中南大学学报（自然科学版）2025，Vol.56Issue(4)：1385-1396,12.DOI:10.11817/j.issn.1672-7207.2025.04.011
竖板状附属设施高度对扁平箱梁气动特性的影响
Effects of vertical plate-like attachments height on aerodynamic characteristics of flat box girder
摘要
Abstract
Vertical plate-like attachments such as wind barriers,railings,water-filled barriers and maintenance rails set on the bridge deck were simplified as vertical plates.The aerodynamic characteristics of flat box girders with different heights of vertical plates were investigated based on the numerical simulations and wind tunnel tests.The flow pattern,pressure distribution,lift force coefficient and Strouhal number were analyzed by changing the height of vertical plates h.The results show that with the increase of h/D,the flow patterns around the flat box girder can be roughly divided into three categories.When h/D is 0-0.1,the leading edge separation flow reattached stably,and the flow field is dominated by the Karman vortex.With the increase of h/D,the dimensionless Strouhal number St' based the overall model height D'(D'=h+D)decreases.When h/D is 0.2,the leading edge separation flow on the upper surface impinges the downstream vertical plate,corner vortex generated by the overhead-driven flow appears near the vertical plate while the St' is the smallest.When h/D is 0.4-1.0,the flow separated at the leading edge is no longer reattached.The flow field between the vertical plates is controlled by the main vortex and the two corner vortex upstream and downstream.At the same time,separation bubble occurs on the lower surface of leading wind fairing.The St' increases with the increase of h/D.In particular,two St' exist when h/D is 0.8-1.0,the larger one is related to the wind pressure frequency of the pressure tap near the downstream corner vortex,while the smaller one corresponds to the wind pressure frequency of the pressure tap on the lower surface of the model's trailing edge.关键词
竖板状附属结构/扁平箱梁/气动特性/风洞试验/大涡模拟Key words
vertical plate-like attachment/flat box girder/aerodynamic characteristics/wind tunnel test/large eddy simulation分类
交通工程引用本文复制引用
李策,王汉封,李欢,何旭辉..竖板状附属设施高度对扁平箱梁气动特性的影响[J].中南大学学报（自然科学版）,2025,56(4):1385-1396,12.基金项目
国家自然科学基金资助项目(52208514,52327810) （52208514,52327810）
湖南省自然科学基金资助项目(2024JJ4063) （2024JJ4063）
腾讯基金资助项目(探索奖2021)(Projects(52208514,52327810)supported by the National Natural Science Foundation of China （探索奖2021）
Project(2024JJ4063)supported by the Natural Science Foundation of Hunan Province （2024JJ4063）
Project(Xplorer Prize 2021)supported by the Tencent Foundation) （Xplorer Prize 2021）
