摘要
基于计算流体力学(CFD)方法,利用商业软件FLUENT计算风对桥梁的静力作用,以一大跨桥梁的扁平箱梁为模型,分别以Realizable k-ε和SST k-ω湍流模型建立流场,提取不同攻角下的桥梁三分力系数,与物理风洞试验数据进行对比,给出主梁断面周围流场的压强与速度分布图并进行分析。结果表明:数值模拟结果与风洞试验结果基本吻合,其结果精度能满足工程上的需求,进一步验证CFD能较为精确的数值模拟主梁断面的三分力系数并且在显示流体流动方面有极大的优越性。
A novel computational fluid dynamics （CFD） method was proposed; the static effect on bridge pro- duced by wind was computed. With a model of a flat box girder of long span Bridges, the flow field was estab- lished with Realizable k-epsilon and SST k-omega turbulence model, the bridge three component coefficient was extracted under different Angle of attack and compared with physical wind tunnel test data, what is more, stress nephogram motion pattern around the main girder cross section in the flow field is drew. The results show that the numerical simulation result was consistent with the results of wind tunnel test, the precision of numerical simula- tion result can satisfy engineering demand. It concluded that aerodynamic force coefficient of bridge section could be simulated accurately by CFD method and it shows great advantage in according to fluid flow over other method.
出处
《贵州大学学报（自然科学版）》
2017年第2期128-133,共6页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金项目资助(51168010)
关键词
三分力系数
CFD
数值模拟
桥梁断面
coefficient of three component
CFD
numericalsimulation
bridgesection
