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TECHNICAL PAPERS

Stability Analysis of a Hydrodynamic Journal Bearing With Rotating Herringbone Grooves

[+] Author and Article Information
G. H. Jang, J. W. Yoon

PREM, Department of Mechanical Engineering, Hanyang University, Seoul, 133-791, Korea

J. Tribol 125(2), 291-300 (Mar 19, 2003) (10 pages) doi:10.1115/1.1506326 History: Received February 19, 2002; Revised July 10, 2002; Online March 19, 2003
Copyright © 2003 by ASME
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References

Figures

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Coordinate system of the hydrodynamic journal bearing with rotating herringbone grooves
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Variation of the dynamic coefficients of the hydrodynamic journal bearing at 15,000 rpm (ε=0.8 and Ng=4): (a) stiffness coefficient; and (b) damping coefficient.
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Variation of the direct stiffness coefficients for increasing rotational speed: (a) ε=0.4(Ng=4); (b) ε=0.4(Ng=8); (c) ε=0.8(Ng=4); and (d) ε=0.8(Ng=8).
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Variation of the cross-coupled stiffness coefficients for increasing rotational speed: (a) ε=0.4(Ng=4); (b) ε=0.4(Ng=8); (c) ε=0.8(Ng=4); and (d) ε=0.8(Ng=8).
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Variation of the damping coefficients for increasing rotational speed: (a) ε=0.4(Ng=4); (b) ε=0.4(Ng=8); (c) ε=0.8(Ng=4); and (d) ε=0.8(Ng=8).
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Stability chart of the hydrodynamic journal bearing with rotating grooves: (a) ε=0.4(Ng=4); (b) ε=0.4(Ng=8); (c) ε=0.8(Ng=4); and (d) ε=0.8(Ng=8).
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Time response of the whirl radius in the stable, critically stable and unstable positions: (a) stable; (b) critical; and (c) unstable.

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