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Journal Articles

A Matrix Solution for the Vibration Modes of Nonuniform Disks

F. F. Ehrich
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. March 1956, 23(1): 109–115.
https://doi.org/10.1115/1.4011216
Published Online: June 4, 2021
View Article titled, A Matrix Solution for the Vibration Modes of Nonuniform Disks
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Topics: Disks, Vibration, Strips, Boundary-value problems, Inertia (Mechanics), Elasticity, Deflection, Dimensions, Oscillating frequencies, Stress
Journal Articles

Closure to “Discussion of ‘A Matrix Solution for the Vibration Mode of Nonuniform Disks’” (1956, ASME J. Appl. Mech., 23, p. 481)

F. F. Ehrich
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Closures
J. Appl. Mech. September 1956, 23(3): 481–482.
https://doi.org/10.1115/1.4011366
Published Online: June 4, 2021
View Article titled, Closure to “Discussion of ‘A Matrix Solution for the Vibration Mode of Nonuniform Disks’” (1956, ASME J. Appl. Mech., 23, p. 481)
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Topics: Vibration
Proceedings Papers

Component Minimum Life Estimation Based on Life Testing Suspended Prior to Failure

Fredric F. Ehrich
Proc. ASME. DETC95, Volume 2: 11th Biennial Conference on Reliability, Stress Analysis, and Failure Prevention; 7th International Conference on Design Theory and Methodology; JSME Symposium on Design and Production; Mechanical Design Education and History; Computer-Integrated Concurrent Design Conference, 283-288, September 17–20, 1995
Publisher: American Society of Mechanical Engineers
Paper No: DETC1995-0163
https://doi.org/10.1115/DETC1995-0163
View Paper titled, Component Minimum Life Estimation Based on Life Testing Suspended Prior to Failure
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Topics: Failure, Life testing, Aerospace industry, Algorithms, Dimensions, Life extension, Linear programming, Testing
Proceedings Papers

Observed Rotordynamic Phenomena in Aircraft Gas Turbine Development

Fredric F. Ehrich
Proc. ASME. IDETC-CIE2015, Volume 8: 27th Conference on Mechanical Vibration and Noise, V008T13A080, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-48108
https://doi.org/10.1115/DETC2015-48108
View Paper titled, Observed Rotordynamic Phenomena in Aircraft Gas Turbine Development
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Topics: Aircraft, Gas turbines, Rotors, Anisotropy, Clearances (Engineering), Rotordynamics, Vibration, Aircraft engines, Design, Engines
Proceedings Papers

Design and Development Review of the T64 Turboprop/Turboshaft Engine

Frederic F. Ehrich
Proc. ASME. GT1961, ASME 1961 Gas Turbine Power Conference and Exhibit, V001T01A007, March 5–9, 1961
Publisher: American Society of Mechanical Engineers
Paper No: 61-GTP-7
https://doi.org/10.1115/61-GTP-7
View Paper titled, Design and Development Review of the T64 Turboprop/Turboshaft Engine
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Topics: Design, Engines, Aircraft engines, Navy, Weapons
Proceedings Papers

A Dynamic Model of Gas Turbine Engine Main Combustor Instability

F. F. Ehrich
Proc. ASME. GT1971, ASME 1971 International Gas Turbine Conference and Products Show, V001T01A073, March 28–April 1, 1971
Publisher: American Society of Mechanical Engineers
Paper No: 71-GT-73
https://doi.org/10.1115/71-GT-73
View Paper titled, A Dynamic Model of Gas Turbine Engine Main Combustor Instability
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Topics: Combustion chambers, Dynamic models, Gas turbines, Stability, Fuels, Combustion, Engines, Geometry, Heat, Orifices
Proceedings Papers

Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part I — Experiment

A. F. Storace, D. C. Wisler, H.-W. Shin, B. F. Beacher, F. F. Ehrich, Z. S. Spakovszky, M. Martinez-Sanchez, S. J. Song
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A073, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0565
https://doi.org/10.1115/2000-GT-0565
View Paper titled, Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part I — Experiment
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Topics: Axial flow, Compressors, Unsteady flow, Whirls, Rotors, Design, Turbomachinery, Aerodynamics, Engines, Fluid-dynamic forces
Proceedings Papers

Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part II — Analysis

F. F. Ehrich, Z. S. Spakovszky, M. Martinez-Sanchez, S. J. Song, D. C. Wisler, A. F. Storace, H.-W. Shin, B. F. Beacher
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A074, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0566
https://doi.org/10.1115/2000-GT-0566
View Paper titled, Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part II — Analysis
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Topics: Axial flow, Compressors, Unsteady flow, Whirls, Rotors, Turbomachinery, Actuators, Design, Disks, Displacement
Proceedings Papers

Development of High-Speed Gas Bearings for High-Power-Density Micro-Devices

F. F. Ehrich, S. A. Jacobson
Proc. ASME. GT2001, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T03A056, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0478
https://doi.org/10.1115/2001-GT-0478
View Paper titled, Development of High-Speed Gas Bearings for High-Power-Density Micro-Devices
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Topics: Density, Gas bearings, Bearings, Rotors, Turbomachinery, Bearing design, Bonding, Crystals, Design, Etching
Journal Articles

High-Speed Operation of a Gas-Bearing Supported MEMS-Air Turbine

C. J. Teo, L. X. Liu, H. Q. Li, L. C. Ho, S. A. Jacobson, F. F. Ehrich, A. H. Epstein, Z. S. Spakovszky
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 2009, 131(3): 032001.
https://doi.org/10.1115/1.3123343
Published Online: May 27, 2009
View Article titled, High-Speed Operation of a Gas-Bearing Supported MEMS-Air Turbine
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Topics: Bearings, Journal bearings, Rotors, Turbines, Gas bearings, Anisotropy, Flow (Dynamics), Microelectromechanical systems, Whirls, Thrust bearings
Proceedings Papers

A New Class of Asynchronous Rotordynamic Response in High-Speed Rotors

Fredric F. Ehrich
Proc. ASME. IDETC-CIE2007, Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C, 1783-1788, September 4–7, 2007
Publisher: American Society of Mechanical Engineers
Paper No: DETC2007-35912
https://doi.org/10.1115/DETC2007-35912
View Paper titled, A New Class of Asynchronous Rotordynamic Response in High-Speed Rotors
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Topics: Rotors, Bearings, Computer simulation, Excitation, Gas turbines, Stators, Stiffness, Turbomachinery, Vehicles
Proceedings Papers

High-Speed Operation of a Gas-Bearing Supported MEMS Air Turbine

C. J. Teo, L. X. Liu, H. Q. Li, L. C. Ho, S. A. Jacobson, F. F. Ehrich, A. H. Epstein, Z. S. Spakovszky
Proc. ASME. IJTC2006, Part B: Magnetic Storage Tribology; Manufacturing/Metalworking Tribology; Nanotribology; Engineered Surfaces; Biotribology; Emerging Technologies; Special Symposia on Contact Mechanics; Special Symposium on Nanotribology, 1303-1314, October 23–25, 2006
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2006-12173
https://doi.org/10.1115/IJTC2006-12173
View Paper titled, High-Speed Operation of a Gas-Bearing Supported MEMS Air Turbine
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Topics: Gas bearings, Microelectromechanical systems, Turbines, Bearings, Rotors, Geometry, Anisotropy, Journal bearings, Leakage flows, Machinery
Journal Articles

Development of High-Speed Gas Bearings for High-Power Density Microdevices

F. F. Ehrich, S. A. Jacobson
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 141–148.
https://doi.org/10.1115/1.1498273
Published Online: December 27, 2002
View Article titled, Development of High-Speed Gas Bearings for High-Power Density Microdevices
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Topics: Bearings, Design, Journal bearings, Manufacturing, Rotors, Semiconductor wafers, Hydrostatics, Thrust bearings, Silicon, Gas bearings
Journal Articles

