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TECHNICAL PAPERS

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

[+] Author and Article Information
Cheng-Chi Wang, Cha’o-Kuang Chen

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

Cheng-Ying Lo

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

J. Tribol 124(3), 553-561 (May 31, 2002) (9 pages) doi:10.1115/1.1467637 History: Received July 19, 2001; Revised January 22, 2002; Online May 31, 2002
Copyright © 2002 by ASME
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References

Figures

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(a) Model of a flexible rotor supported by two externally pressurized porous gas journal bearings; and (b) cross section of a externally pressurized porous gas journal bearing
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The trajectory of rotor center at mr=2.0, 6.0, 9.06, 9.5, 10.0, 11.0 kg (Figs. 2.1(a)–2.6(a)) and the trajectory of journal center (Figs. 2.1(b)–2.6(b)), and (Figs. 2.1(c)–2.6(c)) and (Figs. 2.1(d)–2.6(d)) the power spectrum of rotor displacement in horizontal and vertical direction
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Bifurcation diagrams: (a) X2(nT) and (b) Y2(nT) versus rotor mass mr
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The local bifurcation diagram of (a) X2(nT) and (b) Y2(nT) versus rotor mass mr(8.0<mr<10.0 kg)
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The Poincaré maps of rotor center trajectory at (a) mr=2.0, (b) 6.0, (c) 9.5, and (d) 11.0 kg
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The trajectory of rotor center at Λ=1.2, 2.0, 2.44, 2.5, 2.6, 2.7 (Figs. 6.1(a)–6.6(a)) and the trajectory of journal center (Figs. 6.1(a)–6.6(b)), and (Figs. 6.1(c)–6.6(c)) and (Figs. 6.1(d)–6.6(d)) the power spectrum of rotor displacement in horizontal and vertical direction
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Bifurcation diagrams: (a) X2(nT) and (b) Y2(nT) versus bearing number Λ
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The local bifurcation diagram of (a) X2(nT) and (b) Y2(nT) versus bearing number Λ (2.4<Λ<2.7)
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The Poincaré maps of rotor center trajectory at (a) Λ=1.2, (b) 2.0, (c) 2.44, and (d) 2.6

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