The Mechanism And Numerical Computation Of Net Under Wave Loads

With the development of the world economy and the rapid increase in population,the resources and space available on land are increasingly difficult to meet people's growing production and living needs.Therefore,the development and utilization of marine resources is imperative.However,due to the limited marine aquatic resources,excessive fishing in some areas,and increased environmental pollution,ecological protection and energy conservation have attracted increasing attention.The natural aquatic resources in the offshore area are gradually depleted,and the marine aquaculture industrial structure is undergoing transformation,increasing the proportion of aquaculture and reducing fishing.Cage aquaculture in offshore aquaculture has gradually become the dominant aquaculture industry in the world.Cage aquaculture is developing in the distant seas and the scale is gradually expanding.Cages exposed to the marine environment are facing severe hydrodynamic loads.The overall design of the box structure puts forward higher requirements.Therefore,studying the hydrodynamic load of the net curtain structure under the wave load is of great significance for the design,production and development of cage culture.Based on the above background,this paper proposes a numerical method to calculate the dynamic response of the net curtain structure under wave load.The content includes the following aspects:1.Based on the Morison formula,the hydrodynamic calculation method of the net curtain structure(small-scale flexible member)is established.2.Designed and completed the hydrodynamic test of the net curtain structure.The force of the wave parameters on the deformation and hydrodynamic characteristics of the screen under the porosity is studied.3.Carried out the optimization research on the relaxation factor of the net curtain hydrodynamic calculation,obtained the high-efficiency relaxation factor of the overall deformation of the screen curtain,and improved the efficiency of the calculation of the screen curtain deformation.4.Using the visual analysis method of binocular imaging,the spatial deformation of the net curtain was extracted through physical model experiments,and a method for determining the equivalent elastic coefficient of the net curtain structure was established in combination with numerical simulation.