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Dynamics of marine vehicles

The prevision of ship behavior in non-linear conditions, being the most burdensome in terms of respect the human/environment/ship safety, is very hard task to undertake and still doesn't exists a robust and worldwide validated CFD procedure able to reproduce the full set of ship's motions in extreme conditions.
The scientific activities carried out in this unit are focused on the hydrodynamics's studies concerning the wave-ship interactions both for external (sea-keeping and manoeuvrability) and internal flows (sloshing) taking in due account also the research aspects related to the structural interactions and the large amplitude ship's motions occurring. Global aspects of the wave-ship interactions are investigated and local hydrodynamic phenomena critical for the rational fulfilling of the International Standards of safety at sea in heavy operative conditions (water on deck, slamming, sloshing) are analyzed. When maneuvering, the directional and the yaw stability characteristics are strongly influenced by the speed of the ship and the measurement of the motions either the lateral forces play a key role for the hydrodynamic characterization of the ship behavior.
For surface ships, in order to fulfill the International Safety requirements (IMO, NATO) is mandatory to evaluate the controllability/manoeuvrability characteristics already in a very early design stage. The experimental activities usually carried out via free-running self-propelled unmanned surface tests are able to provide those global parameters punctually and allows the naval architect to verify the effectiveness of different technical solutions in a very reliable and suitable way.