基于Rhino和Flow-3D耦合的串列四桥墩局部冲刷数值模拟  

Numerical Simulation of Local Scour of Tandem Four Piers Based on Rhino and Flow-3D Coupling

作　　者：王紫麒 路明[1,2] 郭志宇 杨钧午 梁海娇 王琪 WANG Zi-qi;LU Ming;GUO Zhi-yu;YANG Jun-wu;LIANG Hai-jiao;WANG Qi(School of Water Conservancy and Hydroelectric Power,Hebei University of Engineering,Handan 056038,China;Hebei Key Laboratory of Intelligent Water Conservancy,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]河北工程大学河北省智慧水利重点实验室,河北邯郸056038

出　　处：《水电能源科学》2024年第8期65-69,167,共6页Water Resources and Power

基　　金：河北省自然科学基金项目(E2019402102)。

摘　　要：针对复杂地形下串列四排桥墩局部冲刷问题,以洺河京港澳高速桥6号桥组为研究对象,以不同泥沙级配及中值粒径表征非均匀沙质河床及来沙条件,考虑泥沙水下休止角等影响因素,通过建模软件Rhino耦合Flow-3D开展三维数值模拟研究,得到串列四排桥墩周围流场结构及冲坑演变过程。将模拟得到的流速值和冲深值与物理试验结果对比,相对误差均在10%以内,表明构建的数学模型能够较好地实现复杂地形下非均质河床的四排桥墩局部冲刷数值模拟。模拟方法可为类似三维曲面数值模拟研究提供参考,对于识别桥墩周围水流结构和冲刷特性、指导桥梁规划设计具有重要的参考价值。Aiming at the local scour problem of four-row piers in series under complex terrain,the No.6 Bridge Formation of Beijing-Hong Kong-Macao high-speed bridge on the Ming River was taken as the research object.The non-uniform sandy riverbed and incoming sand conditions were characterized by different sediment gradations and median particle sizes.Considering the influencing factors such as the underwater repose angle of sediment,three-dimensional numerical simulation research was carried out through the modeling software Rhino coupled Flow-3D.The flow field structure around the four-row piers in series and the evolution process of the scour pit were simulated.Comparing the simulated flow velocity value and scour depth value with the physical test results,the relative error is within 10%,indicating that the constructed mathematical model can better realize the numerical simulation of local scour of four rows of piers in heterogeneous riverbed under complex terrain.The simulation method can provide reference for similar three-dimensional surface numerical simulation research,which has important reference value for identifying the flow structure and scour characteristics around the pier and guiding the bridge planning and design.

关 键 词：RHINO Flow-3D 四排桥墩 局部冲刷 数值模拟 

分 类 号：TV135[水利工程—水力学及河流动力学] U443.22[建筑科学—桥梁与隧道工程]