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Dynamic behavior of an AMB supported rotor subject to harmonic excitation
Faculty
Science
Year:
2008
Type of Publication:
Article
Pages:
1370-1380
Authors:
Amer, Y. A, Eissa, M. H, Hegazy, U. H
DOI:
10.1016/j.apm.2007.04.005
Journal:
APPLIED MATHEMATICAL MODELLING ELSEVIER SCIENCE INC
Volume:
32
Research Area:
Engineering; Mathematics; Mechanics
ISSN
ISI:000255694600017
Keywords :
active magnetic bearing, multi-excitation forces, primary resonance
Abstract:
This paper presents a study of the non-linear response of a simple rigid disk-rotor, supported by active magnetic bearings (AMB), without gyroscopic effects. The case of primary resonance is examined under multi-excitation forces. The rotating shaft is described by a coupled second order non-linear ordinary differential equations. Approximate solutions are sought applying the method of multiple scales. Numerical simulations are carried out to illustrate the steady-state response and the stability of the solutions for various parameters using the frequency response function method. It is shown that the system parameters have different effects on the non-linear response of the rotor. For steady-state response, however, multiple-valued solutions and jump phenomenon occur. Results are compared to previously published work. (C) 2007 Elsevier Inc. All rights reserved.
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