@article{oai:nagoya.repo.nii.ac.jp:00007363, author = {稲垣, 瑞穂 and INAGAKI, Mizuho and 石田, 幸男 and ISHIDA, Yukio and 早川, 誠 and HAYAKAWA, Makoto and 安田, 聡 and YASUDA, Satoshi}, issue = {684}, journal = {日本機械学會論文集 C編}, month = {Aug}, note = {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 [p_fーp_b=ω] and [3p_fーp_b=2ω] occur in lower speed range of + (1/2)ω resonance. (2) Entertainment phenomena occur in the speed range of +(1/2)ω resonance. (3) Oscillations of ωー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-excited and forced oscillation model of nonlinear van der Pol's equation.}, pages = {1960--1967}, title = {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)}, volume = {69}, year = {2003} }