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Sergio E. Díaz
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Proceedings Papers

Effect of Uncertainties in the Estimation of Dynamic Coefficients on Tilting Pad Journal Bearings

Rafael O. Ruiz, Sergio E. Diaz
Proc. ASME. IMECE2016, Volume 4B: Dynamics, Vibration, and Control, V04BT05A030, November 11–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2016-67252
https://doi.org/10.1115/IMECE2016-67252
View Paper titled, Effect of Uncertainties in the Estimation of Dynamic Coefficients on Tilting Pad Journal Bearings
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Topics: Journal bearings, Uncertainty, Clearances (Engineering), Bearings, Simulation, Density, Interpolation, Manufacturing, Probability, Statistical analysis
Proceedings Papers

Reduction of the Dynamic Load Capacity in a Squeeze Film Damper Operating With a Bubbly Lubricant

Sergio E. Diaz, Luis A. San Andrés
Proc. ASME. GT1998, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V005T14A015, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-109
https://doi.org/10.1115/98-GT-109
View Paper titled, Reduction of the Dynamic Load Capacity in a Squeeze Film Damper Operating With a Bubbly Lubricant
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Topics: Dampers, Lubricants, Stress, Pressure, Damping, Whirls, Bearings, Hydrostatics, Modeling, Porosity
Proceedings Papers

Air Entrainment vs. Lubricant Vaporization in Squeeze Film Dampers: An Experimental Assessment of Their Fundamental Differences

Sergio E. Diaz, Luis A. San Andrés
Proc. ASME. GT1999, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V004T03A020, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-187
https://doi.org/10.1115/99-GT-187
View Paper titled, Air Entrainment vs. Lubricant Vaporization in Squeeze Film Dampers: An Experimental Assessment of Their Fundamental Differences
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Topics: Air entrainment, Dampers, Lubricants, Cavitation, Whirls, Vapors, Air-breathing engines, Damping, Energy dissipation, Flow (Dynamics)
Proceedings Papers

Determining the Effect of Bearing Clearance and Preload Uncertainties on Tilting Pad Bearings Rotordynamic Coefficients

Juan C. Romero Quintini, Saira Pineda, José A. Matute, Luis U. Medina, José L. Gómez, Sergio E. Diaz
Proc. ASME. GT2014, Volume 7B: Structures and Dynamics, V07BT32A021, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26773
https://doi.org/10.1115/GT2014-26773
View Paper titled, Determining the Effect of Bearing Clearance and Preload Uncertainties on Tilting Pad Bearings Rotordynamic Coefficients
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Topics: Bearings, Clearances (Engineering), Uncertainty, Computer simulation, Design, Experimental design, Finite element model, Journal bearings, Manufacturing, Rotors
Proceedings Papers

A Novel Weldless Foils-Case Attachment for Gas Foil Bearings

Marcelo H. Di Liscia, Jose A. Matute, Gabriela S. Diaz, Sergio E. Diaz
Proc. ASME. GT2013, Volume 7B: Structures and Dynamics, V07BT30A012, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94402
https://doi.org/10.1115/GT2013-94402
View Paper titled, A Novel Weldless Foils-Case Attachment for Gas Foil Bearings
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Topics: Foil bearings, Bearings, Stiffness, Cycles, Damage, Failure, Fluids, Machinery, Manufacturing, Pressure
Proceedings Papers

On the Effect of Pad Clearance and Preload Manufacturing Tolerances on Tilting Pad Bearings Rotordynamic Coefficients

Jose L. Gomez, Saira Pineda, Sergio E. Diaz
Proc. ASME. GT2013, Volume 7B: Structures and Dynamics, V07BT30A022, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95214
https://doi.org/10.1115/GT2013-95214
View Paper titled, On the Effect of Pad Clearance and Preload Manufacturing Tolerances on Tilting Pad Bearings Rotordynamic Coefficients
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Topics: Bearings, Clearances (Engineering), Manufacturing, Stress, Finite element methods, Rotors, Turbomachinery
Proceedings Papers

Experimental Testing of a Magnetically Levitated Rotor With a Neural Network Controller

Alejandro Veloz, Juan C. Romero Quintini, Mónica Parada, Sergio E. Diaz
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 615-624, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69120
https://doi.org/10.1115/GT2012-69120
View Paper titled, Experimental Testing of a Magnetically Levitated Rotor With a Neural Network Controller
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Topics: Artificial neural networks, Control equipment, Rotors, Testing, Magnetic bearings, Vibration, Actuators, Architecture, Bearings, Computer simulation
Proceedings Papers

