Experimental and numerical hydrodynamic investigations were carried out on a 1:45 scale model of a novel non-ship-shaped floating, production, storage, and offloading (FPSO) vessel that has been designed for use in the icy waters of the Arctic as well as the severe sea states of the North Sea. This FPSO vessel has a turret mooring system that is disconnectable during emergencies and inclement weather conditions. Experiments were conducted on a 1:45 scale model of the FPSO with damping plates consisting of skirt plates and different sizes of keel plates in order to study their influence on the response of the vessel. A numerical study of the scale model was carried out using the Wave Analysis at Massachusetts Institute of Technology code, and the results provided by it were compared with those obtained from model tests in the wave basin.
Floating Drilling Production Storage and Offloading vessels (FDPSO) are used for the production of oil from remote fields, where the installation of pipelines is uneconomical. Moonpool is the main characteristic of the FDPSO. Barges offer cheap way for transportation and lifting of offshore structures. Installation barges are often fitted with moonpool for functional purposes. Motions of trapped water inside the moonpool are a subject of study for researchers. In the present study numerical analysis of barge with and without moonpool were carried out using commercial software namely WAMIT and STAR CCM+. Two different configurations (circular and rectangular shape) of the moonpool were selected to study its effect on the motions of a barge. The oscillations of water inside the moonpool and its effects were also investigated. The numerical results show that the moonpool oscillation changes the response of a barge and also the vessel responses influence the moonpool oscillation. The sloshing mode was found to be dominating in the rectangular moonpool.
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