Effect of rotational speed fluctuations on the dynamic behaviour of rolling element bearings with radial clearances

Lioulios, AN; Antoniadis, IA

dc.contributor.author	Lioulios, AN	en
dc.contributor.author	Antoniadis, IA	en
dc.date.accessioned	2014-03-01T01:24:10Z
dc.date.available	2014-03-01T01:24:10Z
dc.date.issued	2006	en
dc.identifier.issn	0020-7403	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17188
dc.subject	rolling element bearings	en
dc.subject	clearance	en
dc.subject	speed fluctuations	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	BALL-BEARINGS	en
dc.subject.other	ROTOR	en
dc.subject.other	VIBRATIONS	en
dc.title	Effect of rotational speed fluctuations on the dynamic behaviour of rolling element bearings with radial clearances	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijmecsci.2006.03.006	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijmecsci.2006.03.006	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The behaviour of rolling element bearings is of major importance to the vast majority of rotating machines. Due to the varying assembly compliance and the internal clearance existing in the bearing in most cases, a highly non-linear behaviour of the rotor bearing system appears. Thus, a dynamic model of a horizontal rotor supported on ball bearings with radial internal clearance is considered, taking into account contact forces between the balls and the races, as well as the effect of varying compliance and of the internal radial clearance. However, since rotational speed fluctuations of various levels practically appear in all rotating equipment, their effect is now additionally considered. Their effect is examined in two characteristic rotor bearing cases. The analysis includes all the characteristic states of the dynamic behaviour of the rotor, such as periodic, unstable periodic and chaotic responses, using methods like frequency spectra, phase spaces, higher-order Poincare maps and Lyapunov exponents. All results presented show a dominant stabilization effect of the speed fluctuations with respect to the system behaviour. From the analysis performed, it is concluded that even a minimum fluctuation of the rotor speed may result in major changes of the system dynamics, indicating that speed fluctuations of the rotor are a governing parameter for the dynamic behaviour of the system. (C) 2006 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES	en
dc.identifier.doi	10.1016/j.ijmecsci.2006.03.006	en
dc.identifier.isi	ISI:000238667500001	en
dc.identifier.volume	48	en
dc.identifier.issue	8	en
dc.identifier.spage	809	en
dc.identifier.epage	829	en