Optimal clearance configuration of fluid-film journal bearings for stability improvement

Koichi Matsuda, Yoichi Kanemitsu, Shinya Kijimoto

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

This paper aims to optimize a clearance configuration of fluid-film journal bearings. In order to improve stability of a rotating-machinery system, a performance index is given by summing the squared values of the attitude-angles over a region of eccentricity. A Fourier series is used to represent an arbitrary clearance configuration of a bearing, and the problem is to find the Fourier coefficients to minimize the performance index. The problem is numerically solved by a kind of the conjugate gradient method to yield a unique clearance configuration. The optimal clearance configuration is computed for various ratios of length to diameter of a bearing. A rigid-rotor system is used to verify that the designed bearing improves the system stability compared with that of a full circular bearing and to show that this optimization is more effective for shorter bearings.

Original languageEnglish
Pages (from-to)125-131
Number of pages7
JournalJournal of Tribology
Volume126
Issue number1
DOIs
Publication statusPublished - Jan 1 2004

Fingerprint

Bearings (structural)
journal bearings
fluid films
Journal bearings
clearances
Fluids
configurations
Rigid rotors
systems stability
rigid rotors
conjugate gradient method
Rotating machinery
Conjugate gradient method
Fourier series
machinery
System stability
eccentricity
optimization
coefficients

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Optimal clearance configuration of fluid-film journal bearings for stability improvement. / Matsuda, Koichi; Kanemitsu, Yoichi; Kijimoto, Shinya.

In: Journal of Tribology, Vol. 126, No. 1, 01.01.2004, p. 125-131.

Research output: Contribution to journalArticle

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