Influence of Unegual Pedestal Stiffness on the Instability Regions of a Rotating Asymmetric Shaft : 2nd Report, Inclinational Vibrations with Effects of Gyroscopic Action

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The gyroscopic action of a rotor tends to split up the unstable regions which results mainly from the asymmetry of shaft stiffness Δ into several parts by the inequality of bearing stiffness ε. The analysis of this problem is carried out on the assumption that the coefficient of gyroscopic term ip is as small as ε and Δ, or ip is larger than both ε and Δ. The position, width and number of unstable regions are analytically determined. As the value ip increases, the higher side of the split unstable regions becomes larger, but the lower side becomes smaller. The analytical results obtained with the approximation that ip is large in comparison with both ε and Δ show a good coincidence with results obtained by an analog computer.

収録刊行物

  • Bulletin of JSME

    Bulletin of JSME 23 (183), 1514-1521, 1980

    一般社団法人 日本機械学会

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