Online Archive of University of Virginia Scholarship
Stability of rotors supported by tilting pad journal bearings162 views
Author
Cloud, Charles Hunter, Mechanical and Aerospace Engineering, University of Virginia
Advisors
Barrett, Lloyd, School of Engineering and Applied Science, University of Virginia
Eric A., Maslen, School of Engineering and Applied Science, University of Virginia
Paul E., Allaire, School of Engineering and Applied Science, University of Virginia
Edgar J., Gunter, School of Engineering and Applied Science
John A., Kocur, School of Engineering and Applied Science, University of Virginia
Abstract
Rotor instability, a self-excited vibration phenomenon, remains a serious and costly problem with turbomachinery. Avoidance is attempted through rotordynamic modeling as well as testing. However, large modeling uncertainties exist, and common shop testing methods provide no correlation with predictions. For tilting pad journal bearings, the central uncertainty lies in whether or not they should be represented with frequency dependent dynamics. The two existing representations, one being a simplification of the other, can produce very different stability predictions. Such predicted differences suggest that stability testing should be an effective platform for distinguishing between the two representations. A method for stability measurement of rotor systems is developed in this investigation.
Degree
PHD (Doctor of Philosophy)
Keywords
turbomachinery; rotordynamics
Language
English
Rights
All rights reserved (no additional license for public reuse)
Cloud, Charles Hunter. Stability of rotors supported by tilting pad journal bearings. University of Virginia, Mechanical and Aerospace Engineering, PHD (Doctor of Philosophy), 2007-01-01, https://doi.org/10.18130/zwe7-4v04.
