船体縦・上下振動と軸系振動との連成について(その1)

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As the investigations on the effects of local vibration on the ship's hull vibration, we have Dr. Y. Watanabe's paper on the causes of the stern vibration of a ship, Dr. I. Suetsugu's paper on the classification of the vibration at the stern of single screw vessels, one of the auther's paper which deals with the coupling of bottom vibration and hull vibration of ships, and K. Ohtaka et al's paper on the vertical-longitudinal vibration coupled with the vibration of shaft system and with fore-and-aft vibration of superstructure. The problem of the coupling of verticallongitudinal vibration and vibration of shaft system seems to be clarified fairly well by the paper by K. Ohtaka et al.. This paper, attempting to make clearer the qualities of this problem, describes qualitatively the effects of the position of thrust block, the effects of the torsional rigidity of double bottom, and the aspects of resonance curves in the cases where the thrust variation works on the shaft system and the vertical surface force works on the stern. To make simple the analysis, in this paper, the ship's hull is assumed to be the uniform shear beam, neglecting the effect of bending deformation. As a result of this study, it has been made clear that the resonance does not occur at the natural frequency which corresponds to the even-node vertical vibration when the thrust variation works on the shaft system, and that the resonance occurrs every natural frequency when the vertical surface force works on the stern.
社団法人日本船舶海洋工学会の論文
1971-07-31

船体縦・上下振動と軸系振動との連成について(その1)

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