Working out the specification of an Ocean 3 Floating Monopile Donut Fender is an important process. All aspects must be considered with a special emphasis on the design, involving simultanously consideration of both the pile and Donut Fender parameters. This as well taking into account features which should be checked to ensure an adequate design is developped : in view to ensure there is no contact between the Vessel and the pile at maximum impact loads, and to ensure a safe behaviour of the Donut Fender when in contact with the Ship during high winds or strong tidal surges.
Should Steel pile is also embedded on upper part, then Donut Fender will have to ensure the whole Berthing Energy in that case.
Ocean 3s' range of "Specific Fenders" are manufactured with the same high quality raw materials as its other foam filled products such Dock Fenders and Workboat fendering Systems :
The below curve shows the Energy Absorption of the considered Ocean 3 Donut Fender under a different % of Compression. Only one side of the Fender is working during compression and not its entire diameter. Performances are usually given up to a compression of 60 % however higher compression is occasionally permissible during short periods of time when accidents occur.
A deflection at and higher than 75 % if applied over hours will reduce the ability of the foam to recover its original shape. It will however continue to insure its securing function. Please note that for such high compressions there is a risk of damaging the internal steel parts of the Donut Fender.
The "Reaction Force" Curve shows the forces generated both on the Vessel hulls and the Steel Monopile during compression of the Donut Fender :
Fender performances are given at 60 % of compression; values may vary by +or- 10 % due to variations in speed of compression, operating temperatures, materials and dimensional tolerances. They are calculated by Ocean 3s' Design Department according to the specification of the Vessel and its operating conditions.
