东南大学学报（自然科学版）2025，Vol.55Issue(5)：1373-1379,7.DOI:10.3969/j.issn.1001-0505.2025.05.018
中央稳定板对流线型箱梁颤振"等效风攻角"影响研究
Influence of central stabilization plates on the flutter"equivalent wind attack angle"of streamlined box girders
摘要
Abstract
To improve flutter performance and optimize the cross-sectional aerodynamic shape of the bridge under complex wind attack angle,a long-span suspension bridge with a main span of 1 760 m was selected as the research object.A section model wind tunnel test method was adopted to systematically measure the three-component force coefficients and vortex-induced vibration responses of the original section and opti-mized sections equipped with upper central stabilization plates of varying heights.The flutter critical wind speeds were tested within the wind attack angle range from-7° to 7°.Based on the observed test phenom-ena,the effect of the"equivalent wind attack angle"and its application method were proposed and ana-lyzed.The results indicate that the addition of upper central stabilization plates has limited influence on the section three-component force coefficients and vortex vibration performance,but effectively shifts the flutter"equivalent wind attack angle"of the streamlined box girder from-3° in the original state to 0°.This shift enhances the flutter critical wind speed under the actual incoming flow's wind attack angle at the bridge site.The mechanism by which upper central stabilization plates improves flutter stability through the regula-tion of the"equivalent wind attack angle"is revealed.A coupling mechanism between aerodynamic shape optimization and performance improvement is established,which can serve as an engineering application ex-ample.关键词
流线型箱梁/颤振临界风速/等效风攻角/大风攻角/气动措施/中央稳定板Key words
streamlined box girder/flutter critical wind speed/equivalent wind attack angle/gale attack angle/pneumatic measures/central stabilization plates分类
交通工程引用本文复制引用
张明金,颜庭辕,吴联活,张洪瑞,秦竟熙,李永乐..中央稳定板对流线型箱梁颤振"等效风攻角"影响研究[J].东南大学学报（自然科学版）,2025,55(5):1373-1379,7.基金项目
国家自然科学基金面上资助项目(52278533). （52278533）
