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Research Papers: Gas Turbines: Structures and Dynamics

Effect of Misalignment on the Characteristics of Journal Bearings

[+] Author and Article Information
A. M. Ahmed

Department of Mechanical Power Engineering,  Cairo University, Giza 12316, Egyptamahmed@eng.cu.edu.eg

A. El-Shafei

Department of Mechanical Design and Production, Cairo University, Giza 12316, Egyptelshafei@ritec-eg.com

J. Eng. Gas Turbines Power 130(4), 042501 (Apr 09, 2008) (8 pages) doi:10.1115/1.2800347 History: Received May 21, 2007; Revised June 17, 2007; Published April 09, 2008

Due to the renewed interest in the effect of misalignment on the dynamic characteristics of journal bearings, this paper presents a study of the effect of misalignment on the dynamic characteristics of journal bearings. A 2D finite difference program is developed and used for this study. The results show that there are a total of 16 stiffness and 16 damping coefficients considering horizontal and vertical displacements and rotations. The variation of these coefficients with journal tilting (i.e., angular misalignment) is illustrated. It is shown that misalignment can have a significant effect on the bearings’ dynamic characteristics.

Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Misaligned journal bearing configuration

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Figure 2

Effect of varying ϕx on Kxx, W=137N

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Figure 3

Effect of varying ϕx on Kxx, W=304N

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Figure 4

Effect of varying ϕy on Kxx

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Figure 5

Effect of varying ϕx on Kyy

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Figure 6

Effect of varying ϕy on Kyy

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Figure 7

Effect of varying ϕx on Kxy

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Figure 8

Effect of varying ϕy on Kxy

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Figure 9

Effect of varying ϕx on Kyx

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Figure 10

Effect of varying ϕy on Kyx

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Figure 11

Effect of varying ϕx on Cyy

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Figure 12

Effect of varying ϕy on Cyy

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Figure 13

Effect of varying ϕx on KYϕx

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Figure 14

Effect of varying ϕx on KYϕy

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Figure 15

Effect of varying ϕx on CYϕy

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Figure 16

Effect of varying ϕx on KϕxY

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Figure 17

Effect of varying ϕx on Kϕyϕy

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Figure 18

Effect of varying ϕx on Cϕxϕx

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