防撓板の接水振動における付加水質量推定法

概要

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The proper design estimate of stiffened plates is very important because they are one of the most basic structural elements of a ship hull. Since stiffened plates such as walls in a tank are immersed in water or other kinds of liquid, their natural frequencies tend to decrease and often become resonant with the exciting force due to a propeller or a main engine. In many cases, the scantlings of stiffened plates are increased to avoid resonant vibrations. In the previous paper, we developed a computer program for the vibration analysis of rectangular stiffened plates in water, and we obtained a good agreement between calculations and experiments. According to those results and adding some other calculations, we are discussing here a simple method to estimate the virtual mass of immersed stiffened plates. We performed a vibration analysis of aft-peak tank floor using NASTRAN as an example. The result showed a possibility of large reduction in natural frequency for the floor vibrating in water.
社団法人日本船舶海洋工学会の論文
1980-06-30