International Journal of Rotating Machinery

International Journal of Rotating Machinery / 2000 / Article

Open Access

Volume 6 |Article ID 496143 | https://doi.org/10.1155/S1023621X00000282

Zhu Changsheng, Heinz Ulbrich, "Bifurcation Behavior of a Flexible Rotor Supported on Nonlinear Squeeze Film Dampers without Centralized Springs", International Journal of Rotating Machinery, vol. 6, Article ID 496143, 12 pages, 2000. https://doi.org/10.1155/S1023621X00000282

Bifurcation Behavior of a Flexible Rotor Supported on Nonlinear Squeeze Film Dampers without Centralized Springs

Received17 Sep 1997
Revised17 Nov 1998

Abstract

In this paper, the bifurcation behavior of a flexible rotor supported on nonlinear squeeze film dampers without centralized springs is analyzed numerically by means of rotor trajectories, Poincar maps, bifurcation diagrams and power spectra, based on the short bearing and cavitated film assumptions. It is shown that there also exist two different operations (i.e., socalled bistable operations) in some speed regions in the rotor system supported on the nonlinear squeeze film dampers without centralized springs. In the bistable operation speed regions, the rotor system exhibits synchronous, sub-synchronous, sub-super-synchronous and almost-periodic as well as nonperiodic motions. The periodic bifurcation behaviors of the rotor system supported on nonlinear squeeze film dampers without centralized springs are very complex and require further investigations.

Copyright © 2000 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.


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