ダッシュポット係留索の実船への適用可能性に関する基礎的研究

概要

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In harbors influenced by waves, ship's cargo handlings are often interrupted by severe ship motions. The interruption threshold of cargo handling is, for example, 2 degrees of roll in amplitude, or 1 meter of surge or sway in amplitude. Furthermore, as the ship motions become severer, mooring lines of ships are broken and it becomes impossible to moor the ships at berth, and such a threshold condition of mooring is 5 meters of surge or sway in amplitude. In this paper, a new mooring system composed of dash-pots in mooring lines is proposed in order to decrease such ship motions. After some considerations, following results are obtained. Ship motions which are close to the threshold conditions of cargo handling can be decreased by using the dash-pots so that the damping force of the dash-pot is smaller than the strength of mooring lines and bitts. However, when the ship motions become the same order of threshold conditions of mooring, the damping forces exceed the strength of the mooring facilities. So it is necessary to strengthen the mooring facilities for the use of dash-pots in the storm.
社団法人日本航海学会の論文
1985-09-20