回転円筒立て形軸系の半浸水時における不安定振動の実験的研究

概要

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When a vertical cylindrical rotor is partially immersed in water and driven at supercritical speeds, the rotor-shaft system is suspected of undergoing an unstable vibration. This paper uses experiments to show the existence of an unstable whirling vibration for a vertical cylindrical rotor partially immersed in water, and its characteristics with respect to the depth of rotor immersion in water and the rotation speed. The unstable vibration was found to occur at supercritical speed for a limited range of water immersion, and its dominant frequency coincided with the natural one of the rotor-shaft system. The visualization of water surface wave around the rotating cylinder revealed that a very peculiar wave traveling backward to the cylinder rotation seems to be a major cause for the unstable vibration.
一般社団法人日本機械学会の論文
1989-03-25