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International Journal of Rotating Machinery
Volume 2010, Article ID 273716, 17 pages
Review Article

Model Reduction Methods for Rotor Dynamic Analysis: A Survey and Review

1Department of Mechanical and Aerospace Engineering at University of Virginia, 122 Engineer's Way, P.O. Box 400746, Charlottesville, VA 22904-4746, USA
2Department of Systems and Information, University of Virginia, 151 Engineer's Way, P.O. Box 400747, Charlottesville, VA 22904-4747, USA

Received 30 September 2010; Accepted 21 December 2010

Academic Editor: Jerzy Sawicki

Copyright © 2010 Matthew B. Wagner et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The focus of this literature survey and review is model reduction methods and their application to rotor dynamic systems. Rotor dynamic systems require careful consideration in their dynamic models as they include unsymmetric stiffness, localized nonproportional damping, and frequency-dependent gyroscopic effects. The literature reviewed originates from both controls and mechanical systems analysis and has been previously applied to rotor systems. This survey discusses the previous literature reviews on model reduction, reduction methods applied to rotor systems, the current state of these reduction methods in rotor dynamics, and the ability of the literature to reduce the complexities of large order rotor dynamic systems but allow accurate solutions.