筏式海水养殖设施在波浪作用下的水弹性分析  

Hydro-elastic analyses of a floating raft for marine aquaculture in waves

作　　者：张光明 储备 张尧 张新曙[1,2] ZHANG Guangming;CHU Bei;ZHANG Yao;ZHANG Xinshu(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China;National Marine Hazard Mitigation Service,Ministry of Natural Resources,Beijing 100194,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]高新船舶与深海开发装备协同创新中心,上海200240 [3]自然资源部海洋减灾中心,北京100194

出　　处：《海洋工程》2021年第6期67-77,共11页The Ocean Engineering

基　　金：自然资源部海洋减灾中心项目(2019004AC)。

摘　　要：由于台风等恶劣海洋条件的影响,海上浮筏式养殖结构极易遭受破坏。浮筏式海水养殖结构系统由多个浮子、连接走板和系泊缆组成。文中研究了不同走板材料对浮筏结构在波浪中动力响应的影响。通过基于势流理论的软件WAMIT计算获得了浮子的附加质量系数。利用海洋工程软件OrcaFlex计算模拟了浮筏结构在波浪中的时历响应,并分析比较了采用不同走板材料的浮筏结构在海浪中的水弹性差异。研究结果表明,木制浮筏相对新型高密度聚乙烯(high density polyethylene,简称HDPE)材料在波浪中受到的弯矩更大,可能更容易受到破坏。另外,对比分析了直接计算的结构最大响应和基于瑞利分布预测的最大响应值(MPM),结果表明结构最大垂向运动基本符合瑞利分布,而水平运动最大值由于受系泊系统非线性影响,与瑞利分布有一定差异。Exposed to the sea,the floating raft for marine aquaculture is subjected to the wave loads and may be damaged in the adverse sea conditions such as typhoons.The floating raft is composed of multiple buoys,connecting plates and mooring lines.We study the effects of the material of connecting plates on the hydro-elastic responses of the floating raft in waves.The added mass coefficient of the buoy is computed by the panel code WAMIT,based on the potential flow theory.OrcaFlex is adopted to simulate the hydro-elastic response of the floating raft in time domain,the responses of the floating raft constructed with different plates are compared.The results of the study indicate that the floating raft composed of wood plate is subjected to greater bending moment than that of the HDPE(high density polyethylene)material and may be more easily damaged.In addition,we compare and analyze the maximum responses of the structure directly simulated and those estimated by the most probable maximum(MPM)based on the Rayleigh distribution.The results show that the maximum vertical motion of the structure basically follows the Rayleigh distribution,while the maximum horizontal motion diverges from the Rayleigh distribution in some degree,which may attribute to the nonlinearity of the mooring system.

关 键 词：浮筏 系泊系统 水弹性 走板刚度 网箱养殖 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]