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

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

This 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...

Full description

Saved in:

Bibliographic Details
Main Author:	Inayat-Hussain J.I.
Other Authors:	6602271377
Format:	Article
Published:	Elsevier Ltd 2023
Subjects:	Actuators Bifurcation (mathematics) Geometry Magnetic bearings Magnetism Active Magnetic Bearing Basin of attraction Coupling parameters External excitation Multiple attractors Numerical investigations Operating parameters Rotor-bearing system Magnetic actuators
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.uniten.dspace-30929
record_format	dspace
spelling	my.uniten.dspace-309292023-12-29T15:56:03Z Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings Inayat-Hussain J.I. 6602271377 Actuators Bifurcation (mathematics) Geometry Magnetic bearings Magnetism Active Magnetic Bearing Basin of attraction Coupling parameters External excitation Multiple attractors Numerical investigations Operating parameters Rotor-bearing system Magnetic actuators This 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. Final 2023-12-29T07:56:03Z 2023-12-29T07:56:03Z 2009 Article 10.1016/j.chaos.2008.09.041 2-s2.0-67649308738 https://www.scopus.com/inward/record.uri?eid=2-s2.0-67649308738&doi=10.1016%2fj.chaos.2008.09.041&partnerID=40&md5=93a6dc9a8cda38738894342f96786b5a https://irepository.uniten.edu.my/handle/123456789/30929 41 5 2664 2671 Elsevier Ltd Scopus
institution	Universiti Tenaga Nasional
building	UNITEN Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Tenaga Nasional
content_source	UNITEN Institutional Repository
url_provider	http://dspace.uniten.edu.my/
topic	Actuators Bifurcation (mathematics) Geometry Magnetic bearings Magnetism Active Magnetic Bearing Basin of attraction Coupling parameters External excitation Multiple attractors Numerical investigations Operating parameters Rotor-bearing system Magnetic actuators
spellingShingle	Actuators Bifurcation (mathematics) Geometry Magnetic bearings Magnetism Active Magnetic Bearing Basin of attraction Coupling parameters External excitation Multiple attractors Numerical investigations Operating parameters Rotor-bearing system Magnetic actuators Inayat-Hussain J.I. Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
description	This 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.
author2	6602271377
author_facet	6602271377 Inayat-Hussain J.I.
format	Article
author	Inayat-Hussain J.I.
author_sort	Inayat-Hussain J.I.
title	Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
title_short	Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
title_full	Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
title_fullStr	Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
title_full_unstemmed	Geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
title_sort	geometric coupling effects on the bifurcations of a flexible rotor response in active magnetic bearings
publisher	Elsevier Ltd
publishDate	2023
_version_	1806426490120699904
score	13.211869

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

Similar Items