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Bifurcations in the response of a rigid rotor supported by load sharing between magnetic and auxiliary bearings

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dc.citedby12
dc.contributor.authorInayat-Hussain J.I.en_US
dc.contributor.authorid6602271377en_US
dc.date.accessioned2023-12-29T07:47:19Z
dc.date.available2023-12-29T07:47:19Z
dc.date.issued2011
dc.description.abstractAuxiliary bearings are utilized in practical installations of magnetically suspended rotating machines with the main functions to provide support to the rotating machines during their non-operational period, and to protect the magnetic bearings and the rotating assembly from being damaged due to power loss during operation. The relatively small clearances of these bearings, which are typically half of that of the magnetic bearings, may at time cause contact between the rotor and these bearings to occur even during normal operation of the rotating machines. The work presented herein examines the bifurcations in the response of a rigid rotor supported by load sharing between magnetic and auxiliary bearings, which occurs during contact between the rotor and the auxiliary bearings. Numerical results revealed the occurrence of period-doubling bifurcation resulting in vibrations of period-2, -4, -8, -16 and -32, as well as quasi-periodic and chaotic vibrations. The results further showed that for a relatively small rotor imbalance magnitude, which is within the prescribed level of certain classes of practical rotating machinery, such nonlinear dynamical phenomena would not have been discovered had the auxiliary bearings forces been omitted in the model of the rotor-bearing system. As these bearings are essential elements in practical installations of magnetically supported rotating machines, failure to include them in the rotor-bearing model may result in incorrect prediction of the rotor's vibration response. � 2010 Springer Science+Business Media B.V.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1007/s11012-010-9395-8
dc.identifier.epage1351
dc.identifier.issue6
dc.identifier.scopus2-s2.0-81955164256
dc.identifier.spage1341
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-81955164256&doi=10.1007%2fs11012-010-9395-8&partnerID=40&md5=2eac5dd68513468eb8aa3296a431c8df
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30388
dc.identifier.volume46
dc.pagecount10
dc.sourceScopus
dc.sourcetitleMeccanica
dc.subjectActive magnetic bearing
dc.subjectAuxiliary bearing
dc.subjectBifurcation
dc.subjectNonlinear
dc.subjectRotordynamics
dc.subjectBifurcation (mathematics)
dc.subjectMagnetic bearings
dc.subjectMagnetism
dc.subjectRotating machinery
dc.subjectRotation
dc.subjectActive Magnetic Bearing
dc.subjectAuxiliary bearings
dc.subjectChaotic vibration
dc.subjectDynamical phenomena
dc.subjectEssential elements
dc.subjectLoad sharing
dc.subjectNonlinear
dc.subjectNormal operations
dc.subjectNumerical results
dc.subjectPeriod doubling bifurcation
dc.subjectPower-losses
dc.subjectQuasi-periodic
dc.subjectRotating machine
dc.subjectRotor-bearing
dc.subjectRotor-bearing system
dc.subjectRotor-dynamics
dc.subjectVibration response
dc.subjectRigid rotors
dc.titleBifurcations in the response of a rigid rotor supported by load sharing between magnetic and auxiliary bearingsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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