Damping Ratio and Natural Frequency Bifurcations in Rotating Systems

MI Friswell (University of Wales Swansea), JET Penny (Aston University), SD Garvey (University of Nottingham) & AW Lees (University of Wales Swansea)

Journal of Sound and Vibration, Vol. 245, No. 5, August 2001, pp. 960-967


Campbell diagrams are very common in the analysis of rotating machines. They show the variation of natural frequencies as a function of rotational speed. Typically the natural frequencies change with speed because of gyroscopic effects and bearing characteristics. Usually the topology of the Campbell diagram is very simple, particularly if the supports are isotropic and the rotor symmetric. The main purpose of this paper is show that viscous damping in the bearings can produce bifurcations in both the Campbell diagram and the plot of damping ratio against shaft speed.

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This material has been published in the Journal of Sound and Vibration, Vol. 245, No. 5, August 2001, pp. 960-967, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by Academic Press. This material may not be copied or reposted without explicit permission.

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Link to paper using doi:10.1006/jsvi.2001.3578

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