II - GENERAL DATA

A) SPECIFICATION

OCEAN 3 mooring buoys are typically made from a core of Polyethylene (PE) foam which will recover its shape after compression, 100% closed cell of various densities depending on usage. Such foam will guaranty no water absorption in case of damage. It allows a compression of up to 60% of its original volume for short periods of time, to regain its shape, meaning they allow for energy absorption, such as a fender.    

The choice of the foam density relies on setting up the best parameters between weight and its ability to compress (as the higher the density the less the buoyancy will be).

A conical shape on the bottom part will allow it to be more stable in the water.

 

B) CALCULATION OF THE TENSION LINE MOORING FORCES

 

A calculation needs to be established as to working out the total force coming from the mooring line.

CALCUL DES TENSIONS D'AMARRE

 

Calculation of the angle of the buoy with the mooring line.

CALCULS DES TENSIONS 02        CALCULS DES TENSIONS 03

 

Calculation of the moorings with multiple anchor points.

AMARRAGE MULTIPLES Domaine d'utilisation Angulaire

 

C) DRAFT AND FREEBOARD CALCULATION

TA - TE 

The buoy with the mooring line weight is represented above. The draft / free board will change depending on the weight of the mooring line.

D) DEAD WEIGHT / SINKER

Corps Mort 01 Corps Mort 02

E) STABILITY CALCULATION

Having worked out the centre of gravity, we are able to represent the stability of the buoy when in full charge or without any moorings. All those figures have been calculated in 3d views.

Stability simulation in full charge from 10° to 90° angle

CALCULS DE STABILITÉ CALCULS DE STABILITÉ 01

Stability curves

Stabilité 03Stabilité 04