一軸高速コンテナー船の縦波中の耐航性能に関する研究

概要

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Model experiments and theoretical calculations were carried out to obtain data about the seakeeping qualities of high speed single screw container ships in head waves, and to make clear how much extent can a theory predict that. The models selected for the experiments were wooden models of length 4m with block coefficient C_B≒0.56 and length beam ratio L/B≒6.8, one with small bulbous bow and the other with normal bow. The effect of length beam ratio on the seakeeping qualities were also investigated. From the investigation, the following conclusions were obtained. 1) The linear theory based on the Strip Method can predict seakeeping qualities with sufficient accuracy for practical use, except a few items such as vertical acceleration at stern, and resistance increment in irregular waves. 2) When we compare ship motions of two ships having similar body plan, similar displacement, same speed and different L/B, the heaving and pitching amplitude and the vertical acceleration of the large L/B ship are smaller than that of the small L/B ship. 3) Impact pressure on bottom and probability of deck wetness of the normal bow ship are smaller than that of the bulbous bow ship, but there are little differences in ship motions and resistance increment between both types of ships. Investigation on the impact wave load is hoped to be continued to make clearer the seakeeping qualities of ships.
社団法人日本船舶海洋工学会の論文
1971-03-31