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Journal Articles

Rotor Damped Natural Frequencies and Stability Under Reduced Oil Supply Flow Rates to Tilting-Pad Journal Bearings

Bradley R. Nichols, Roger L. Fittro, Christopher P. Goyne

J. Eng. Gas Turbines Power. December 2018, 140(12): 122502.

Paper No: GTP-18-1036

DOI: https://doi.org/10.1115/1.4040813

Published Online: August 13, 2018

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Topics: Bearings, Damping, Flow (Dynamics), Stress, Stability, System dynamics

Journal Articles

Subsynchronous Vibration Patterns Under Reduced Oil Supply Flow Rates

Bradley R. Nichols, Roger L. Fittro, Christopher P. Goyne

J. Eng. Gas Turbines Power. October 2018, 140(10): 102503.

Paper No: GTP-17-1346

DOI: https://doi.org/10.1115/1.4038363

Published Online: July 9, 2018

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Topics: Bearings, Flow (Dynamics), Stress, Vibration, Rotors

Journal Articles

Steady-State Tilting-Pad Bearing Performance Under Reduced Oil Supply Flow Rates

Bradley R. Nichols, Roger L. Fittro, Christopher P. Goyne

J. Tribol. September 2018, 140(5): 051701.

Paper No: TRIB-17-1317

DOI: https://doi.org/10.1115/1.4039408

Published Online: April 3, 2018

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Topics: Bearings, Flow (Dynamics), Steady state, Temperature, Pressure, Cavitation, Engines, Motors

Proceedings Papers

Investigation of the American Petroleum Institute’s Support Stiffness Ratio Specification

David J. Griffin, Roger L. Fittro, Robert D. Rockwell, Christopher P. Goyne

Proc. ASME. GT2017, Volume 7B: Structures and Dynamics, V07BT33A002, June 26–30, 2017

Paper No: GT2017-63142

DOI: https://doi.org/10.1115/GT2017-63142

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Topics: Petroleum, Stiffness, American Petroleum Institute, Machinery, Separation (Technology), Bearings, Computer simulation, Design, Dynamics (Mechanics), Risk

Proceedings Papers

Non-Linear Time-Transient Rotor Dynamic Analyses of Geared Systems

Jason A. Kaplan, Roger L. Fittro, Alexandrina Untaroiu, Houston G. Wood

Proc. ASME. GT2015, Volume 7A: Structures and Dynamics, V07AT30A012, June 15–19, 2015

Paper No: GT2015-43481

DOI: https://doi.org/10.1115/GT2015-43481

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Topics: Dynamic analysis, Rotors, Transients (Dynamics), Bearings, Stiffness, Vibration, Degrees of freedom, Gears, Mechanical drives, Trains

Proceedings Papers

An Extended Reynolds Equation Including the Lubricant Inertia Effects: Application to Finite Length Water Lubricated Bearings

Saeid Dousti, Roger L. Fittro

Proc. ASME. GT2015, Volume 7A: Structures and Dynamics, V07AT31A025, June 15–19, 2015

Paper No: GT2015-43826

DOI: https://doi.org/10.1115/GT2015-43826

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Topics: Bearings, Inertia (Mechanics), Lubricants, Water, Turbulence, Computational fluid dynamics, Coolants, Geometry, Pumps, Seas

Proceedings Papers

Calibration of an 8-Pole Planar Radial Magnetic Actuator

Roger L. Fittro, Dan O. Baun, Eric H. Maslen, Paul E. Allaire

Proc. ASME. GT1997, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T14A006, June 2–5, 1997

Paper No: 97-GT-018

DOI: https://doi.org/10.1115/97-GT-018

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Topics: Actuators, Calibration, Poles (Building), Currents, Frequency response, Force measurement, Uncertainty, Bearings, Circuits, Clearances (Engineering)

Proceedings Papers

The μ Approach to Control of Active Magnetic Bearings

Roger L. Fittro, Carl R. Knospe

Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A050, May 8–11, 2000

Paper No: 2000-GT-0408

DOI: https://doi.org/10.1115/2000-GT-0408

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Topics: Magnetic bearings, Control equipment, Actuators, Machinery, Rotor vibration, Sensors