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research-article

Nonlinear Effects of Surface Texturing on the Performance of Journal Bearings in Flexible Rotordynamic Systems

[+] Author and Article Information
Jocelyn Rebufa

LTDS, Laboratoire de Tribologie et de Dynamique des Systémes, Ecole Centrale de Lyon, 69130 Ecully, FranceCEA, Commissariatá l'ènergie atomique et aux ènergies alternatives, DEN - DTEC 30200 Bagnols sur Céze, France
jrebufa@ec-lyon.fr

Fabrice Thouverez

LTDS, Laboratoire de Tribologie et de Dynamique des Systémes, Ecole Centrale de Lyon, 69130 Ecully, France
fabrice.thouverez@ec-lyon.fr

Erick Le Guyadec

CEA, Commissariatá l'ènergie atomique et aux ènergies alternatives, DEN - DTEC 30200 Bagnols sur Céze, France
erick.leguyadec@cea.fr

Denis Mazuyer

LTDS, Laboratoire de Tribologie et de Dynamique des Systémes, Ecole Centrale de Lyon, 69130 Ecully, France
denis.mazuyer@ec-lyon.fr

1Corresponding author.

ASME doi:10.1115/1.4034765 History: Received April 14, 2016; Revised August 25, 2016

Abstract

A dynamic model of a rotating shaft on two textured hydrodynamic journal bearings is presented. The hydrodynamic mean pressure is computed using multi-scale periodic homogenization and is projected on a flexible shaft with internal damping. Harmonic Balance Method (HBM) is used to study the limit cycles of unbalance response of the coupled system discretized by Finite Element Method (FEM). Stability is analyzed with Floquet multipliers computation. An example of an isotropic texturing pattern representing Laser dimples on a lightweight rotor is analyzed. Vibration amplitude and stability zone are compared with plain bearing lubrication. It is shown in an example that full surface texturing leads to relatively higher vibration amplitude compared to plain bearings.

Copyright (c) 2016 by ASME
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