船の可浸長を求むる一方法
1934 年 1934 巻 54 号 p. 169-190
詳細
1934 年 1934 巻 54 号 p. 169-190
In this paper, the author has tried to introduce an independent practical method for obtaining the “Floodable length” at any point of the length of a ship, as defined in the International Convention for the Safety of Life at Sea, 1929.
The process for finding the “Floodable length” by this method is as following : -
(1) A series of a floodable volume (v) of a ship's hold and the distance from the centre of the volume to the midship is found mathematically, and the floodable volume curve for the whole length of the ship is drawn.
(2) A curve, named the proportional volume curve, representing the volume of the end part of a compartment in the ship corresponding to the floodable volume, where the compartment is bisected by a transverse plane passing-through its centre, is drawn.
(3) Integral curves of the transverse sectional areas of the ship is drawn, the areas being in tegrated from both ends towards amidships.
(4) Using these curves the “Floodable length” at various points of the length of the ship are graphically found, and accordingly the floodable length curve is obtained.
This is an approximate method and the procedure is much simpler than that of the Board of Trade Method, the precision, however, may be said to be not inferior to that of the latter, in general.
