基于FLOW3D的集成式水下基盘泥沙冲淤三维数值模拟  

Three-dimensional simulation of local sediment scour and deposition around the groove for integrated underwater foundation plate based on FLOW3D

作　　者：薛强 高博远 段辰宇 张子涵 陈同庆[2] 张庆河[2] XUE Qiang;GAO Boyuan;DUAN Chenyu;ZHANG Zihan;CHEN Tongqing;ZHANG Qinghe(CNOOC EnerTech Equipment Technology Co.Ltd.,Tianjin 300450,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China)

机构地区：[1]中海油能源发展装备技术有限公司,天津300450 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《水道港口》2024年第3期333-338,414,共7页Journal of Waterway and Harbor

基　　金：国家重点研发计划项目(2021YFB2601100);国家自然科学基金委联合基金项目(U1906231)。

摘　　要：泥面下集成式水下基盘是为开采渤海通航区等海域油气资源而提出的新型基盘,其基坑周围局部冲淤是工程实践关注的问题之一。基于不可压缩粘性流体运动的Navier-Stokes方程建立泥面下集成式水下基盘基坑周围三维水动力数学模型,对不同粒径和不同流速情况下的局部冲淤进行了模拟。结果表明:泥沙粒径为0.005 mm时,由于泥沙较难起动,基坑附近局部冲淤较小。粒径分别为0.05 mm和0.1 mm时,在典型流速作用下,基盘附近可分别形成1 m左右和4 m左右的淤积。The integrated underwater foundation plate are a new type of foundation plate proposed for the exploitation of oil and gas resources in sea areas such as the navigation area of Bohai Sea.Local scour and deposition around the foundation plate is of significant importance for the engineering practice.Based on the Navier-Stokes equation of incompressible viscous fluid motion,a three-dimensional hydrodynamic numerical model around the integrated underwater foundation plate was established,and the local sediment scour and deposition under different particle sizes and velocities were simulated.The results show that when the sediment particle size is 0.005 mm,the local scour and deposition around the foundation plate is small because the sediment is difficult to erosion.When the particle sizes are 0.05 mm and 0.1 mm,sediment deposition thickness in the foundation groove could be about 1 m and 4 m under the influence of typical flow velocity,respectively.

关 键 词：水下基盘 数值模拟 局部冲淤 三维水动力 冲刷 FLOW3D 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV143[交通运输工程—船舶与海洋工程]