波の上の横動搖の性質に就て

概要

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The present knowledge on the rolling of a ship on waves is only qualitative, and the results of theoretical calculations can not be compared with experiments. In this paper, firstly the solution of the forced rolling on permanent waves with the resistance composed of the terms, proportional to the angular velocity and its square, is obtained, and by comparing the theoretical results with tank experiments, the validity of the assumptions usually adopted is investigated. If we assume the resistance to be the function of the absolute angular velocity and compare the theoretical values with the experimental ones, the resistance on waves increases a very little from that for free rolling, and the effective wave slope coefficient, which is theoretically deduced by the statical conditions, should be reduced by quite a large amount. If we take the resistance to be the function of the relative angular velocity, the increases of resistance on waves are rather irregular, the amount being generally larger than in the previous case, but the reduction of the effective wave slope coefficient is similar as in the previous case. Lastly, a new expression for the synchronous rolling is obtained, and compared with the experiment.
社団法人日本船舶海洋工学会の論文
1935-06-25