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Hydroelastic analysis of two dimensional slamming phenomena (Contributo in atti di convegno)

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Hydroelastic analysis of two dimensional slamming phenomena (Contributo in atti di convegno) (literal)

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A. Iafrati^1, A. Carcaterra^1, E. Ciappi^2, E.F. Campana^1 (1999)
Hydroelastic analysis of two dimensional slamming phenomena
in Seventh International Conference on Numerical Ship Hydrodynamics, Nantes (FR), 19-22 Luglio 1999
(literal)

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^1 INSEAN, ^2 Department of Mechanics and Aeronautics, University of Rome \"La Sapienza\" - Roma (literal)

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In this paper the hydroelastic interaction during the impact of a two mass oscillator over the water surface is analyzed. The system consists of a massive wedge, plunging the free surface, elastically connected to a carried mass. When the wedge impacts, the system is excited by the pulse hydrodynamic force and an oscillatory coupled motion takes place. The attention is focused on a parametric analysis of the maximum of both hydrodynamic and elastic forces originated by the collision. A simplified theoretical model is proposed starting from the slamming force estimated by similarity solutions of an impacting flat plate. This model is validated by comparisons with a numerical simulation of the fluid-structure interaction. The unsteady potential flow is computed through a boundary elements formulation and a fully non linear boundary condition is applied on the free surface. The hydrodynamic load is then used to force the dynamic system. A good agreement between numerical results and theoretical estimate has been found validating the simplified model. (literal)

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