Low-Order Models for Very Short Hybrid Gas Bearings

N. Savoulides, K. S. Breuer, Associate Professor,, S. Jacobson, F. F. Ehrich
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2001, 123(2): 368–375.
https://doi.org/10.1115/1.1308000
Published Online: June 16, 2000
View Article titled, Low-Order Models for Very Short Hybrid Gas Bearings
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Topics: Bearings, Gas bearings, Hydrostatics, Pressure, Stiffness, Damping, Rotors
Journal Articles

Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part I—Experiment

A. F. Storace, D. C. Wisler, H.-W. Shin, B. F. Beacher, F. F. Ehrich, Z. S. Spakovszky, M. Martinez-Sanchez, S. J. Song
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. July 2001, 123(3): 433–445.
https://doi.org/10.1115/1.1378299
Published Online: February 1, 2000
View Article titled, Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part I—Experiment
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Topics: Clearances (Engineering), Compressors, Rotors, Whirls, Airfoils, Stators, Blades, Pressure
Journal Articles

Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part II—Analysis

F. F. Ehrich, Z. S. Spakovszky, M. Martinez-Sanchez, S. J. Song, D. C. Wisler, A. F. Storace, H.-W. Shin, B. F. Beacher
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. July 2001, 123(3): 446–452.
https://doi.org/10.1115/1.1370165
Published Online: February 1, 2000
View Article titled, Unsteady Flow and Whirl-Inducing Forces in Axial-Flow Compressors: Part II—Analysis
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Topics: Clearances (Engineering), Compressors, Pressure, Rotors, Whirls, Blades, Stators
Journal Articles

Nonlinear Phenomena in Dynamic Response of Rotors in Anisotropic Mounting Systems

F. Ehrich
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. June 1995, 117(B): 154–161.
https://doi.org/10.1115/1.2836449
Published Online: June 1, 1995
View Article titled, Nonlinear Phenomena in Dynamic Response of Rotors in Anisotropic Mounting Systems
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Topics: Anisotropy, Dynamic response, Rotors, Computers, Machinery, Resonance, Vibration, Waves, Cascades (Fluid dynamics), Clearances (Engineering)
Journal Articles

Nonlinear Phenomena in Dynamic Response of Rotors in Anisotropic Mounting Systems

F. Ehrich
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. June 1995, 117(B): 154–161.
https://doi.org/10.1115/1.2838657
Published Online: June 1, 1995
View Article titled, Nonlinear Phenomena in Dynamic Response of Rotors in Anisotropic Mounting Systems
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Topics: Anisotropy, Dynamic response, Rotors, Computers, Machinery, Resonance, Vibration, Waves, Cascades (Fluid dynamics), Clearances (Engineering)
Journal Articles

Rotor Whirl Forces Induced by the Tip Clearance Effect in Axial Flow Compressors

F. Ehrich
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. October 1993, 115(4): 509–515.
https://doi.org/10.1115/1.2930379
Published Online: October 1, 1993
View Article titled, Rotor Whirl Forces Induced by the Tip Clearance Effect in Axial Flow Compressors
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Topics: Axial flow, Clearances (Engineering), Compressors, Rotors, Whirls, Torque, Aircraft, Aircraft engines, Blades, Deflection
Journal Articles

Spontaneous Sidebanding in High Speed Rotordynamics

F. F. Ehrich
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. October 1992, 114(4): 498–505.
https://doi.org/10.1115/1.2930291
Published Online: October 1, 1992
View Article titled, Spontaneous Sidebanding in High Speed Rotordynamics
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Topics: Aircraft, Computer simulation, Cycles, Gas turbines, Nonlinear systems, Rotordynamics, Rotors, Spectra (Spectroscopy), Springs, Stators