台风浪风暴潮作用下三维泥沙数值模拟  

Three-dimentional numerical simulation of sediments under actions of typhoon waves and storm surges

作　　者：朱志夏 熊伟 ZHU Zhixia;XIONG Wei(China Design Group Co.,Ltd.,Nanjing 210014,China;Zhejiang Keepsoft Information&Technology Corp.,Ltd.,Hangzhou 310051,China)

机构地区：[1]中设设计集团股份有限公司,江苏南京210014 [2]浙江贵仁信息科技股份有限公司,浙江杭州310051

出　　处：《哈尔滨工程大学学报》2020年第3期332-339,共8页Journal of Harbin Engineering University

基　　金：国家高技术研究发展计划(2012AA112509).

摘　　要：针对台风浪风暴潮作用下三维泥沙数值模拟问题,本文提出了波流共同作用下三维泥沙数值模拟技术。基于三重网格嵌套超高分辨率的“韦帕”台风风场,应用第三代波浪模型、二维潮流模型和三维水动力泥沙模型FVCOM以及非结构化网格的二维、三维三重嵌套的方法,经2次开发,解决了波流耦合、波生流的计算,并增加了波浪对泥沙运动、絮凝沉降和高含沙量时的制约沉降机制等影响,建立了台风作用下波浪潮流耦合三维泥沙数学模型。模拟计算了2007年“韦帕”台风作用下连云港海域三维泥沙输移过程,2#测站的分层含沙量过程的计算值与实测值吻合良好,主航道的回淤强度与实测较为一致。进行了连云港港不同布置方案的计算。研究结果表明:旗台港区和徐圩港区港池内回淤均较小;连云港主航道和徐圩进港航道最大回淤强度分别约为0.40 m和0.30 m,不存在骤淤问题。研究成果可为连云港港30万t级航道工程的设计提供技术支持。This study aims to solve the problem of 3-D numerical simulation of sediments under the action of a typhoon wave and a storm surge,proposing a novel technique.First,based on the typhoon“Wipha”wind field of a high-resolution,triple-nested grid system,the third generation wave model,2-D tidal current model,3-D hydrodynamic and sediment model FVCOM,and unstructured 2-D and 3-D grid triple-nested grid model were applied to the simulation.By the secondary development of the technique,emphasis was on the calculation of the wave-current coupling and wave-induced current.The influence of the wave on sediments′movement,flocculation settlement,and restrictive settlement mechanism of high sediments concentration is increased,setting up the wave-current coupled 3-D mathematical model of sediments under the action of the typhoon.Further,the 3-D sediments transport process of the Lianyungang sea area under the influence of the typhoon“Wipha”in 2007 was simulated and calculated.The calculated value of the stratified sediments concentration process of the measuring station Number 2 is in good agreement with the measured value,and the siltation intensity of the main channel is relatively consistent with the measured value.Finally,the calculation of different layout plans of the Lianyungang port is carried out:the siltation intensity in the basin of the Qitai and Xuwei ports is small;the maximum siltation intensity of the Lianyungang main channel and Xuwei entry channel is about 0.40 m and 0.30 m,respectively,and no sudden siltation problem is observed.This study can provide technical support for the design of the 300000-t-channel project of the Lianyungang port.

关 键 词：台风浪 波流耦合 二次开发 絮凝沉降 制约沉降 三维泥沙模型 

分 类 号：TV149[水利工程—水力学及河流动力学]