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Proceedings Papers

Fluid Inertia Forces in Squeeze Film Dampers

Proc. ASME. DETC91, 13th Biennial Conference on Mechanical Vibration and Noise: Rotating Machinery and Vehicle Dynamics, 219-228, September 22–25, 1991

Paper No: DETC1991-0249

DOI: https://doi.org/10.1115/DETC1991-0249

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Topics: Dampers, Fluids, Inertia (Mechanics), Approximation, Whirls, Reynolds number

Proceedings Papers

Modelling Fluid Inertia Forces of Short Journal Bearings for Rotordynamic Applications

A. El-Shafei

Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 129-137, September 19–22, 1993

Paper No: DETC1993-0187

DOI: https://doi.org/10.1115/DETC1993-0187

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Topics: Fluids, Inertia (Mechanics), Journal bearings, Modeling, Bearings, Pressure, Approximation, Damping, Engineering simulation, Film thickness

Journal Articles

Oil Whip Elimination Using Fuzzy Logic Controller

A. S. Dimitri, J. Mahfoud, A. El-Shafei

J. Eng. Gas Turbines Power. June 2016, 138(6): 062502.

Paper No: GTP-15-1385

DOI: https://doi.org/10.1115/1.4031759

Published Online: November 17, 2015

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Topics: Bearings, Control equipment, Fuzzy logic, Rotors, Vibration

Proceedings Papers

Unbalance Response of a Jeffcott Rotor Incorporating Short Squeeze Film Dampers

A. El-Shafei

Proc. ASME. GT1989, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T13A004, June 4–8, 1989

Paper No: 89-GT-75

DOI: https://doi.org/10.1115/89-GT-75

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Topics: Dampers, Rotors, Algorithms, Fluids, Inertia (Mechanics), Springs, Vibration isolation, Excitation, Resonance, Steady state

Proceedings Papers

Experimental and Analytical Investigation of Hybrid Squeeze Film Dampers

A. El-Shafei

Proc. ASME. GT1991, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V005T14A042, June 3–6, 1991

Paper No: 91-GT-250

DOI: https://doi.org/10.1115/91-GT-250

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Topics: Dampers, Flow (Dynamics), Machinery, Vibration, Control equipment, Patents, Rotors, Sealing (Process)

Proceedings Papers

Dynamic Analysis of Squeeze Film Damper Supported Rotors Using Equivalent Linearization

A. El-Shafei, R. V. Eranki

Proc. ASME. GT1993, Volume 2: Combustion and Fuels; Oil and Gas Applications; Cycle Innovations; Heat Transfer; Electric Power; Industrial and Cogeneration; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; IGTI Scholar Award, V002T12A004, May 24–27, 1993

Paper No: 93-GT-030

DOI: https://doi.org/10.1115/93-GT-030

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Topics: Dampers, Dynamic analysis, Rotors, Computation, Bearings, Design

Proceedings Papers

Development of a Test Rig and Experimental Verification of the Performance of HSFDs for Active Control of Rotors

A. El-Shafei, M. El-Hakim

Proc. ASME. GT1995, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V005T14A024, June 5–8, 1995

Paper No: 95-GT-256

DOI: https://doi.org/10.1115/95-GT-256

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Topics: Rotors, Feedback, Rotor vibration, Computer control, Computers, Control systems, Dampers, Data acquisition, Design, Hydraulic circuits

Proceedings Papers

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

J. P. Hathout, A. El-Shafei

Proc. ASME. GT1996, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T14A018, June 10–13, 1996

Paper No: 96-GT-123

DOI: https://doi.org/10.1115/96-GT-123

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Topics: Bearings, Rotors, Transients (Dynamics), Closed loop systems, Machinery, Vibration, Vibration control, Blades, Computers, Dampers

Proceedings Papers

Unbalance Response of a Multi-Mode Rotor Supported on Short Squeeze Film Dampers

R. Youssef, A. El-Shafei

Paper No: 96-GT-023

DOI: https://doi.org/10.1115/96-GT-023

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Topics: Dampers, Rotors, Algorithms, Differential equations, Polynomials, Steady state, Algebra, Design, Manufacturing, Modal analysis

Proceedings Papers

A Fast Method to Obtain the Nonlinear Response of Multi-Mode Rotors Supported on Squeeze Film Dampers Using Planar Modes: Part I — Theory

R. Y. Yakoub, A. El-Shafei

Proc. ASME. GT1998, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V005T14A039, June 2–5, 1998

Paper No: 98-GT-412

DOI: https://doi.org/10.1115/98-GT-412

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Topics: Dampers, Rotors, Polynomials, Algebra, Differential equations, Eigenvalues, Aircraft, Computers, Design, Gas turbines

Proceedings Papers

A Fast Method to Obtain the Nonlinear Response of Multi-Mode Rotors Supported on Squeeze Film Dampers Using Planar Modes: Part II — Parametric Studies

R. Y. Yakoub, A. El-Shafei

Proc. ASME. GT1998, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V005T14A040, June 2–5, 1998

Paper No: 98-GT-413

DOI: https://doi.org/10.1115/98-GT-413

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Topics: Dampers, Rotors, Algorithms, Aircraft, Computers, Gas turbines, Modal analysis, Polynomials

Proceedings Papers

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

A. El-Shafei, M. El-Hakim

Proc. ASME. GT1999, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V004T03A015, June 7–10, 1999

