3. On the Coupling of Hull Vibration and Bottom Vibration of Ships

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概要

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• Higher mode vibration of the ship's hull is analysed, where the main hull is assumed to be a uniform beam (bending deflection is neglected) and the bottom, an elastic plate. Coupling effect of vibratory systems (main hull and bottom) is found to be significant. As the mode becomes higher, the natural frequency obtained from the present theory is considerably lower than that from conventional beam theory. In the region above the natural frequency of the bottom plate the new modes are found, which do not appear from the conventional theory. The longitudinal bending rigidity of the bottom has great effect upon the node-frequency relationship especially in the higher mode. The above-mentioned conclusions partially explain the phenomenon observed in the actual ships.

• 社団法人日本船舶海洋工学会の論文

著者

• Ohnuma Satoru

  Nagasaki Technical Institute Mitsubishi Heavy Industries Ltd.

• YAMAKOSHI Michio

  Kyushu University

関連論文

• 3. On the Coupling of Hull Vibration and Bottom Vibration of Ships

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