Numéro : 2409 - Year : 2002

Slamming study on the Millenium series: model basin test/sea trails correlation

Johan BARRAUD, ALSTOM MARINE CHANTIERS DE L'ATLANTIQUE
Loïc MORAND, ALSTOM MARINE CHANTIERS DE L'ATLANTIQUE

During Millennium sea trials, first podded cruise liner built in Chantiers de l'Atlantique, a new phenomena caught everybody out by its scale on this kind of boat. It appeared to be some beam vibrations, generated by hydrodynamic loads (slamming) on the stem.

This could have generated, in particular conditions, uncomfortable feelings for cruise passengers. Neither in the ship specification nor in the classification rules the comfort problem linked to low frequency was treated.

In a short time schedule because ship millennium series' was under construction, we had to carry out several investigations to identify and quantify the phenomena: to define comfort standard, to carry out model test studies and correlate them with sea trials results, identify and apply the final solutions.

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