密閉容器内における二重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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Many studies were carried out on flow characteristics along a rotating hard disk, but few studies have been carried out to clarify the disk's unstable vibration at a highspeed rotation. This paper deals with experimental investigation of vibration characteristics of double flexible disks rotating in a confined fluid. Experiments showed the following results: (1) The disks underwent an unstable vibration for a particular range of rotational speed, and a buckling mode deformation was observed at further high rotational speed. (2) The unstable vibration magnitude exhibited a hysteresis character for the normal boss supporting the double disks to the shaft, but the hysteresis disappeared for the case when the fluid was connected through the holes made in the boss. (3) The dominant frequency of the unstable vibration was found to be the triple harmonics of the rotational speed.
一般社団法人日本機械学会の論文
1989-09-25