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TECHNICAL PAPERS

A Ritz Model of Unsteady Oil-Film Forces for Nonlinear Dynamic Rotor-Bearing System

[+] Author and Article Information
Tiesheng Zheng, Shuhua Yang, Zhonghui Xiao, Wen Zhang

Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China

J. Appl. Mech 71(2), 219-224 (May 05, 2004) (6 pages) doi:10.1115/1.1640369 History: Received January 22, 2003; Revised June 05, 2003; Online May 05, 2004
Copyright © 2004 by ASME
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References

Lund, J. W., and Thomsen, K. K., 1978, “Calculation Method and Data for Dynamic Coefficients of Oil-Lubricated Journal Bearings,” Topics in Fluid film Bearings and Rotor Bearing System Design and Optimization, ASME, New York, pp. 1–28.
Brancati,  R., Rocca,  E., Russo,  M., and Russo,  R., 1995, “Journal Orbits and Their Stability for Rigid Unbalanced Rotor,” ASME J. Tribol., 117, pp. 709–716.
Choi,  S. K., and Noah,  S. T., 1994, “Mode-Locking and Chaos in a Jeffcott Rotor With Bearing Clearance,” ASME J. Appl. Mech., 61, pp. 131–138.
Capone,  G., 1991, “Descrizione Analitica del Campo di Forze Fluidodinamico nei Cuscinetti Lubrificati,” Energ. Elettr., 68(3), pp. 15–20.
Someya, T., 1988, Journal-Bearing Databook, Spinger-Verlag, Berlin.
Klit,  P., and Lund,  J. W., 1986, “Calculation of the Dynamic Coefficients of a Journal Bearing, Using a Variational Approach,” ASME J. Tribol., 108, pp. 421–425.
Zheng,  T., and Hasebe,  N., 2000, “Nonlinear Dynamic Behaviors of a Complex Rotor-Bearing System,” ASME J. Appl. Mech., 67, pp. 485–495.
Rohde,  S. M., and Mallister,  G. T., 1975, “A Variational Formulation for a Class of Free Boundary Problems Arising in Hydrodynamic Lubrication,” Int. J. Eng. Sci., 13, pp. 841–850.
Baiocchi, C., and Capelo, A., 1984, Variational and Quasivariational Inequalities Applications to Free Boundary Problems, John Wiley and Sons, New York.
Zheng,  T., and Hasebe,  N., 2000, “Calculation of Equilibrium Position and Dynamic Coefficients of a Journal Bearing Using Free Boundary Theory,” ASME J. Tribol., 122, pp. 616–621.

Figures

Grahic Jump Location
Local coordinates of a pad and journal in a journal bearing
Grahic Jump Location
Global coordinate system and bearing configuration
Grahic Jump Location
Journal orbits of periodic motions with different rotating speeds (κ=6.56, ρ=0.3, λ=1). (a) Synchronous motion (σ=10). (b) Period 5 motion (σ=25)
Grahic Jump Location
Chaotic motions computed by the oil-film force model of finite element method (κ=6.56, ρ=0.3, λ=1, σ=48)
Grahic Jump Location
Chaotic motions computed by the oil-film force model of present method (κ=6.56, ρ=0.3, λ=1, σ=48)

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