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pontoon overturning/stability

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fastphantom

fastphantom

Mechanical
Sep 27, 2001
24
Can anyone help with a calc for overturning or stability of a floating vessel (like a pontoon or barge)?

Thanks
 
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Sure, what are the particulars?

lenght, beam, draft, displacement, Center of gravity, second moment of the water plane area (transverse), center of buoyancy. This information will give initial stability. Stability at extreem angles(>10 deg) is different.

GM = KM - KB = KB + BM - KG

GM positive is stable, where KG is distance from keel to center of gravity, KB keel to center of buoyancy, and BM is

BM = It / Displacement

from this you can figure out your righting moment

M = GZ * displacement

where GZ = GM sin(tha)

cheers....
lucas
 
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