7. On the Unusual Phenomena in Manoeuvrability of Ships

概要

論文の詳細を見る
It has been passed more than ten years since so-called unusual phenomena in manoeuvrability were first reported by Nomoto. At the early stage of research, the phenomena were regarded as the unusual scale effect, because it appeared only in model ships. According to the tendency of growing in fullness of ships, however, these phenomena have been observed on real ships. For these several years the authors have treated such phenomena appeared on either model ships or real ships frequently in free-running tests, captive model tests or full-scale trials. Some of these results were already published. Through the detailed examination of these experiences, the comprehensive explanation of the phenomena is made as the main purpose in the present paper. It is known from the captive model tests that in model ships with the phenomena the measured hydrodynamic force contains two kinds of forces: one is the ordinary force proportional to ship motions and the other is the unusual force which appears only in ships with the phenomena. This unusual force is found to originate from the flow separation at one side of the stern by the flow observation. The unusual force is roughly classified into two types; binary type and breakline type (see Fig. 5). Another factor closely related to the phenomena is directional stability of ships. Almost all the unusual phenomena ever found are shown to be well explained by the combinations of directional stability with two types of unusual force.
社団法人日本船舶海洋工学会の論文

7. On the Unusual Phenomena in Manoeuvrability of Ships

スポンサーリンク

概要

著者

関連論文

スポンサーリンク