FE-MODELLING OF HYDRODYNAMIC HULL-WATER IMPACT LOADS

This paper considers finite element modelling of the hydrodynamic loads in hull-water impacts. The commercial FE-code LS-DYNA is used with a multi-material arbitrary Lagrangian-Eulerian formulation and a penalty contact algorithm. The great advantage of this modelling technique is that it enables the modelling of the instantaneous fluidstructure interaction. A difficulty is however the selection of appropriate modelling parameters. A method to rationally select appropriate modelling parameters is discussed and briefly described. Convergence of the pressure distribution is presented and discussed. Pressure distributions and loads are favourably compared with other theoretical methods and with experiments.