INFLUENCE OF LONG WAVES ON SHIP MOTIONS IN A LAGOON HARBOUR

Volker Barthel, Etienne Mansard

Abstract


A physical model study of a vessel moored inside a lagoon harbour was undertaken in order to optimize a breakwater layout that best reduces the penetration of long wave energy inside the lagoon. The longer the breakwater at the entrance: the smaller the surge motion inside the lagoon. A combination of a short breakwater at the entrance channel and a pair of groynes in front and in the rear of the vessel also led to an efficient reduction of the surge motion. However, cost estimates and evaluation of vessel manoeuvrability are required to make an optimal choice of the breakwater layout. The use of a deterministic approach in wave generation led to a quicker testing procedure.

Keywords


lagoon; harbor; long waves; ship motions

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