非線形ばね特性と内部減衰をもつ回転軸系の強制振動 : 1/3次分数調波振動と引込現象

概要

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An elastic rotating shaft supported by ball bearings may have nonlinear spring characteristics due to clearance and internal daming due to friction between the shaft and the bearings. In such a system, self-excited oscillations appear in the postcritical region and nonlinear forced oscillations appear at various resonance points In this paper, a phenomenon in the neighborhood of the critical speed of the subharmonic oscillation of order 1/3 of the forward whirling mode is discussed. It is clarified that, similar to the case of the subharmonic oscillation of order 1/2 of the forward whirling mode, an entrainment phenomenon appears due to the interplay between self-excited oscillation and forced oscillation.
1996-02-25