Analysis Of The Coupling Effect Between Tank Liquid Sloshing And Flexible Anti-sloshing Structure

With the development and utilization of marine resources,the safety of marine transportation has also aroused widespread concern.During the transportation of tank,liquid sloshing will happen induced by external excitation.Sloshing could cause impact pressure acting on the wall of tank.In serious cases,the tank is damaged and the liquid is leaked and the ocean will be polluted.Based on the viscous flow theory and the CFD software ANSYS16.0,the fluid-structure interaction of tank sloshing and anti-sloshing structures are analyzed.The main work of this thesis is as follows:(1)The liquid sloshing problem was briefly introduced,and the research status of fluid-structure interaction between liquid sloshing and structure at home and abroad was reviewed and summarized.(2)Based on the theory of hydrodynamics and structural dynamics theory,the fluid-solid coupling mathematical model for the interaction between liquid sloshing and anti-sloshing structures of storage tanks was established,including the incompressible continuity equation and N-S equation,as well as the free liquid surface and wall boundary conditions.(3)The numerical simulation of the sloshing in a rectangular tank was performed.The calculation results are compared with the experimental ones to verify the feasibility and effectiveness of the numerical simulation method.(4)The liquid sloshing model of storage tank was established to analyze the effect of changing the height of the anti-sloshing structure on the liquid sloshing of the storage tank under different loading heights.The pressure of the pressure measurement point of the tank wall and the change of the free liquid surface were mainly analyzed.It was found that the higher the height of the anti-sloshing structure is,the more significant the anti-swaying effect is,when the ratio of the height of the baffle to the depth of liquid is 0.68,the free liquid level of the tank liquid changes very gently,and the anti-swaying effect of the anti-sloshing baffle is also closely related to the relative height of the baffle and the tank loading.(5)Numerical simulation of tank sloshing under different external excitations,mainly changing the frequency and amplitude of the external excitation.It was found that with the change of the external excitation,the anti-sloshing structure can play a good role in suppressing liquid sloshing.(6)By changing the internal anti-sloshing structure of the tank,the liquid sloshing of the tank was numerically simulated,It was found that the greater the anti-sway structure's elasticity is,the better the anti-swaying effect is.The change in the width of the anti-sway structure does not change the height of the liquid sloshing of the tank.The influence is large,and the influence of the shape of the anti-sloshing structure on the liquid sloshing of the tank is related to the loading height of the tank.