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E. J. Hahn
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Proceedings Papers

Application of Transfer Matrices to Non-Linear Rotor Bearing Systems

A. Liew, N. S. Feng, E. J. Hahn
Proc. ASME. DETC99, Volume 7A: 17th Biennial Conference on Mechanical Vibration and Noise, 1049-1057, September 12–16, 1999
Paper No: DETC99/VIB-8263
DOI: https://doi.org/10.1115/DETC99/VIB-8263
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Topics: Bearings, Rotors
Proceedings Papers

Optimal Design of Squeeze Film Supports for Flexible Rotors

M. D. Rabinowitz, E. J. Hahn
Proc. ASME. GT1982, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries; Technology Resources; General, V005T13A009, April 18–22, 1982
Paper No: 82-GT-232
DOI: https://doi.org/10.1115/82-GT-232
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Topics: Design, Rotors, Vibration, Bearings, Computation, Lubricants, Lubrication, Pressure, Rotor vibration
Proceedings Papers

Experimental Evaluation of Squeeze Film Supported Flexible Rotors

M. D. Rabinowitz, E. J. Hahn
Proc. ASME. GT1982, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries; Technology Resources; General, V005T13A010, April 18–22, 1982
Paper No: 82-GT-233
DOI: https://doi.org/10.1115/82-GT-233
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Topics: Rotors, Errors, Lubricants, Uncertainty, Vibration, Viscosity
Proceedings Papers

Subharmonic Oscillations in Squeeze Film Damped Rotor Bearing Systems Without Centralizing Springs

Peter Y. P. Chen, E. J. Hahn, G. Y. Wang
Proc. ASME. GT1993, Volume 3C: General, V03CT17A089, May 24–27, 1993
Paper No: 93-GT-428
DOI: https://doi.org/10.1115/93-GT-428
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Topics: Bearings, Oscillations, Rotors, Springs, Equilibrium (Physics), Excitation, Stability
Proceedings Papers

An Improved Squeeze Film Damper for Rotor Vibration Control: Theoretical Results

J. Y. Zhao, I. W. Linnett, E. J. Hahn
Proc. ASME. GT1994, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T14A020, June 13–16, 1994
Paper No: 94-GT-109
DOI: https://doi.org/10.1115/94-GT-109
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Topics: Dampers, Rotor vibration, Damping, Rotors, Stiffness, Bearings, Springs
Proceedings Papers

Rolling Element Bearing Non-Linearity Effects

N. S. Feng, E. J. Hahn
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A034, May 8–11, 2000
Paper No: 2000-GT-0391
DOI: https://doi.org/10.1115/2000-GT-0391
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Topics: Rolling bearings, Bearings, Clearances (Engineering), Excitation, Rotors, Ball bearings, Deformation, Equations of motion, Stress, Transient analysis
Proceedings Papers

Transient Rotordynamic Modeling of Rolling Element Bearing Systems

A. Liew, N. S. Feng, E. J. Hahn
Proc. ASME. GT2001, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T03A021, June 4–7, 2001
Paper No: 2001-GT-0255
DOI: https://doi.org/10.1115/2001-GT-0255
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Topics: Modeling, Rolling bearings, Transients (Dynamics), Bearings, Clearances (Engineering), Stress, Aircraft, Ball bearings, Deformation, Dynamics (Mechanics)
Proceedings Papers

Effect of Bearing Profile on the Stability of Statically Indeterminate Rotor Bearing Systems

N. S. Feng, E. J. Hahn
Proc. ASME. IJTC2007, ASME/STLE 2007 International Joint Tribology Conference, Parts A and B, 315-317, October 22–24, 2007
Paper No: IJTC2007-44320
DOI: https://doi.org/10.1115/IJTC2007-44320
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Topics: Bearings, Rotors, Stability, Fluid films, Machinery, Stress
Proceedings Papers

Using Transient Solutions to Reynolds Equation to Determine Bearing Forces

N. S. Feng, E. J. Hahn, Y. Q. Lou
Proc. ASME. WTC2005, World Tribology Congress III, Volume 2, 67-68, September 12–16, 2005
Paper No: WTC2005-63392
DOI: https://doi.org/10.1115/WTC2005-63392
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Topics: Bearings, Transients (Dynamics), Rotors, Stability, Turbomachinery, Vibration
Proceedings Papers

Model Reduction of Large Rotor-Bearing-Foundation Systems

N. Zhang, W. Hu, E. J. Hahn
Proc. ASME. GT2006, Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 1331-1340, May 8–11, 2006
Paper No: GT2006-90941
DOI: https://doi.org/10.1115/GT2006-90941
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Topics: Bearings, Rotors
Journal Articles

