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Steady-state behaviour of flexible rotordynamic systems with oil journal bearings

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Author: Vorst, E.L.B. van de · Fey, R.H.B. · Kraker, A. de · Campen, D.H. van
Type:article
Date:1996
Institution: Centrum voor Mechanische Constructies TNO
Source:Nonlinear Dynamics, 3, 11, 295-313
Identifier: 233591
Keywords: Industry · Finite-length bearing theory · Flexible rotor-bearing systems · Reduction technique · Two-point boundary value problems

Abstract

This paper deals with the long term behaviour of flexible rotor systems, which are supported by nonlinear bearings. A system consisting of a rotor and a shaft which is supported by one oil journal bearing is investigated numerically. The shaft is modelled using finite elements and reduced using a component mode synthesis method. The bearings are modelled using the finite-length bearing theory. Branches of periodic solutions are calculated for three models of the system with an unbalance at the rotor. Also self-excited oscillations are calculated for the three models if no mass unbalance is present. The results show that a mass unbalance can stabilize rotor oscillations. © 1996 Kluwer Academic Publishers.