wind attack angle.When the ribs with the size of 20mm×15mm and the number of 8 are intermittently staggered,good vibration suppression effects can be obtained at all wind attack angles.The maximum reduction of VIV amplitude can reach 96.79%,the mean drag coefficient is near 1.13,and the mean lift coefficient is near 0.关键词
斜拉索/肋条/风洞试验/涡激振动/气动力特性Key words
stay cables/ribs/wind tunnel test/vortex-induced vibration(VIV)/aerodynamic force characteristic分类
交通工程引用本文复制引用
刘庆宽,韩鹏,孙一飞,褚泽楷,王滨璇,李凯文..安装肋条斜拉索的涡激振动和气动力特性研究[J].湖南大学学报（自然科学版）,2024,51(7):95-110,16.基金项目
河北省自然科学基金创新研究群体项目(E2022210078),Innovation Research Group Project of Natural ScienceFoundation of He-bei Province of China(E2022210078) （E2022210078）
中央引导地方科技发展资金项目(236Z5410G),Central Leading Local Science and Technology Devel-opment Fund Project(236Z5410G) （236Z5410G）
河北省高端人才项目(Grant No.[2019]63),High-end Talents Project of Hebei Province of China(Grant No.[2019]63) （Grant No.[2019]63）
石家庄铁道大学研究生创新资助项目(YC2023054),Postgraduate Innovation Project of Shijiazhuang Tiedao Univer-sity(YC2023054) （YC2023054）
