Bifurcation analysis of a flexible rotor supported by two fluid-film journal bearings
Document Type
Article
Publication Date
7-1-2006
Abstract
The effects of rotor stiffness on the bifurcation regions of a flexible rotor supported by two identical fluid-film journal bearings are presented. It is shown that the rotor stiffness has a pronounced influence on the bifurcation characteristics at the instability threshold speed. For short bearings, two bifurcation regions exist if the dimensionless rotor stiffness K̄ ≥ 4.3. On the other hand, three bifurcation regions exist if the dimensionless rotor stiffness K̄ < 4.3. Information is presented that allows one to easily predict both the instability threshold speed and its bifurcation type of a rotor-bearing system with any specific set of operating parameters. The results presented have been verified by laboratory experiments as well as several published results in the open literature. Several examples are presented to illustrate the application of the results for design purposes. Copyright © 2006 by ASME.
Publication Source (Journal or Book title)
Journal of Tribology
First Page
594
Last Page
603
Recommended Citation
Wang, J., & Khonsari, M. (2006). Bifurcation analysis of a flexible rotor supported by two fluid-film journal bearings. Journal of Tribology, 128 (3), 594-603. https://doi.org/10.1115/1.2197842