Abstract
Abstract
The present article presents the effect of bearing number on non-linear dynamic behaviour of a rigid rotor supported by aerodynamic non-circular journal bearings. A finite-element method has been employed to solve the Reynolds equation in static and dynamical states and the dynamical equations are solved using the Runge-Kutta method. To analyse the behaviour of the rotor centre in the horizontal and vertical directions under different operating conditions, dynamic trajectory, power spectra, Poincare maps, and bifurcation diagrams are used. The results of this study reveal how the complex dynamic behaviour of these three types of non-circular bearing systems comprising periodic and KT-periodic responses of the rotor centre varies with changes in bearing number values.
Get full access to this article
View all access options for this article.