Conference paper Open Access

Fluid-structure interaction during the water impact at high horizontal velocity of a thick plate: experimental data and simplified modelling

Iafrati Alessandro

The elastic deformations of a flat rectangular plate generated during the water entry at high horizontal velocity are investigated both experimentally and theoretically by using a simplified model to derive the out-of-plane displacement as well as the strain everywhere on the plate. Tests were performed on an aluminum plate thick enough to ensure that the deformation was always within the elastic regime. Measurements are provided in terms of pressures, strains and total hydrodynamic loads. The simplified model is a combination of a fluid-loading model, providing the pressure distribution at any time, and a structural model, similar to that proposed in Szilard (2004) and used also in Faltinsen (1999). The model is validated and tuned in one test condition before applying it to the analysis of other test cases. It is found that, although rather simple, it provides very accurate estimates of the strains, aside from some limits occurring at the sides due to the difficulty in correctly representing the boundary conditions.

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