船体に働く横揺れ減衰力について(第1報) : 自由横揺れ試験結果

概要

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Damping of rolling motion was measured on various ship types, i. e. container ships, cargo liners, car ferry, roll-on/roll-off ship, neuclear ship, mathematical ship form, and fishing boat. The models of these ships were towed by the carriage which constrained the model to move freely in rolling, pitching and heaving motions while the other modes of motions were restrained. The rolling axis were coincided with the longitudinal axis through the center of gravity of the model. From the record of the decrement of the rolling amplitudes after the release of the initial heeling the linear and the non-linear coefficients of roll damping were determined. The coefficients of roll damping are represented on the diagrams of this paper, and the effects of forward velocity are mainly shown. The effects of bilge keels, rolling period, loading condition are also shown according to the model test. Damping coefficients obtained from the free rolling tests are compared with those measured by the forced rolling experiments on a container ship model.
独立行政法人海上技術安全研究所の論文
1979-09-30