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This study aims at predicting the hydrodynamic response of an offshore AHTS vessel in regular and irregular waves. The study focuses on predicting the six degrees of freedom responses for ship in the operation condition when ship speed is equal to zero, at various heading angles (0, 45, 90, 135, 180, 225, 270, and 315˚) and for several wave frequen...
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This study case concerns the prediction of the hydrodynamic response of an offshore heavy lift barge in the regular and irregular waves. The study focuses on predicting the six degrees of freedom responses for the barge in the operation condition when the ship speed is equal to zero, at various heading angles (0~180˚) and for several wave frequenci...
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... This study proposes the use of the simplest model of heavy lift vessel, being in the form of an almost box-shaped barge as an initial study for a further investigation that will be carried out by the authors soon, following a series of investigations that were carried out for the offshore oriented ship types, such as the Anchor Handling Tug Supply (AHTS) and the Offshore Supply Vessel (OSV) [1,2]. The analysis is concerned with the stability of the barge during the operational process and its performance in open seas. ...
This study case concerns the prediction of the hydrodynamic response of an offshore heavy lift barge in the regular and irregular waves. The study focuses on predicting the six degrees of freedom responses for the barge in the operation condition when the ship speed is equal to zero, at various heading angles (0~180˚) and for several wave frequencies (0.02~2.0 rad/s). The numerical simulation is carried out using the 3D diffraction /radiation motion solver Hydrostar software that is based on potential theory to predict the wave-body interactions. All the hydrostatics, loading and sailing aspects are initially estimated, and then introduced as an input in the simulation process corresponding to the ship speed and heading directions. For the irregular sea simulations, the ITTC spectrum is used to describe the wave for a generic study case in the Black Sea to make the study feasible for offshore applications in operational conditions where the ship speed is equal to zero.
