The design of a harbour or a marina is primarily aimed to a safe and comfortable anchorage and to easy and efficient cargo-passengers operations [1-2]. Prevailing weather conditions and their extremes at the site determine thoroughly the design of the plan view and the height of the breakwaters. Nevertheless, even in not extreme conditions, the geometry of the harbour can affect directly the onset and grow of standing or partially standing waves inside it, inducing large rolling, surge and yaw of the moored vessels with exceeding stresses on the mooring lines and causing the interruption of up-downloading operations. In this paper we investigate the free surface oscillations in an arbitrary shaped harbour by means of a Time Domain Simulation tool developed at DINMA [3-4] in the frame of the so-called Numerical Wave Tank approach. The method proposed here is able to handle the bottom bathymetry, so that the important refraction effects can be taken into account. The capability of the method is first checked in the case of 2 harbours with simple rectangular plan shape. Afterwards the method is applied to the harbour of Trieste (Italy-North Adriatic Sea) with regular waves coming from Southwest in open sea and from West at the harbour opening. In particular the study is focussed on the magnification of the wave amplitude due to the change of the main dimension of a large pier planned to berth cruise ships.

A DBIEM Analysis of Free Surface Oscillations in Harbours of Arbitrary Geometry

CONTENTO, GIORGIO
2002-01-01

Abstract

The design of a harbour or a marina is primarily aimed to a safe and comfortable anchorage and to easy and efficient cargo-passengers operations [1-2]. Prevailing weather conditions and their extremes at the site determine thoroughly the design of the plan view and the height of the breakwaters. Nevertheless, even in not extreme conditions, the geometry of the harbour can affect directly the onset and grow of standing or partially standing waves inside it, inducing large rolling, surge and yaw of the moored vessels with exceeding stresses on the mooring lines and causing the interruption of up-downloading operations. In this paper we investigate the free surface oscillations in an arbitrary shaped harbour by means of a Time Domain Simulation tool developed at DINMA [3-4] in the frame of the so-called Numerical Wave Tank approach. The method proposed here is able to handle the bottom bathymetry, so that the important refraction effects can be taken into account. The capability of the method is first checked in the case of 2 harbours with simple rectangular plan shape. Afterwards the method is applied to the harbour of Trieste (Italy-North Adriatic Sea) with regular waves coming from Southwest in open sea and from West at the harbour opening. In particular the study is focussed on the magnification of the wave amplitude due to the change of the main dimension of a large pier planned to berth cruise ships.
2002
9780000000002
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2299665
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