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International Journal of Rotating Machinery
Volume 10, Issue 3, Pages 155-162
http://dx.doi.org/10.1155/S1023621X04000168

Unbalance Responses of Rotor/Stator Systems with Nonlinear Bearings by the Time Finite Element Method

1Département de Mécanique des Solides, LTDS, Ecole Centrale de Lyon, Ecully Cedex, France
2Département de Mécanique des Solides, LTDS, Ecole Centrale de Lyon, BP 163, Ecully Cedex, 69 131, France

Copyright © 2004 Hindawi Publishing Corporation. 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.

Abstract

Since the early 1970s, major works in rotordynamics were oriented toward the calculation of critical speeds and unbalance responses. The current trend is to take into account many kinds of non-linearities in order to obtain more realistic predictions. The use of algorithms based on nonlinear methods is therefore needed. This article first describes the time finite element method. The method is then applied to nonlinear rotor/stator systems where bearings present a radial clearance.