Název: Study of coupling between bending and torsional vibration of cracked rotor system supported by radial active magnetic bearings
Autoři: Ferfecki, Petr
Citace zdrojového dokumentu: Applied and Computational Mechanics. 2007, vol. 1, no. 2, p. 427-436.
Datum vydání: 2007
Nakladatel: University of West Bohemia
Typ dokumentu: article
článek
URI: http://www.kme.zcu.cz/acm/old_acm/full_papers/acm_vol1no2_p051.pdf
http://hdl.handle.net/11025/1965
ISSN: 1802-680X (Print)
2336-1182 (Online)
Klíčová slova: rotorové systémy;magnetická ložiska;torzní vibrace;trhliny
Klíčová slova v dalším jazyce: rotor systems;magnetic bearings;torsional vibration;cracks
Abstrakt: The coupling of bending and torsional vibration due to the presence of transverse fatigue crack in a rotor system supported by radial active magnetic bearings (AMB) is investigated. For this purpose the modified stiffness matrix with six degrees of freedom per node is used and takes into account all the coupling phenomena that exists in a cracked rotor. The partial opening and closing of crack is considered by means of status of stress intensity factor along the crack edge. The equation of motion of rotor system is nonlinear due to response dependent non-linear breathing crack model and nonlinear force coupling introduced by AMB. A response of the rotor system is obtained by direct integration of nonlinear equation of motion. When the torsional harmonic excitation is applied to the rotor system with the crack then the sum and difference of torsional frequency around a bending natural frequency is observed in the lateral vibration spectrum. Influence of different values of crack parameters for two different speeds of rotor is investigated with help of frequency spectra.
Práva: © 2007 University of West Bohemia. All rights reserved.
Vyskytuje se v kolekcích:Volume 1, number 2 (2007)
Volume 1, number 2 (2007)

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