高速コンテナ船の斜波中船体運動について

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Resistance tests in regular oblique waves were carried out with a model of S-175 container ship, which was used in computer exercise of the 15th ITTC, in IHI Seakeeping and Maneuvering Tank. The steering effects on ship motions were investigated in waves of heading angles;χ=-30°& 120°, by towing the model with and without the auto-pilot. The tests were done at zero mean drifting angle to coincide the test conditions with the assumptions of calculations. The mean heading angle was kept up to the given course angle by the auto-pilot steering and a soft yaw resisting spring in a vertical towing rod. The measured amplitudes and phases of the ship motions are compared with the calculations by O.S.M. using the non-linear roll damping coefficients derived from the free rolling tests at a given speed. The followings are conclusive results: 1. The effects of the auto-pilot steering on lateral ship motions are found in long quartering waves. 2. The calculated amplitudes and phases of the vertical ship motions are in good agreement with the measured ones except at χ=90°(beam waves). The measured amplitudes of the vertical ship motions at χ=90°are much greater than the calculated ones. 3. The calculated amplitudes and phases of sway and yaw show a good agreement with the measured ones except in long quartering waves. 4. The calculated amplitudes of roll are in good agreement with the measured ones except in long quartering waves. The calculated phases of roll are, however, much different from the measured ones except at χ=90°.
社団法人日本船舶海洋工学会の論文
1981-06-30

高速コンテナ船の斜波中船体運動について

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