Paper No: 99-GT-176

DOI: https://doi.org/10.1115/99-GT-176

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Topics: Adaptive control, Rotors, Control equipment, Dampers, Computer control, Design, Engineering simulation, Shorelines, Simulation

Proceedings Papers

Oil Whip Elimination Using Fuzzy Logic Controller

A. S. Dimitri, J. Mahfoud, A. El-Shafei

Proc. ASME. GT2014, Volume 7A: Structures and Dynamics, V07AT31A028, June 16–20, 2014

Paper No: GT2014-26619

DOI: https://doi.org/10.1115/GT2014-26619

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Topics: Control equipment, Fuzzy logic, Bearings, Rotors, Vibration, Control algorithms, Electromagnetic actuators, Engineering prototypes, Geometry, Journal bearings

Proceedings Papers

Active Control Algorithms for the Control of Rotor Vibrations Using HSFDs

A. El-Shafei

Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A072, May 8–11, 2000

Paper No: 2000-GT-0564

DOI: https://doi.org/10.1115/2000-GT-0564

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Topics: Control algorithms, Rotor vibration, Control equipment, Gain scheduling, Rotors, Vibration, Dampers, Machinery

Proceedings Papers

Optimum Design of Squeeze Film Dampers Supporting Multiple-Mode Rotors

A. El-Shafei, R. Y. Yakoub

Proc. ASME. GT2001, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T03A022, June 4–7, 2001

Paper No: 2001-GT-0256

DOI: https://doi.org/10.1115/2001-GT-0256

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Topics: Dampers, Design, Rotors, Aircraft engines, Algorithms, Clearances (Engineering), Optimization, Springs, Stiffness

Journal Articles

Controlling Journal Bearing Instability Using Active Magnetic Bearings

A. El-Shafei, A. S. Dimitri

J. Eng. Gas Turbines Power. January 2010, 132(1): 012502.

DOI: https://doi.org/10.1115/1.3078785

Published Online: September 29, 2009

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Topics: Control equipment, Damping, Feedback, Journal bearings, Magnetic bearings, Rotors, Bearings

Proceedings Papers

Controlling Journal Bearing Instability Using Active Magnetic Bearings

A. El-Shafei, A. S. Dimitri

Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 983-993, May 14–17, 2007

Paper No: GT2007-28059

DOI: https://doi.org/10.1115/GT2007-28059

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Topics: Journal bearings, Magnetic bearings, Stress, Bearings, Control equipment, Damping, Load bearing capacity, Rotors, Whirls

Proceedings Papers

Rotor Balancing Without Trial Weights

A. El-Shafei, A. S. El-Kabbany, A. A. Younan

Proc. ASME. GT2002, Volume 4: Turbo Expo 2002, Parts A and B, 1117-1124, June 3–6, 2002

Paper No: GT2002-30633

DOI: https://doi.org/10.1115/GT2002-30633

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Topics: Calibration, Rotor balancing, Rotors, Vibration measurement

Proceedings Papers

Modeling Finite Squeeze Film Dampers

A. El-Shafei

Proc. ASME. GT2002, Volume 4: Turbo Expo 2002, Parts A and B, 1175-1186, June 3–6, 2002

Paper No: GT2002-30637

DOI: https://doi.org/10.1115/GT2002-30637

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Topics: Dampers, Modeling, Approximation, Bearings, Boundary-value problems, Pressure, Sealing (Process), Simulation

Proceedings Papers

Diagnosis of Installation Problems of Turbomachinery

A. El-Shafei

Proc. ASME. GT2002, Volume 4: Turbo Expo 2002, Parts A and B, 525-534, June 3–6, 2002

Paper No: GT2002-30284

DOI: https://doi.org/10.1115/GT2002-30284

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Topics: Turbomachinery, Vibration analysis, Deflection, Emission spectroscopy, Machinery, Resonance, Shapes, Spectroscopy, Testing

Journal citation

NARROW

Fluid Inertia Forces in Squeeze Film Dampers

Modelling Fluid Inertia Forces of Short Journal Bearings for Rotordynamic Applications

Oil Whip Elimination Using Fuzzy Logic Controller

Unbalance Response of a Jeffcott Rotor Incorporating Short Squeeze Film Dampers

Experimental and Analytical Investigation of Hybrid Squeeze Film Dampers

Dynamic Analysis of Squeeze Film Damper Supported Rotors Using Equivalent Linearization

Development of a Test Rig and Experimental Verification of the Performance of HSFDs for Active Control of Rotors

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

Unbalance Response of a Multi-Mode Rotor Supported on Short Squeeze Film Dampers

A Fast Method to Obtain the Nonlinear Response of Multi-Mode Rotors Supported on Squeeze Film Dampers Using Planar Modes: Part I — Theory

A Fast Method to Obtain the Nonlinear Response of Multi-Mode Rotors Supported on Squeeze Film Dampers Using Planar Modes: Part II — Parametric Studies

Experimental Investigation of Adaptive Control Applied to HSFD Supported Rotors

Oil Whip Elimination Using Fuzzy Logic Controller

Active Control Algorithms for the Control of Rotor Vibrations Using HSFDs

Optimum Design of Squeeze Film Dampers Supporting Multiple-Mode Rotors

Controlling Journal Bearing Instability Using Active Magnetic Bearings

Controlling Journal Bearing Instability Using Active Magnetic Bearings

Rotor Balancing Without Trial Weights

Modeling Finite Squeeze Film Dampers

Diagnosis of Installation Problems of Turbomachinery

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