Alternation of the dynamic coefficients of short journal bearings due to wear

Date published

2015-05-31

Free to read from

Supervisor/s

Journal Title

Journal ISSN

Volume Title

Publisher

Emerald

Department

Type

Article

ISSN

1757-9864

Format

Citation

Michael G. Papanikolaou, Michael G. Farmakopoulos and Chris A. Papadopoulos. Alternation of the dynamic coefficients of short journal bearings due to wear. International Journal of Structural Integrity, Volume 6, Issue 5, 2015, pp. 649-664

Abstract

Purpose – Wear in journal bearings occurs when the operating conditions (high load, high temperature,low angular velocity or low viscosity), downgrade the ability of the bearing to carry load. The wear depth increases because the rotor comes in contact with the bearing surface. Wear in journal bearings affects their characteristics because of its influence on the thickness of the fluid film. This influence can be detected in the dynamic behavior of the rotor and especially in the dynamic stiffness and damping coefficients. The paper aims to discuss these issues. Design/methodology/approach – In this paper, the effect of wear on the rotor dynamic stiffness and damping coefficients (K and C) of a short journal bearing is investigated. K and C in this work are estimated by using two methods a semi-analytical method and finite element (FE) analysis implemented in the ANSYS software. Findings – The main goal of this research is to make the identification of wear in journal bearings feasible by observing the alternation of their dynamic coefficients. Both of the methods implemented are proven to be useful, while FE analysis can provide more accurate results. Originality/value – This paper is original and has not been published elsewhere.

Description

Software Description

Software Language

Github

Keywords

Wear, dynamic coefficients, hydrodynamic journal bearing

DOI

Rights

Attribution-NonCommercial 4.0 International

Relationships

Relationships

Supplements

Funder/s