Effect of bearing number on non-linear dynamic behaviour of aerodynamic non-circular journal bearing systems

Autor:	Karami A Mohammadi, F Bakhtiari-Nejad, R Rashidi
Rok vydání:	2009
Předmět:	Bearing (mechanical) Rotor (electric) Mechanical Engineering Mathematical analysis Surfaces and Interfaces Aerodynamics Reynolds equation Surfaces Coatings and Films law.invention Classical mechanics law Rigid rotor Equations for a falling body Bifurcation Poincaré map Mathematics
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 224:139-156
ISSN:	2041-305X 1350-6501
DOI:	10.1243/13506501jet645
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9b85fda3fcb879e7e46c37755f3a77b https://doi.org/10.1243/13506501jet645 Zobrazit plný text záznamu