805 複雑構造物のトランスファインピーダンスの計測(GS-10 振動基礎)

概要

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A ship is equipped with many apparatuses which had the reason for the vibration. Particularly, it may give rise to the very large vibrations by coupling effect of main engine and the double deck bottom. As the engine is becoming larger, the natural frequencies are decreasing, and approaching to the usual running condition of the main engine. For the reason, it is important to prediet a vibration for a design step. Then we tried to apply the mechanical impedance method for the vibration prediction. However, when the structure is large scale, the mechanical impedance cannot be measured by the method. Therefore. we suggested a new method to measure the mechanical impedance. This paper showed the exprimental results using a engine and a simple beam to show the effectiveness of this method.
2000-03-16