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Journal Articles

Oil Whip Elimination Using Fuzzy Logic Controller

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A. S. Dimitri, J. Mahfoud, A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2016, 138(6): 062502.
Paper No: GTP-15-1385
https://doi.org/10.1115/1.4031759
Published Online: November 17, 2015
View Articletitled, Oil Whip Elimination Using Fuzzy Logic Controller
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Topics: Bearings, Control equipment, Fuzzy logic, Rotors, Vibration
Journal Articles

Controlling Journal Bearing Instability Using Active Magnetic Bearings

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A. El-Shafei, A. S. Dimitri
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2010, 132(1): 012502.
https://doi.org/10.1115/1.3078785
Published Online: September 29, 2009
View Articletitled, Controlling Journal Bearing Instability Using Active Magnetic Bearings
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Topics: Control equipment, Damping, Feedback, Journal bearings, Magnetic bearings, Rotors, Bearings
Journal Articles

Model Calibration of Anisotropic Rotordynamic Systems With Speed-Dependent Parameters

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A. A. Younan, A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2008, 130(4): 042502.
https://doi.org/10.1115/1.2770485
Published Online: April 24, 2008
View Articletitled, Model Calibration of Anisotropic Rotordynamic Systems With Speed-Dependent Parameters
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Topics: Anisotropy, Bearings, Calibration, Damping, Eigenvalues, Stiffness, Rotors
Journal Articles

Effect of Misalignment on the Characteristics of Journal Bearings

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A. M. Ahmed, A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2008, 130(4): 042501.
https://doi.org/10.1115/1.2800347
Published Online: April 9, 2008
View Articletitled, Effect of Misalignment on the Characteristics of Journal Bearings
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Topics: Bearings, Damping, Journal bearings, Stiffness, Stress
Journal Articles

Neural Network and Fuzzy Logic Diagnostics of 1x Faults in Rotating Machinery

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A. El-Shafei, T. A. F. Hassan, A. K. Soliman, Y. Zeyada, N. Rieger
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2007, 129(3): 703–710.
https://doi.org/10.1115/1.2227417
Published Online: February 1, 2006
View Articletitled, Neural Network and Fuzzy Logic Diagnostics of 1x Faults in Rotating Machinery
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Topics: Artificial neural networks, Fuzzy logic, Machinery
Journal Articles

Rotor Balancing Without Trial Weights

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A. El-Shafei, A. S. El-Kabbany, A. A. Younan
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2004, 126(3): 604–609.
https://doi.org/10.1115/1.1762903
Published Online: August 11, 2004
View Articletitled, Rotor Balancing Without Trial Weights
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Topics: Rotors, Vibration, Vibration measurement
Journal Articles

Some Experiments on Oil Whirl and Oil Whip

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A. El-Shafei, S. H. Tawfick, M. S. Raafat, G. M. Aziz
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2007, 129(1): 144–153.
https://doi.org/10.1115/1.2181185
Published Online: March 1, 2004
View Articletitled, Some Experiments on Oil Whirl and Oil Whip
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Topics: Bearings, Rotors, Whirls, Journal bearings, Stability, Vibration, Spectra (Spectroscopy)
Journal Articles

Optimum Design of Squeeze Film Dampers Supporting Multiple-Mode Rotors

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A. El-Shafei, Associate Professor, R. Y. K. Yakoub
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 992–1002.
https://doi.org/10.1115/1.1479338
Published Online: September 24, 2002
View Articletitled, Optimum Design of Squeeze Film Dampers Supporting Multiple-Mode Rotors
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Topics: Dampers, Design, Rotors, Optimization, Clearances (Engineering)
Journal Articles

Active Control Algorithms for the Control of Rotor Vibrations Using Hybrid Squeeze Film Dampers

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A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2002, 124(3): 598–607.
https://doi.org/10.1115/1.1421058
Published Online: June 19, 2002
View Articletitled, Active Control Algorithms for the Control of Rotor Vibrations Using Hybrid Squeeze Film Dampers
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Topics: Control equipment, Dampers, Rotors, Control algorithms
Journal Articles

The Nonlinear Response of Multimode Rotors Supported on Squeeze Film Dampers

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R. Y. Yakoub, A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2001, 123(4): 839–848.
https://doi.org/10.1115/1.1370974
Published Online: December 1, 2000
View Articletitled, The Nonlinear Response of Multimode Rotors Supported on Squeeze Film Dampers
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Topics: Algorithms, Dampers, Rotors
Journal Articles

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

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A. El-Shafei, M. El-Hakim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2000, 122(4): 685–692.
https://doi.org/10.1115/1.1287264
Published Online: May 15, 2000
View Articletitled, Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors
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Topics: Control equipment, Dampers, Rotors, Adaptive control, Design
Journal Articles

PI Control of HSFDs for Active Control of Rotor-Bearing Systems

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J. P. Hathout, A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 1997, 119(3): 658–667.
https://doi.org/10.1115/1.2817035
Published Online: July 1, 1997
View Articletitled, PI Control of HSFDs for Active Control of Rotor-Bearing Systems
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Topics: Bearings, Rotors, Transients (Dynamics), Closed loop systems, Machinery, Rotor vibration, Vibration control, Blades, Computers, Dampers
Journal Articles

Modeling and Control of HSFDs for Active Control of Rotor-Bearing Systems

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A. El-Shafei, J. P. Hathout
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 1995, 117(4): 757–766.
https://doi.org/10.1115/1.2815462
Published Online: October 1, 1995
View Articletitled, Modeling and Control of HSFDs for Active Control of Rotor-Bearing Systems
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Topics: Bearings, Control modeling, Rotors, Dampers, Sealing (Process), Open loop systems, Rotor vibration, Transients (Dynamics), Circuits, Computers
Journal Articles

Dynamic Analysis of Squeeze Film Damper Supported Rotors Using Equivalent Linearization

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A. El-Shafei, R. V. Eranki
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 1994, 116(3): 682–691.
https://doi.org/10.1115/1.2906874
Published Online: July 1, 1994
View Articletitled, Dynamic Analysis of Squeeze Film Damper Supported Rotors Using Equivalent Linearization
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Topics: Dampers, Dynamic analysis, Rotors, Computation, Design
Journal Articles

Experimental and Analytical Investigation of Hybrid Squeeze Film Dampers

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A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 1993, 115(2): 353–359.
https://doi.org/10.1115/1.2906716
Published Online: April 1, 1993
View Articletitled, Experimental and Analytical Investigation of Hybrid Squeeze Film Dampers
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Topics: Dampers, Flow (Dynamics), Machinery, Vibration, Control equipment, Patents, Rotors, Sealing (Process)
Journal Articles

Unbalance Response of a Jeffcott Rotor Incorporating Short Squeeze Film Dampers

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A. El-Shafei
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 1990, 112(4): 445–453.
https://doi.org/10.1115/1.2906188
Published Online: October 1, 1990
View Articletitled, Unbalance Response of a Jeffcott Rotor Incorporating Short Squeeze Film Dampers
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Topics: Dampers, Rotors, Algorithms, Fluids, Inertia (Mechanics), Springs, Vibration isolation, Excitation, Resonance, Steady state