基于FUNWAVE-TVD模型的离岸养殖围网内外波浪场数值模拟研究  

Numerical Study on Wave Fields Inside and Around an Offshore Pile-Net Enclosure Structure Based on FUNWAVE-TVD Model

作　　者：辛连鑫 毕春伟[1] 赵云鹏[1] 陈洪洲 XIN Lianxin;BI Chunwei;ZHAO Yunpeng;CHEN Hongzhou(Dalian University of Technology,State Key Laboratory of Coastal and Offshore Engineering,Dalian,Liaoning 116024,China;Zhejiang Ocean University,School of Marine Engineering Equipment,Zhoushan,Zhejiang 316000,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]浙江海洋大学海洋工程装备学院,浙江舟山316000

出　　处：《渔业科学进展》2022年第6期1-10,共10页Progress in Fishery Sciences

基　　金：国家重点研发计划课题(2019YFD0900902);国家自然科学基金面上项目(31972843)共同资助。

摘　　要：本研究利用完全非线性Boussinesq数值模型FUNWAVE-TVD耦合多孔介质模型,建立了模拟围网波浪场的数值模型。将计算结果和实验数据进行对比分析,验证了该模型计算规则波在穿过网箱后传播过程的准确性。进一步研究了波高和周期等因素对围网内外波浪场特性的影响,探讨了围网波浪场特性与这些水动力因素的内在联系。结果显示,离岸养殖围网的存在使波浪场背浪侧出现衰减,波高衰减率受波浪周期影响较大,最大波高衰减达到93.3%。同时,较低频规则波的波高衰减区域呈辐射状趋势扩散,并随着波浪进一步传播,最大波高衰减位置开始向两侧扩散,围网背浪侧的波高衰减程度减小,波高有恢复趋势,而高频波浪的波高衰减区域则较为集中。本研究可为实际海域桩网围护的位置和构造提供分析依据。Aquaculture in offshore structures is an effective method for developing ocean ranching and meeting the increasing demand for marine produce and is one of the most promising ecological breeding structures. The offshore pile-net enclosure structure has wide application prospects owing to its large aquaculture volume, and its aquaculture environment is very similar to that of the natural environment. However, the existence of the pile and net structure will have a certain impact on the wave fields inside and around the pile net enclosure. Owing to the large scale of the pile-net enclosure structure, the structure significantly changes the original wave field in passing waves. Because of the complexity of the wave field at sea, construction site selection will have a significant impact on the safety of the purse seine structure. The pile-net enclosure structure also has an effect on the contents of nitrogen, phosphorus, heavy metals, and other substances in the area.Study of the impact of the pile-net enclosure structure on the original wave field is also of great significance for addressing environmental problems. Previous studies on pile-net enclosure structures have focused on the stress of the structure, and few studies have examined the impact of the structure on the original wave field in passing waves. Therefore, the propagation tendency of the pile net enclosure structure on the wave field in the original area under the action of waves and the hydrodynamic characteristics of the pile net enclosure were studied. This is of great significance for the structural design and site selection of the entire pile net enclosure. Based on the fully nonlinear Boussinesq equation and the numerical model FUNWAVE-TVD with shock capture ability, the propagation tendency of regular waves through a pile-net enclosure structure was studied. First, the wave was simulated based on the fully nonlinear Boussinesq equation. For a structure with large porosity, the pile-net enclosure structure was simplified as a porous medium model,

关 键 词：围网 波浪场 FUNWAVE-TVD模型 数值模拟 

分 类 号：TV13[水利工程—水力学及河流动力学]