同济大学学报（自然科学版）2025，Vol.53Issue(5)：669-676,8.DOI:10.11908/j.issn.0253-374x.24041
不同振动状态下矩形柱体展向相关性和相干结构数值模拟
Numerical Simulation of Spanwise Correlation and Coherent Structures of the Flow Around a Rectangular Cylinder Under Different Vibration States
摘要
Abstract
Vortex-induced vibration(VIV)exhibits distinct three-dimensional flow characteristics,which means that the unsteady aerodynamic forces and flow features in the spanwise direction are not fully synchronized and change with the vibration state.In this study,large eddy simulation(LES)combined with the dynamic mesh technique is employed to investigate the spanwise correlation of aerodynamic forces and velocities,as well as the evolution of the corresponding flow structures around a typical bridge section(a rectangular 5:1 cylinder)under different vibration states.It is concluded that during vibration,the correlation between aerodynamic forces and velocity initially first increases and then decreases,with the maximum correlation coefficient not corresponding to the state of maximum amplitude.The spanwise correlation coefficient of wake velocity is significantly smaller than that of aerodynamic forces,and among the three velocity components,the spanwise velocity exhibits the smallest correlation coefficient.The spanwise correlation structures of the flow field around the vibrating rectangular cylinder have clear larger scales compared to the stationary state.关键词
计算流体力学/大涡模拟/涡激振动/展向相关性/展向相干结构Key words
computational fluid dynamics/large eddy simulation(LES)/vortex-induced vibration(VIV)/spanwise correlation/spanwise coherent structures分类
力学引用本文复制引用
邹鹏程,曹曙阳,操金鑫..不同振动状态下矩形柱体展向相关性和相干结构数值模拟[J].同济大学学报（自然科学版）,2025,53(5):669-676,8.基金项目
国家自然科学基金(52478547) （52478547）
国家重点研发计划(2022YFC3005302) （2022YFC3005302）
