3次元物体の附加質量に及ぼす浅水影響 : K=0とK=∞の場合

概要

論文の詳細を見る
A method of calculation of the shallow water effects on an added mass or moment of inertia of a floating three dimensional body is presented for the cases of the frequency parameter K=0 and K=∞. Numerical examples for a spheroid, prolate spheroids and ellipsoids are also presented. Agreement with Havelock's result for a prolate spheroid in case of K=∞ is satisfactory. The results of the systematic calculations for the ellipsoids with various axis ratio will be useful for the rough estimation of shallow water effects of a ship form, though exact result will be obtained by means of the present method by giving the hull form data. It is pointed out that in solving the problem concerned by the usual integral equation method, the Green function represented by the finite integral can not be applied, though there exist some precedents using this type of the Green function, and that only ones represented by the infinite integral and the infinite series are the correct expressions of the Green function. It is also shown that when the incorrect type of the Green function is used to solve the problem, the results for K=0 show the tendency that the added mass decreases as the water depth becomes shallow in contrast with the fact that the results for K=∞ shows the correct results by cancelling the incorrect part of the representation
独立行政法人海上技術安全研究所の論文
1984-05-31