精鉱運搬船に起る荷の移動に関する研究

概要

論文の詳細を見る
The mineral concentrate cargo which has high moisture contents may shift with the following two phenomena: (1) The saturated concentrate liquefies due to cyclic loading and, finally flows to the inclined side. (2) The water, which exudes on the surface of cargo due to consolidation, gradually transports the concentrate to one side. In this paper, the dangerous aspect of the liquefaction of cargoes is shown by the experimental simulation with a model ship. It can he seen that a large amount of saturated concentrate shifts suddenly and results in a quick increase of the heeling angle. An analytical procedure is proposed to estimate the amount of liquefied concentrate. The result of calculation shows good agreement with the experimental data. The advantage of the use of shifting board is also examined with the proposed analytical method and model tests. It is shown that the shifting board with appropriate dimension and rigidity prevents considerable amount of mass of concentrate from liquefaction.
社団法人日本航海学会の論文
1984-01-25