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MDOF vibration rotary system parameters change

Appears,[link widoczny dla zalogowanych], back substitution to (24) is also known motion of the system unstable. Therefore, in this example, for a given E, when n = 0.5571152 and 1.36736, the. Have complex roots. That correspond to these non-dimensional angular motion of the system is unstable. To this end the dimensionless angular velocity in the vicinity of the search, until the emergence of positive real roots, you can obtain the domain-wide instability. The article only (16) or (21) can easily estimate the domain-wide instability, apparently computing workloads is unparalleled. ) 69 ● 0lI ~ Mian 0En a touch OnE an eleven-kun +. a-0-0I a 001,132 Vibration Engineering 5 Juan Liu,[link widoczny dla zalogowanych], conclusions derived from the preparation of the theorem unstable region, in addition to the = + may also occur near the combination resonance (Combinationresonances). and when (1) of the {ij,[link widoczny dla zalogowanych], {} and {j to {j, {j,[link widoczny dla zalogowanych], and {qj, then at = a combinations may occur near the resonance. The author has used this method to analyze a multi-degree of freedom rotor torque in the cycle of motivation, consider the coupling of bending and torsion, its whirl of parametric vibration For a horizontal axis rotor with asymmetric stiffness,[link widoczny dla zalogowanych], the authors have successfully obtained the same way and the unstable whirling frequency domain when the resonance is equal to 2n. Time without considering the rotation effect, this phenomenon is the so-called deputy critical phenomena. Although this article only the first order gives the new solution, but further second-order asymptotic solution can be obtained. Reference to cultural and educational IHsuCS. Ontheparametricexcitationofadynamicsystelnhavingmultipledegreeso / freedom. J. Ap-p1. Mech. . 1963I30 (3) 367-3722Dugund ~ J, WendellJH. s. meanalysismethodsforrotatingsystemswithperiodiccodfieients. AI from J. . 1983I21 (6); 890-8973 Chung Yat Ngok, He Yanzong, Wang Zheng. Li Fang choice. Rotor dynamics. Please Chinese Imperial College Press. 19874 He Yanzong. Natures harmonic rotor torque by the garland when Li Jie Hui move. Vibration Engineering. 1991f4f3) I - 05YamamotoT. Ontheunstablevibrationsofashahcartyinganunsymmetricalrotor. J. App1. Mech. . 1964'31 (3) ± 51S a 522OntheParametricExcitationofaGyroscopicSystemHavingMultidegreesofFreedomHeYanzong (Dept · ofEingineeringMechanics, TsinghLlaUniversityBdj ~ ng.100084) AbstractInthispaper, acommonproeedui'eforanalyzingthestabilityofagyroscopicsystemwithperiodicco-efflc ~ ntsispresented. ThefirstapproximationisobtainedbymeansofatheoremgiveIIbytheauthorandthemethodmukiplescales. Thestabilityforthecaseswhentheparametricexdtatlonfrequencyisnear-lyequaltO2ol-+ qarediscussed. andtheinstabilityregionsofthesecasesaredew-/red. keywords: rotordynamics, parametricexcitationtstabilityanalysis, gyroscopicsystem

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