Research On Hydroelasticity Due To Bottom Slamming On Ship Structure

With the development of industry and the need of ocean resources exploiting, various new type ships and ocean structures are coming fourth. Many problems came down to the interaction of fluid and structure, namely the structures form deformation due to the impact loading on the structures which the interaction of fluid generate, on the contrary, this deformation and the velocity of the mean deformation resulted in the changes of the flow field. It was a example for the stiffened plating between two transverse on each side of the keel. Research on hydroelasticity due to bottom slamming on ship structure was emphasized and significant.In this thesis, it consisted of both theoretical calculation and simulation study.In theoretical analysis, Orthotropic plate theory was used for the hull bottom structure based on the elementary plate theory. The stiffness coefficients were derived. The effect of the mean velocity and acceleration of structural on the fluid flow incorporated by solving the two-dimensional Laplace equation in the cross-sectional flow effects. So the coupled equation of the interaction was established between fluid and structure. It was solved by the Vlasov/Galevkin's method. Compared the strain values which were worked out by program with those experimented, The validity of the theory and feasibility of the program were verified. At the same time, a comparison of the results of elastic behavior calculation in the different positions was carried out ,In addition, the influence of elastic effects was demonstrated.In simulation study, The structural response was solved by the finite element ABAQUS software which was applied to the contact pair...