Vibration modeling of rotating spindles supported by lubricated bearings

R. Aini, H. Rahnejat, R. Gohar

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

This paper outlines a five degrees of freedom model of a rotating spindle supported by a pair of lubricated angular contact ball bearings. The ball to raceway contacts are simulated by non-linear contact springs, representing the elastic deformation of the mating rolling members and nonlinear spring/dampers, corresponding to the contact elastohydrodynamic oil film thickness. A regression formula is used to model the latter and includes the damping contributed by the squeeze film effect caused by the mutual convergence of bearing rings. Some results of simulation studies with the model are also presented, in both the time and frequency domains. They include the overall system response, when subjected to varying spindle mass or the number of balls in the support bearings. Furthermore, comparisons are made between the simulated response of the dry and lubricated models. The overall contribution to damping of the elastohydrodynamic oil films between the rolling elements and their raceways is shown to be slight.

Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalJournal of Tribology
Volume124
Issue number1
DOIs
Publication statusPublished - Jan 2002
Externally publishedYes

Fingerprint

Bearings (structural)
spindles
elastohydrodynamics
Elastohydrodynamics
vibration
balls
Oils
Angular contact ball bearings
Damping
oils
damping
squeeze films
ball bearings
elastic deformation
dampers
Elastic deformation
Film thickness
regression analysis
film thickness
degrees of freedom

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Vibration modeling of rotating spindles supported by lubricated bearings. / Aini, R.; Rahnejat, H.; Gohar, R.

In: Journal of Tribology, Vol. 124, No. 1, 01.2002, p. 158-165.

Research output: Contribution to journalArticle

Aini, R. ; Rahnejat, H. ; Gohar, R. / Vibration modeling of rotating spindles supported by lubricated bearings. In: Journal of Tribology. 2002 ; Vol. 124, No. 1. pp. 158-165.
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