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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

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

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

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
Journal Articles

Some Observations of Chaotic Vibration Phenomena in High-Speed Rotordynamics

F. F. Ehrich
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. January 1991, 113(1): 50–57.
https://doi.org/10.1115/1.2930154
Published Online: January 1, 1991
View Article titled, Some Observations of Chaotic Vibration Phenomena in High-Speed Rotordynamics
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Topics: Rotordynamics, Vibration, Rotors, Clearances (Engineering), Computer simulation, Bifurcation, Springs, Turbomachinery
Journal Articles

Pseudo-High-Speed Balancing

F. F. Ehrich
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. October 1990, 112(4): 418–426.
https://doi.org/10.1115/1.2930123
Published Online: October 1, 1990
View Article titled, Pseudo-High-Speed Balancing
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Topics: Aircraft, Design, Gas turbines, Machinery, Mode shapes, Patents, Rotors, Vibration
Journal Articles

High Order Subharmonic Response of High Speed Rotors in Bearing Clearance

F. F. Ehrich
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. January 1988, 110(1): 9–16.
https://doi.org/10.1115/1.3269488
Published Online: January 1, 1988
View Article titled, High Order Subharmonic Response of High Speed Rotors in Bearing Clearance
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Topics: Bearings, Clearances (Engineering), Rotors, Vibration, Deflection, Excitation, Computers, Damping, Dynamic systems, Impulse (Physics)
Journal Articles

Editorial

F. F. Ehrich
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Editorial
J. Mech. Des. July 1982, 104(3): 527.
https://doi.org/10.1115/1.3256376
Published Online: July 1, 1982
View Article titled, Editorial
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Journal Articles

Sum and Difference Frequencies in Vibration of High Speed Rotating Machinery

F. F. Ehrich
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. February 1972, 94(1): 181–184.
https://doi.org/10.1115/1.3428109
Published Online: February 1, 1972
View Article titled, Sum and Difference Frequencies in Vibration of High Speed Rotating Machinery
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Topics: Machinery, Vibration, Excitation, Waves, Rotors, Emission spectroscopy, Gas turbines, Spectroscopy, Bearings, Clearances (Engineering)
Journal Articles

Aerodynamic Stability of Branched Diffusers

F. F. Ehrich
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 1970, 92(3): 330–334.
https://doi.org/10.1115/1.3445357
Published Online: July 1, 1970
View Article titled, Aerodynamic Stability of Branched Diffusers
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Topics: Diffusers, Stability, Combustion chambers, Computation, Flow (Dynamics), Pressure, Secondary cells, Shells, Diffusion (Physics), Gas turbines
Journal Articles

The Dynamic Stability of Rotor/Stator Radial Rubs in Rotating Machinery

F. F. Ehrich
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. November 1969, 91(4): 1025–1028.
https://doi.org/10.1115/1.3591743
Published Online: November 1, 1969
View Article titled, The Dynamic Stability of Rotor/Stator Radial Rubs in Rotating Machinery
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Topics: Dynamic stability, Machinery, Rotors, Stators, Damping, Stability, Blades, Clearances (Engineering), Coulombs, Dry friction