Ships – Floating platform
Patent
1994-03-28
1999-03-02
Avila, Stephen
Ships
Floating platform
B63B 3444
Patent
active
058757287
ABSTRACT:
A spar platform is provided comprising an essentially vertical cylindrical buoyant vessel, and a shroud surrounding the essentially vertical cylindrical vessel wherein the shroud comprises two essentially perpendicular intersecting sets of foam-filled fiberglass elements. In a preferred embodiment, the perpendicular intersecting elements form a grid having openings of 0.05 a dimension of between about 0.05 and about 0.35 vessel diameters and wherein each set of elements contains elements where the centerlines of the elements are separated by about 0.06 to about 0.60 vessel diameters. The shroud is preferably fabricated in panels that can be secured to the vessel using standoffs.
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"Vortex-Excited Vibrations of Cylinders and Cables and Their Suppression," Ocean Engng., vol. 9, No. 2, pp. 135-157 (1982).
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Allen Donald Wayne
Ayers Ray Rolland
Avila Stephen
Shell Oil Company
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