巡視船の横揺減滅係数について

抄録

In this paper the damping coefficient of roll for patrol boats engaged in Major Coasting Areas (generally, represented in N) has been investigated, and a method to obtain the damping coefficient of ship for any condition was presented, analysing results of tank experiments of nine models.
The mothod is ; first, a standard N for standard condition is obtained from a chart, (the N function of bilge keel size and C_??_ while d/B, KG/d₀ and K/B constant), then corrections for d/B, KG/d₀, K/B are done by properly prepared charts.
where C_??_= maximum sectional area coefficient of the ship d=draft of the ship
B=beam of the ship
KG=vertical position of center of gravity of the ship above base line d₀=standard draft
K=radius of gyration of the ship