733 クリアランス内で衝突を伴うロータの非線形強制振動と自励振動 : 1/2 次分数調波共振付近の振動

概要

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Oscillation around 1/2 order subharmonic resonance are investigated in a rotor system with a radial clearance between the bearing and the casing by numerical simulations and experiments. The following phenomena due to impact in the bearing are found : (1) Combination oscillations of [p_f-p_b=ω] and [3p_f-p_b=2ω] occur in lower speed range of +(1/2)ω resonance. (2) Entrainment phenomena occur in the speed range of +(1/2)ω resonance. (3) Oscillations of ω-p_f occur around the speed range of +(1/2)ω resonance with self-excited oscillation of p_f. Furthermore entrainment phenomena and coupling between self-excited oscillation of p_f and oscillation of ω-p_f are explained theoretically by a similar self-sxcited and forced oscillation model of nonlinear van der Pol's equation.
社団法人日本機械学会の論文
2002-09-13