![]() Finally, the analytical expressions are validated by comparison with numerical results. Based on these simulations, closed-form expressions are derived for the resistant force according to the Upper-Bound theorem of plasticity. For each S.E, Ls-Dyna simulations are carried out. The ship is divided into large elements, called Super- Elements (S.E), representing the main bottom components. The seabed is represented by an elliptic paraboloid allowing to generate both sharp and shallow rocks varying two parameters. As part of the European research project FLARE (Flooding Accident REsponse), this PhD thesis aims to develop a solver based on simplified formulae to rapidly assess cruise ship grounding damage. The importance of wave and viscous damping is discussed taking as examples two different ship submarine impact scenarios.Īlthough non-linear finite element method is the most accurate approach for ship grounding damage analyses, its high computing cost makes it unsuitable when numerous scenarios have to be simulated. Using a new version of the rigid body dynamic program MCOL, the influence of hydrodynamic effects is highlighted in the ship-submarine collisions. In this paper, a rigid body large rotation formulation and new hydrodynamic models are presented. First, the difference of displacements between the two ships leads to large amplitude rotational motions for the submarine and secondly the viscous hydrodynamic forces which appear during the roll movement are great. ![]() Although ship-ship collisions have been widely studied, ship-submarine collisions are a particular case in that they exhibit two specific difficulties for researchers. Research work has been done for tanker collisions: this paper describes numerical methods and tools used in the simulation of a ship-submarine collision, with a focus on the outer collision dynamics, i.e. The continuous increase of maritime traffic makes the risk of collisions greater and several incidents have been reported during the last few years.
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