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Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings

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dc.citedby31
dc.contributor.authorInayat-Hussain J.I.en_US
dc.contributor.authorid6602271377en_US
dc.date.accessioned2023-12-29T07:56:03Z
dc.date.available2023-12-29T07:56:03Z
dc.date.issued2009
dc.description.abstractThis work reports on a numerical investigation on the bifurcations of a flexible rotor response in active magnetic bearings taking into account the nonlinearity due to the geometric coupling of the magnetic actuators as well as that arising from the actuator forces that are nonlinear function of the coil current and the air gap. For the values of design and operating parameters of the rotor-bearing system investigated in this work, numerical results showed that the response of the rotor was always synchronous when the values of the geometric coupling parameter ? were small. For relatively larger values of ?, however, the response of the rotor displayed a rich variety of nonlinear dynamical phenomena including sub-synchronous vibrations of periods-2, -3, -6, -9, and -17, quasi-periodicity and chaos. Numerical results further revealed the co-existence of multiple attractors within certain ranges of the speed parameter ?. In practical rotating machinery supported by active magnetic bearings, the possibility of synchronous rotor response to become non-synchronous or even chaotic cannot be ignored as preloads, fluid forces or other external excitation forces may cause the rotor's initial conditions to move from one basin of attraction to another. Non-synchronous and chaotic vibrations should be avoided as they induce fluctuating stresses that may lead to premature failure of the machinery's main components. � 2008 Elsevier Ltd. All rights reserved.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1016/j.chaos.2008.09.041
dc.identifier.epage2671
dc.identifier.issue5
dc.identifier.scopus2-s2.0-67649308738
dc.identifier.spage2664
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-67649308738&doi=10.1016%2fj.chaos.2008.09.041&partnerID=40&md5=93a6dc9a8cda38738894342f96786b5a
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30929
dc.identifier.volume41
dc.pagecount7
dc.publisherElsevier Ltden_US
dc.sourceScopus
dc.sourcetitleChaos, Solitons and Fractals
dc.subjectActuators
dc.subjectBifurcation (mathematics)
dc.subjectGeometry
dc.subjectMagnetic bearings
dc.subjectMagnetism
dc.subjectActive Magnetic Bearing
dc.subjectBasin of attraction
dc.subjectCoupling parameters
dc.subjectExternal excitation
dc.subjectMultiple attractors
dc.subjectNumerical investigations
dc.subjectOperating parameters
dc.subjectRotor-bearing system
dc.subjectMagnetic actuators
dc.titleGeometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearingsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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