The Influence of the Bow Shape of FPSOs on Drift Forces and Green Water
Author Bas Buchner (Maritime Research Institute Netherlands MARIN)
Title The Influence of the Bow Shape of FPSOs on Drift Forces and Green Water
Conference/Journal Offshore Technology Conference (OTC), Houston
Paper no. OTC1996-8073
Month May
Year 1996

Abstract
In this paper the influence of the bow shape of FPSOs on drift forces and green water loading is studied, Use is made of the results of model tests and diffraction calculations for three different bow shapes: a traditional tanker bow, a sharp alternative bow without flare and the same alternative bow with a significant flare above the still waterline for the sharper alternative bows the mean wave drift forces and low frequency drift forces seem to be smaller than for a traditional bow. Due to the fact that the wave frequency motions with the alternative bows are larger, it is not clear yet whether the total mooring line loads for this type of vessels will be lower. For the alternative bows the relative motions around the bow are larger This results in more water on the deck with the alternative bows than with a traditional bow, Also the impact pressures are significantly higher. The results presented in this paper make clear that it is not sensible to optimize a bow of an FPSO on one aspect only.

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