密閉容器内における1枚回転ディスクの流体関連振動に関する実験的研究

概要

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It is reported that a magnetic disk is vibrationally excited under high speed rotation in a fluid, but few studies have been carried out to clarify the mechanisms causing the unstable vibrations. This paper deals with the characteristics of unstable vibrations induced in a single flexible disk rotating in a confined fluid. Experiments showed the following major results: (1) the disk undergoes an in-phase unstable vibration with a moderate amplitude at the rotation speed of the first instability, and then another out-of-phase unstable vibration with large amplitude at the rotation speed higher than the first one when the rotation speed is increased. (2) There are three hysterisises in the vibration magnitude characteristics with respect to the rotation speed. (3) A large pressure fluctuation appears for the second unstable vibration, which has a phase lag to the vibration displacement of the disk. (4) The disk is half buckled when the vibrational instability occurs.
一般社団法人日本機械学会の論文
1988-04-25