Anti-rolling structure for box-type floating body
AssigneeIshikawajima-Harima Jukogyo Kabushiki Kaisha
InventorsToru Takahashi, Yuji Awashima, Seiya Yamashita
Life of this patent
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Abstract
A floating body 1, which is substantially rectangular when seen from above, is provided with at least a protrusion 3 on at least either of sides in a transverse direction 5 of the floating body 1 at a level lower than a waterline 4.
Claims9
An anti-rolling structure for a box-type floating body comprising said floating body which is substantially rectangular when seen from above and at least a protrusion on at least either of transverse sides of the floating body, said protrusion extending longitudinally of the floating body at a level lower than a waterline so as to adjust a moment lever l(K) to a value at least close to that of distance OG from an origin O lying at the waterline to center G of gravity,
- the moment lever l(K) being given by an equation
- l(K)=k2l20−(1+k2)lwo
- where k2 define an added mass coefficient of sway motion,
- l20 defines a hydrodynamic force moment lever, and
- lwo defines a wave exciting moment lever about the origin O.
Dependencies are inferred from the claim text.