floating unit and method for reducing sigh movements and tilt / rotation of a floating unit

摘要

A floating unit (10) is disclosed comprising a single centre barrel (11) having a longitudinal centre axis (22). The central barrel comprises a lower main section (14) and an upper section (12) extending up from the main section (14) and having at least one outward facing side (20) which forms a flare angle () with the longitudinal axis (22). The upper section (12) penetrates a still water surface (30) when the floating unit is in use. The main section (14) of the floating structure (10) has an equivalent diameter (D), a still water draught (T) and a metacentric height (KM) which is given as a function of the diameter (D), the still water draught (T), the flare angle () and a variable part (x) of the draught which is a result of the motions of the floating unit (10) such that KM = (D,,,x). The flare angle () of the upper section ( 12 ) is within a range of ±20% of the flare angle which satisfies the equation d(KM(D,T,,x))/dx = 0.