Nonlinear Dynamic Analysis of a Flexible Rotor Supported by Externally Pressurized Porous Gas Journal Bearings-Reference-Cited by-同舟云学术

Nonlinear Dynamic Analysis of a Flexible Rotor Supported by Externally Pressurized Porous Gas Journal Bearings

Published:2002-05-31 Issue:3 Volume:124 Page:553-561
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Wang Cheng-Chi¹,Lo Cheng-Ying²,Chen Cha’o-Kuang¹

Affiliation:

1. Department of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan, ROC

2. Department of Aeronautical Engineering, National Hu-Wei Institute of Technology, Huwei, Yulin, Taiwan, ROC

Abstract

This paper studies the nonlinear dynamic analysis of a flexible rotor supported by externally pressurized porous gas journal bearings. A time-dependent mathematical model for externally pressurized porous gas journal bearings is presented. The finite difference method and the Successive Over Relation (S.O.R.) method are employed to solve the modified Reynolds’ equation. The system state trajectory, Poincare´ maps, power spectra, and bifurcation diagrams are used to analyze the dynamic behavior of the rotor and journal center in the horizontal and vertical directions under different operating conditions. The analysis reveals a complex dynamic behavior comprising periodic and quasi-periodic response of the rotor and journal center. This paper shows how the dynamic behavior of this type of system varies with changes in rotor mass and bearing number. The results of this study contribute to a further understanding of the nonlinear dynamics of gas-lubricated, externally pressurized, porous rotor-bearing systems.

Publisher

ASME International

Subject

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

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/124/3/553/5819829/553_1.pdf

Reference25 articles.

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2. Ausman, J. S. , 1963, “Linearized ph Stability Theory for Translatory Half-Speed Whirl of Long Self-Acting Gas-Lubricated Journal Bearings,” ASME J. Basic Eng., 83, pp. 611–619.

3. Sneck, H. J., and Yen, K. T., 1964, “The Externally Pressurized, Porous Wall, Gas—Lubricated Journal Bearing, I,” ASLE Trans., 7, pp. 288–298.

4. Sneck, H. J., and Elwell, R. C., 1965, “The Externally Pressurized, Porous Wall, Gas—Lubricated Journal Bearing, II,” ASLE Trans., 8, pp. 339–345.

5. Majumdar, B. C. , 1975, “Analysis of Externally Pressurized Porous Wall Gas Journal Bearings-I,” Wear, 33, pp. 25–35.

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