规则波下半潜式养殖网箱耦合动力响应-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Coupled Dynamic Response of a Semi-Submersible Aquaculture Cage Under Regular Waves

作者:: 李政宏1; 2; 刘建闽1; 2; 张晓莹1; 2; 扈喆1; 2; （1.厦门市海上养殖装备重点实验室，福建厦门 361021;2.集美大学轮机工程学院，福建厦门 361021）

Author(s):: LI Zhenghong1; 2; LIU Jianmin1; 2; ZHANG Xiaoying1; 2; HU Zhe1; 2; （1.Xiamen Key Laboratory of Mariculture Equipment,Xiamen,361021,China;2.School of Marine Engineering,Jimei University,Xiamen,361021,China）

Keywords:: deep-sea aquaculture platform; multi-system coupling; net load; hydrodynamic response

摘要:: 随着水产养殖从近海发展至深远海，半潜式养殖网箱因其在恶劣海况下仍具结构稳定性而得到广泛关注，其水动力性能研究具有重要的工程意义。现有研究多基于单一网衣模型开展耦合分析，缺乏不同网衣模型对养殖平台响应影响差异的系统研究。本文针对浮体框架、网衣与多点系泊系统组成的半潜式养殖平台，基于势流理论与Morison方程，结合网目群化法与集中质量法，建立浮体—网衣—系泊系统耦合数值模型，在规则波及波流工况下，研究半潜式网箱的运动响应与锚链拉力随浪向角变化的规律。结果表明：与刚性网衣模型相比，柔性网衣模型由于载荷效应更明显，预测网箱的纵荡和纵摇响应更大；柔性网衣会放大环境载荷主导方向上的平台漂移，减弱非主导方向上的平台漂移，而刚性网衣则呈现相反趋势。

Abstract:: With the expansion of aquaculture from nearshore to deep-sea areas,semi-submersible aquaculture cages have garnered widespread attention due to their structural stability under harsh sea conditions.Consequently,investigating their hydrodynamic performance is of significant engineering importance.Existing studies often neglect the influence of flexible nets on the coupled dynamic response of the cage.To address this,this paper focuses on a semi-submersible aquaculture platform comprising a floating frame,flexible nets,and a multi-point mooring system.Based on the potential flow theory and the Morison equation,combined with the mesh grouping method and the lumped mass method,a coupled numerical model of the floater-net-mooring system is established.Under regular wave and combined wave-current conditions,the motion responses of the semi-submersible cage and the variations in mooring line tension with different wave heading angles are investigated.The results demonstrate that,compared to the rigid net model,the flexible net model exhibits more pronounced load effects,thereby predicting larger surge and pitch responses of the cage.Furthermore,the flexible net amplifies the platform drift in the dominant direction of environmental loads while attenuating the drift in non-dominant directions.Conversely,the rigid net model exhibits the opposite trend.