Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Analysis of a flexible rotating shaft supported by hydrodynamic bearings considering uncertainties
Submission Author:
Layane Rodrigues de Souza Queiroz , GO
Co-Authors:
Layane Rodrigues de Souza Queiroz, Romes Antônio Borges, Aldemir Ap Cavalini Jr, Valder Steffen Jr
Presenter: Romes Antônio Borges
doi://10.26678/ABCM.COBEM2017.COB17-1887
Abstract
This paper considers the application of the Latin Hypercube sampling and the homogeneous Polynomial Chaos expansion aiming at considering uncertainties of a flexible rotor. The system contains two rigid discs and a horizontal shaft, which is supported by two cylindrical hydrodynamic bearings. The shaft is flexible and represented by a finite element model based on the Timoshenko beam theory. The hydrodynamic supporting forces are determined from the solution of the so-called Reynolds equation. Although hydrodynamic bearings can offer a long operation life, variations in the radial clearance and oil film temperature can affect the dynamic behavior of the system. In this context, this work is devoted to the analysis of uncertainties in the bearings radial clearance and oil film temperature affecting the dynamic behavior of the rotating machine. Computational tests showed that the Latin Hypercube and the Polynomial Chaos are able to approximate the deterministic solution precisely, where the Polynomial Chaos is indeed more accurate
Keywords
flexible rotor, Hydrodynamic bearing, polynomial chaos, Latin hypercube sampling
