コンテナ船穂高丸による北太平洋実船実験についてコンテナ船穂高丸による北太平洋実船実験について

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Results of an actual ship test on the container ship "Hotaka-maru" owned by Showa Shipping Co. Ltd. and N.Y.K. Line Ltd. on the North Pacific Ocean are reported. The test was planned according to the five years' plan on highspeed container ships of the Ship Research Institute, and was supported by the Japan Container Association. The main objects of the tests were to collect datas about sea-margin, seakeeping quality, and behaviour of on-deck container. For these objects, a special test container which had many pickups to measure stress, deformation and acceleration was loaded on the deck. The tests were carried out on her 23rd and 24th voyages in 1972. Torque, thrust and revolution of the propeller shaft, angle of rolling and pitching, accelerations by ship motion, lashing tension, and stress and deformations of the container were measured. After analyses of the data following conclusions are obtained. 1. Sea conditions had much influence on the average sea-margin. Supposing that duration of very rough sea which occupied about 15% of a total navigation time were excepted, the average sea-margin might be decreased from 45.5% to 18.5% in a voyage. 2. In case of very rough sea that the wind force exceeds eight by Beaufort scale, the ship speed has been reduced to avoid heavy pitching motion, which angle has exceeded about 10 degrees in double amplitude, and the course of ship has been changed to avoid heavy rolling motion, which angle has exceeded about 30 degrees in double amplitude. 3. From the relations between the tensions of container lashing members and the accelerations of the test container, the expectations of the lashing members' tensions can be estimated from the distributions of the accelerations on deck. 4. The tensions of diagonal lashing members were larger than those of vertical members, and the stresses of the container caused by racking were negligibly small compared to the stresses on a proof-test of the container.
独立行政法人海上技術安全研究所の論文
1975-10-31

コンテナ船穂高丸による北太平洋実船実験についてコンテナ船穂高丸による北太平洋実船実験について

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