Numerical simulation on the mechanical properties of marine float

Abstract As the key structure of buoyancy and dynamic lift generation, the float is one of the most important attachments of the fishing gear in ocean fishery. For the special work environment, the float may deform and move under the hydrodynamic force when it works. At the same time, the motion may cause the impacting action from fluid and structures around. Then the investigation of the mechanical behavior of the float is of important significance for the structural design and performance optimization of the fishing gear, and even for the development of the ocean fishery. The three-dimensional numerical model of marine float working in the flow field was established based on the Computational Fluid Dynamics (CFD) method and the finite element (FEM) method according to the structural form and the mechanical characteristics in operation. The hydrodynamic performance and impact resistance were analyzed, and the response mechanism of float structure under the action of hydrodynamic load and impact load was summarized. It aims at providing basic theory support for the structure design and optimization of marine float and the related fishing gear.