Publication detail
Calculation of stiffness and damping coefficients of hydrodynamic lemon-bore journal bearings
POKORNÝ, J. NÁVRAT, T.
English title
Calculation of stiffness and damping coefficients of hydrodynamic lemon-bore journal bearings
Type
article in a collection out of WoS and Scopus
Language
en
Original abstract
This paper deals with a calculation of stiffness and damping coefficients of the hydrodynamic lemon-bore journal bearings of the finite length. The hydrodynamic pressure distribution is described by the dynamic Reynolds equation solved using the finite volume method. The variable temperature in the circumferential and axial directions of the bearing is considered in the calculation resulting in changes of the lubricant viscosity and density. The proposed computational model involves the mixing of the lubricant, obtaining a steady-state solution of the pressure and temperature, and establishing the equilibrium position of the journal. Based on the small dynamic displacements of the journal from the equilibrium position, the stiffness and damping coefficients are determined. The results of these dynamic characteristics are presented in dependence on speed for the selected load of the particular lemon-bore bearing.
English abstract
This paper deals with a calculation of stiffness and damping coefficients of the hydrodynamic lemon-bore journal bearings of the finite length. The hydrodynamic pressure distribution is described by the dynamic Reynolds equation solved using the finite volume method. The variable temperature in the circumferential and axial directions of the bearing is considered in the calculation resulting in changes of the lubricant viscosity and density. The proposed computational model involves the mixing of the lubricant, obtaining a steady-state solution of the pressure and temperature, and establishing the equilibrium position of the journal. Based on the small dynamic displacements of the journal from the equilibrium position, the stiffness and damping coefficients are determined. The results of these dynamic characteristics are presented in dependence on speed for the selected load of the particular lemon-bore bearing.
Keywords in English
hydrodynamic; lemon-bore journal bearing; Reynolds equation; stiffness; damping
Released
03.11.2021
Publisher
University of West Bohemia
Location
Plzeň
ISBN
978-80-261-1059-0
Book
Proceedings of Computational mechanics 2021
Pages from–to
192–195
Pages count
4
BIBTEX
@inproceedings{BUT173053,
author="Jan {Pokorný} and Tomáš {Návrat},
title="Calculation of stiffness and damping coefficients of hydrodynamic lemon-bore journal bearings",
booktitle="Proceedings of Computational mechanics 2021",
year="2021",
month="November",
pages="192--195",
publisher="University of West Bohemia",
address="Plzeň",
isbn="978-80-261-1059-0"
}