二重底振動の付加慣性質量が船体固有振動数に及ぼす影響について

概要

論文の詳細を見る
The two-dimensional calculation of the rate of increase of the virtual added inertia of water induced by a bottom vibration in the vertical vibration of a midship section of Lewis' form is considered first. A three-dimensional approach is attempted there by the use of the two-dimensional theory, where the modes of vibrations of hull and bottom centre line are assumed as sinusoidal. On the other hand, considering that the relation between the increase of the amplitude of the bottom panel and the natural frequency of the hull vibration is that of the coupled vibration system, the author verified it from the results of vibration test of the bottom panel on board a bulk carriers. Lastly, the author presents a new method of correction, which is applicable to the natural frequency of the hull vibration coupled with bottom vibration, in which are included the natural frequency of the bottom panel and other theoretical factors. Some numerical examples are illustrated.
社団法人日本船舶海洋工学会の論文