自在継手により駆動される偏平軸の横振動 : 第2報,不安定振動の発生機構

概要

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An asymmetrical shaft driven by a universal joint has a concentrated mass at the middle, and is assumed to have no distributed mass. The generation mechanism of unstable vibrations is explained by considering the dynamical energy of the shaft system, and the relation ship between the natural angular frequencies and the rotating speed from which instability occurs. As for the unstable vibration near the major critical speed, the angular velocity fluctuation of the shaft changes the time rate of growth in the unstable vibration. Each of the rotating speeds, from which three unstable regions expand at about half of the major critical speed, is determined only by the asymmetry of the flat shaft. The average input energy supplied during one revolution of the shaft increases monotonously for the S-type unstable vibration, while it has both positive and negative values for the D-type unstable vibration.
一般社団法人日本機械学会の論文
1985-12-25