摘要
为分析不同工况下箱型主梁水动力特性的变化规律,采用孤立波与海流联合模式模拟计算了极端海况。以某沿海近岸大桥为模型,利用Fluent仿真软件,结合SST k-ω湍流模型和VOF方法,对波流与桥梁结构在各种工况下的相互作用进行了数值模拟计算。通过绘制受力时程图、气液分布图、水质点速度云图等,对箱梁水动力特性进行了分析。结果表明:随着正向相对流速的增大,箱梁所受水平波浪力峰值逐渐增大,而竖直力峰值逐渐减小,且峰值对应的时间提前;同时,随着波高的增加,箱梁在水平方向和竖直方向所受波浪力峰值呈增大的趋势,并且波浪冲击下,箱梁截面迎波面一侧的水位差增大,导致箱梁迎波面所受竖直方向的抨击力显著增强。
Solitary waves and ocean currents are used to simulate extreme sea conditions,and the changing law of hydrodynamic characteristics of box-type main girder under different working conditions is investigated.Taking a coastal near-shore bridge as a model,using Fluent simulation software,based on SST k-ωturbulence model and VOF method,numerical simulation is carried out to simulate the role of wave current and bridge structure under various working conditions,and comparing the time course diagram of force,air-liquid distribution diagram,velocity cloud diagram of water quality points and so on,hydrodynamic characteristics of the box girder are analysed.The results show that:with the increase of forward relative flow velocity,the peak value of horizontal wave force on box girder gradually increases;the peak value of vertical force on box girder gradually decreases,and the corresponding time of peak value is advanced.With the increase of wave height,the peak wave force on the box girder in both horizontal and vertical directions increases,and the water level difference on the wave-facing side of the box girder cross-section brought about by wave impact increases,and the vertical slamming force on the wave-facing side of the box girder increases significantly.
作者
黄雯
林枫
易伟清
林华民
陈智勇
HUANG Wen;LIN Feng;YI Weiqing;LIN Huamin;CHEN Zhiyong(School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430070,China;Xianyou County Construction Investment Group Co.,LTD.,Putian 351200,China;Fujian Fanshi Construction Group Co.,LTD.,Putian 351119,China)
出处
《海岸工程》
2024年第3期194-205,共12页
Coastal Engineering
基金
福建省住建厅科技研究项目(2022-k-17)
湖北省住房和城乡建设厅科技计划项目(厅头〔2022〕2198号-49)。
关键词
海流
孤立波
箱梁
数值模拟
水动力特性
currents
solitary wave
box girder
numerical simulation
hydrodynamic property
