機關の位置と船體撓振動との關係に就て

概要

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The naval architects have long been convinced that the position of engine should be located at the node of the free vibration of ship to make minimum the flexural vibration which is excited by the unbalanced forces of that engine. On the contrary, Dr, Sezawa proposed few years ago a new theory as the result of theoretical consideration that the position of engine should be located at the loop instead of the node of the free vibration of ship when the engine has the unbalanced forces and is located at the node when the unbalanced couple exists in the engine. The authors have treated the problem theoretically to make clear which position should be selected in the design so as to reduce the flexural vibration as possible. According to our investigation, we find that there are some incorrect assumptions in Dr. Sezawa's theory, and from the characteristics of the resonance curves which we obtained, we can conclude that the engine should be located at the node of the ship's vibration according to the old and prevailing theory.
社団法人日本船舶海洋工学会の論文
1947-10-25