A violent sloshing is an important issue for ocean engineering and naval architecture and also causes resonance phenomena with a partially filled tank. The violent sloshing is connected with important water-wall interactions and breaking phenomena This violent sloshing cannot be predicted by potential flow model. In this study, using SPH method, we applied the violent sloshing in a rectangular tank with the critical filling depth and verified these severe conditions. We also applied to the violent sloshing in an elastic tank and calculated the stress field and deformation when violent water wave acts on the elastic wall.
