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引込現象と結合振動(機械力学,計測,自動制御)

概要

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Oscillations 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 [Pf -Pb=ω] and [3Pf-Pb=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-Pf occur around the speed range of + (1/2)ω resonance with self-excited oscillation of Pf. Furthermore entrainment phenomena and coupling between self-excited oscillation of Pf and oscillation of ω-Pf 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
2003-08-25