On Uncertainty Propagation in Mass, Damping and Stiffness Matrices Identification of Mechanical Systems

Luis U. Medina, Sergio E. Díaz, Ningsheng Feng, Eric J. Hahn
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 1031-1040, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68037
https://doi.org/10.1115/GT2012-68037
View Paper titled, On Uncertainty Propagation in Mass, Damping and Stiffness Matrices Identification of Mechanical Systems
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Topics: Damping, Stiffness, Uncertainty, Errors, Algorithms, Excitation, Modeling, Scalars, Signal processing
Proceedings Papers

A View to the Energy Dissipation Mechanism of a Gas Foil Bearing’s Structure due to Dry Friction

José A. Matute, Rafael O. Ruiz, Sergio E. Diaz
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 911-920, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68926
https://doi.org/10.1115/GT2012-68926
View Paper titled, A View to the Energy Dissipation Mechanism of a Gas Foil Bearing’s Structure due to Dry Friction
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Topics: Dry friction, Energy dissipation, Damping, Stick-slip, Stiffness, Computer software, Curve fitting, Deformation, Excitation, Foil bearings
Proceedings Papers

Comparison of Air Ingestion vs. Dimensionless Parameters in Squeeze Film Dampers

Jorge E. Torres, Sergio E. Diaz
Proc. ASME. IJTC2009, ASME/STLE 2009 International Joint Tribology Conference, 163-165, October 19–21, 2009
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2009-15023
https://doi.org/10.1115/IJTC2009-15023
View Paper titled, Comparison of Air Ingestion vs. Dimensionless Parameters in Squeeze Film Dampers
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Topics: Dampers, Bearings, Air entrainment, Damping, Dimensionless numbers, Flow (Dynamics), Numerical analysis, Pressure
Journal Articles

On the Numerical Prediction of Finite Length Squeeze Film Dampers Performance With Free Air Entrainment

Tilmer H. Méndez, Jorge E. Torres, Marco A. Ciaccia, Sergio E. Díaz
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2010, 132(1): 012501.
https://doi.org/10.1115/1.2981182
Published Online: September 29, 2009
View Article titled, On the Numerical Prediction of Finite Length Squeeze Film Dampers Performance With Free Air Entrainment
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Topics: Air entrainment, Bearings, Boundary-value problems, Dampers, Flow (Dynamics), Pressure, Density, Viscosity, Lubricants, Turbomachinery
Journal Articles

Asynchronous Dynamic Coefficients of a Three-Lobe Air Bearing

Rafael O. Ruiz, Marcelo H. Di Liscia, Luis U. Medina, Sergio E. Díaz
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2008, 130(5): 052502.
https://doi.org/10.1115/1.2772635
Published Online: June 18, 2008
View Article titled, Asynchronous Dynamic Coefficients of a Three-Lobe Air Bearing
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Topics: Air bearings, Bearings, Damping, Excitation, Stiffness, Magnetic bearings, Gas bearings, Whirls, Computer simulation, Rotors
Journal Articles

Flow Visualization and Forces From a Squeeze Film Damper Operating With Natural Air Entrainment

Luis San Andre´s, Sergio E. Diaz
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2003, 125(2): 325–333.
https://doi.org/10.1115/1.1510878
Published Online: March 19, 2003
View Article titled, Flow Visualization and Forces From a Squeeze Film Damper Operating With Natural Air Entrainment
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Topics: Air entrainment, Dampers, Flow (Dynamics), Flow visualization, Lubricants, Pressure, Whirls, Damping, Cavitation, Film thickness
Journal Articles

Pressure Measurements and Flow Visualization in a Squeeze Film Damper Operating With a Bubbly Mixture

Luis San Andre´s, Sergio E. Diaz
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2002, 124(2): 346–350.
https://doi.org/10.1115/1.1402133
Published Online: February 5, 2001
View Article titled, Pressure Measurements and Flow Visualization in a Squeeze Film Damper Operating With a Bubbly Mixture
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Topics: Dampers, Flow (Dynamics), Flow visualization, Lubricants, Pressure, Pressure measurement, Film thickness, Bubbles, Cavities, Whirls