重庆大学学报2026，Vol.49Issue(5)：94-106,13.DOI:10.11835/j.issn.1000-582X.2025.039
L型导流板对钢箱梁涡振的影响及机理
Influence of L-shaped flow deflectors on vortex-induced vibration of steel box girders and underlying mechanisms
摘要
Abstract
To study the influence of L-shaped flow deflectors on the vortex-induced vibration(VIV)characteristics of steel box girders,a series of 20 test cases was designed.A sectional model wind tunnel test was carried out under a+5° wind attack angle to analyze the VIV response patterns associated with variations in horizontal plate width and vertical plate height.In parallel,computational fluid dynamics(CFD)simulations were performed,and the vortex structures were extracted using the Ω vortex identification method to reveal the underlying VIV evolution mechanism.The results show that increasing the horizontal plate width significantly enhances the suppression of vertical bending VIV,while shifting the VIV lock-in region toward higher wind speeds.In contrast,the vertical plate height strongly influences torsional VIV;larger heights tend to induce torsional vibration in the high wind speed regime.Flow field analysis shows that widening the horizontal plate reduces the spanwise extent of vortex structures,thereby improving flow uniformity.Conversely,increasing the vertical plate height promotes the formation and development of vortex clusters,leading to a more complex flow field.Effective vibration mitigation is achieved only when the vortices generated by the attached components are of a comparable scale to those shed from the main girder,enabling interference with the dominant vortex-shedding process.关键词
导流板/涡激振动/风洞试验/钢箱梁/CFDKey words
flow deflector/vortex-induced vibration/wind tunnel test/steel box girder/CFD分类
交通工程引用本文复制引用
李加武,曹晟阁,罗爽,杨鑫..L型导流板对钢箱梁涡振的影响及机理[J].重庆大学学报,2026,49(5):94-106,13.基金项目
国家自然科学基金资助项目(51978077).Supported by National Natural Science Foundation of China(51978077). （51978077）
