Hydrodynamic Analysis of Rigid-Flexible Composite Structure of Large Aquaculture Platform Subjected to Waves

Abstract

Deep-sea aquaculture cages have an important role in the marine fishery development process. With the increase of the sea depth, the sea conditions will be worse, as waves ups and downs, the stability performance of the cages decreases obviously. As the deep sea water is far away from the land, the environment is complex and changeable and the poor mobility of the system, all these factors can bring great economic losses to the aquaculture practitioners. Compared to the traditional cage system, the large aquaculture platform is more prominent. The aquaculture platform is composed of flexible bodies and slender rigid components. As the flexible bodies and the slender rigid components are coupled with each other, the response of the whole system is very complicated. For such a complex ocean system structure, the numerical simulation in the initial design stage can greatly speed up the design process and save many experimental resources. The aquaculture platform has been discretized into a lumped mass model based on the unique properties of a particular sea state and an aquaculture platform, and OrcaFlex has developed a dynamic simulation approach based on those parameters. With the change of the wave direction, the real-time response of the 6.8 thousand tons aquaculture platform under different wave directions has been realized. The dynamic response of the mooring system under different wave directions is obtained. The findings offer a theoretical foundation for the optimal aquaculture platform design.