Hydroelasticity analysis of a vessel-shaped fish cage under incident,diffraction and radiation wave fields  

作　　者：Yihou Wang Shixiao Fu Torgeir Moan Yuwang Xu Tianhu Cheng 

机构地区：[1]State Key Laboratory of Ocean Engineering,SJTU,Shanghai,China [2]Centre for Autonomous Marine Operations and Systems(AMOS),NTNU,Norway [3]Faculty of Maritime and Transportation,Ningbo University,Ningbo,China

出　　处：《Journal of Ocean Engineering and Science》2023年第4期418-434,共17页海洋工程与科学（英文）

基　　金：National Natural Sci-ence Foundation of China (Grant No.52088102);National Sci-ence Fund for Distinguished Young Scholars (Grant No.51825903);the Fundamental Research Funds for the Central Universities,Key R&D program of Shandong Province (Grant No.2021SFGC0701);National Natural Science Foundation of China (Grant No.52271283 and Grant No.52111530135);State Key Labo-ratory of Ocean Engineering (Shanghai Jiao Tong University) (Grant No.GKZD010081);Shenlan Project (Grant No.SL2021MS018 and Grant No.SL2022ZD201);the Research Council of Norway through the centre of Excellence Funding Scheme (Grant No.223254).

摘　　要：Vessel-shaped fish cages are promising large aquaculture structures developed in recent years,with an overall length of nearly 400 m.In this paper,a coupled hydroelasticity model of a vessel-shaped fish cage is used to calculate the motion and structural response in the time domain.First,the floating body of the cage is discretized into a multimodule system to calculate the frequency-domain hydrodynamic loads.Then,the multimodule system is connected by equivalent elastic beams to consider the hydroelastic be-havior in the time domain.The hydrodynamic loads of the multimodule system are transformed from the frequency-domain loads.Moreover,based on the velocity field transfer functions and the motion of the multimodule system,coupling wave fields considering incident,diffraction and radiation waves are built and used to calculate the loads on the net and steel frame.By iterating the motion response of the multi-module system and the hydrodynamic loads on the net and steel frame in the time domain,the balanced hydroelasticity response of the whole cage is finally obtained.The results show that the hydroelasticity effects have a significant influence on the vertical displacement and cross-sectional load effects of the vessel-shaped fish cage.

关 键 词：Vessel-shapedfish cage HYDROELASTICITY Motion response Cross-sectional load effect Net twine tension 

分 类 号：P73[天文地球—海洋科学] U66[交通运输工程—船舶及航道工程]