Liquid sloshing might cause severe impact on the container, leading to damage and destruction of the structures. It is widely believed that installing baffles in the container is one of the most effective ways to reduce violent liquid sloshing, based on which great efforts have been devoted in the investigations of liquid sloshing with baffles for decades. However, most of these existing investigations were focused on the effects of baffle type and fluid mechanism in the sloshing process. Despite that some researchers studied the large deformation of rubber baffles using weak-coupled algorithm, structural responses of the baffles considering hydroelastic effects were rarely paid attention to. This paper carries out a numerical study on the hydroelastic effects of the fluid-structure interaction (FSI) in a sloshing tank with baffles using a strong-coupled FSI algorithm. Firstly, numerical implementation of the numerical sloshing tank which solves the incompressible Navier-Stokes (N-S) equations using SIMPLE method, and the FSI method which solves the monolithically strong-coupled FSI equation using an implicit scheme are introduced. Secondly, grid-independence test and validation on sloshing load are carried out to determine the grid system and show the effectiveness on liquid sloshing using present method. Lastly, liquid sloshing in tanks with horizontal and vertical baffles considering hydroelastic effects are numerically studied. Structural responses of the baffles and sloshing loads on the baffles are obtained and analyzed with a fast Fourier transform (FFT) method, from which the hydroelastic effects are revealed and discussed.
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