Identification of the Modal Parameters of a Flexibly Supported Rigid Casing

N. Feng, Lecturer, E. J. Hahn, Professor
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 184–192.
DOI: https://doi.org/10.1115/1.1519265
Published Online: December 27, 2002
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Topics: Degrees of freedom, Gas turbines, Rotors, Vibration, Mode shapes, Inertia (Mechanics), Errors
Journal Articles

Transient Rotordynamic Modeling of Rolling Element Bearing Systems

A. Liew, Postgraduate Student, N. Feng, Lecturer, E. J. Hahn, Professor
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 984–991.
DOI: https://doi.org/10.1115/1.1479337
Published Online: September 24, 2002
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Topics: Bearings, Inertia (Mechanics), Modeling, Rotors, Stress, Rolling bearings, Transients (Dynamics), Clearances (Engineering), Deformation
Journal Articles

Vibration Analysis of Statically Indeterminate Rotors With Hydrodynamic Bearings

N. S. Feng, E. J. Hahn
Journal: Journal of Tribology
Article Type: Research Papers
J. Tribol. October 1998, 120(4): 781–788.
DOI: https://doi.org/10.1115/1.2833779
Published Online: October 1, 1998
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Topics: Bearings, Rotors, Vibration analysis, Stability, Computer software, Damping, Dimensions, Stiffness, Turbomachinery
Journal Articles

Dynamic Response of a Cracked Rotor With Some Comments on Crack Detection

G. Meng, E. J. Hahn
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 1997, 119(2): 447–455.
DOI: https://doi.org/10.1115/1.2815595
Published Online: April 1, 1997
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Topics: Crack detection, Dynamic response, Rotors, Fracture (Materials), Whirls, Shapes, Signals, Vibration, Excitation, Steady state
Journal Articles

Eccentric Operation and Blade-Loss Simulation of a Rigid Rotor Supported by an Improved Squeeze Film Damper

J. Y. Zhao, E. J. Hahn
Journal: Journal of Tribology
Article Type: Research Papers
J. Tribol. July 1995, 117(3): 490–497.
DOI: https://doi.org/10.1115/1.2831280
Published Online: July 1, 1995
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Topics: Blades, Dampers, Rotors, Simulation, Stiffness, Approximation, Bearings, Cavitation, Damping, Vibration
Journal Articles

Harmonic Balance Analysis of General Squeeze Film Damped Multidegree-of-Freedom Rotor Bearing Systems

E. J. Hahn, P. Y. P. Chen
Journal: Journal of Tribology
Article Type: Research Papers
J. Tribol. July 1994, 116(3): 499–507.
DOI: https://doi.org/10.1115/1.2928872
Published Online: July 1, 1994
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Topics: Bearings, Rotors, Dampers, Condensation, Damping, Design, Equilibrium (Physics), Nonlinear equations, Springs, Stability
Journal Articles

Limitations of the Short Bearing Approximation in Dynamically Loaded Narrow Hydrodynamic Bearings

M. A. Rezvani, E. J. Hahn
Journal: Journal of Tribology
Article Type: Research Papers
J. Tribol. July 1993, 115(3): 544–549.
DOI: https://doi.org/10.1115/1.2921672
Published Online: July 1, 1993
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Topics: Approximation, Bearings, Dampers, Transients (Dynamics), Dynamic testing (Materials), Errors, Fluid films, Journal bearings, Parametric design, Pressure
Journal Articles

Effects of Gas Entrainment on Squeeze Film Damper Performance

N. S. Feng, E. J. Hahn
Journal: Journal of Tribology
Article Type: Research Papers
J. Tribol. January 1987, 109(1): 149–154.
DOI: https://doi.org/10.1115/1.3261307
Published Online: January 1, 1987
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Topics: Dampers, Lubricants, Bearings, Delays, Fluid films, Gases, Machinery, Pressure, Reservoirs, Stress
Journal Articles

Stability of Squeeze Film Damped Multi-Mass Flexible Rotor Bearing Systems

L. J. McLean, E. J. Hahn
Journal: Journal of Tribology
Article Type: Research Papers
J. Tribol. July 1985, 107(3): 402–409.
DOI: https://doi.org/10.1115/1.3261094
Published Online: July 1, 1985
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Topics: Bearings, Rotors, Stability, Dampers, Equilibrium (Physics), Damping, Degrees of freedom, Design, Perturbation theory
Journal Articles

Closure to “Discussion of ‘Stability of Squeeze Film Damped Multi-Mass Flexible Rotor Bearing Systems’” (1985, ASME J. Tribol., 107, p. 409)

L. J. McLean, E. J. Hahn
Journal: Journal of Tribology
Article Type: Discussions
J. Tribol. July 1985, 107(3): 410.
DOI: https://doi.org/10.1115/1.3261096
Published Online: July 1, 1985
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Topics: Bearings, Rotors, Stability