In:
Journal of Tribology, ASME International, Vol. 126, No. 1 ( 2004-01-01), p. 125-131
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.
Type of Medium:
Online Resource
ISSN:
0742-4787
,
1528-8897
Language:
English
Publisher:
ASME International
Publication Date:
2004
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