Chaotic Vibration and Internal Resonance Phenomena in Rotor Systems. (In the Vicinity of the Major Critical Speed).

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  • 回転軸系におけるカオス振動と内部共振現象  (主危険速度付近)
  • カイテンジクケイ ニ オケル カオス シンドウ ト ナイブ キョウシン ゲンショウ シュ キケン ソクド フキン

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Abstract

In rotor systems, if the gyroscopic moment is small, the forward natural frequency and the backward natural frequency almost satisfy a condition of 1 : (-1)internal resonance. In such systems, the critical speed of a backward harmonic oscillation and that of a supercombination oscillation are near from the major critical speed. This study clarifies dynamical characteristics of nonlinear phenomena, including steady-state oscillations, almost periodic motions, bifurcate phenomena, and chaotic vibrations, due to the internal resonance at the major critical speed.

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