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Alan Palazzolo
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Journal Articles

Digital Twin Implementation for Three-Dimensional Rotordynamic Response via Physics-Informed LSTM Neural Networks

Jongin Yang, Joseph Oh, Baik Jin Kim, Alan Palazzolo
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. April 2024, 146(2): 021003.
Paper No: VIB-23-1240
https://doi.org/10.1115/1.4065714
Published Online: July 2, 2024
View Article titled, Digital Twin Implementation for Three-Dimensional Rotordynamic Response via Physics-Informed LSTM Neural Networks
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Topics: Artificial neural networks, Physics, Rotors, Rotordynamics, Digital twin
Proceedings Papers

Radial Interference Fit and Centrifugal Force Effects on Lateral Rotordynamic Response

Baik Jin Kim, Joseph Oh, Alan Palazzolo
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT26A006, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101837
https://doi.org/10.1115/GT2023-101837
View Paper titled, Radial Interference Fit and Centrifugal Force Effects on Lateral Rotordynamic Response
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Topics: Centrifugal force, Disks, Finite element analysis, Press fits
Journal Articles

Computational Fluid Dynamics Turbulence Model and Experimental Study for a Fontan Cavopulmonary Assist Device

Shreyas Sarfare, MD Shujan Ali, Alan Palazzolo, Mark Rodefeld, Tim Conover, Richard Figliola, Guruprasad Giridharan, Richard Wampler, Edward Bennett, Artem Ivashchenko
Journal: Journal of Biomechanical Engineering
Publisher: ASME
Article Type: Research-Article
J Biomech Eng. November 2023, 145(11): 111008.
Paper No: BIO-22-1323
https://doi.org/10.1115/1.4063088
Published Online: September 4, 2023
View Article titled, Computational Fluid Dynamics Turbulence Model and Experimental Study for a Fontan Cavopulmonary Assist Device
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Topics: Computational fluid dynamics, Pressure, Turbulence, Reynolds-averaged Navier–Stokes equations, Flow (Dynamics), Pumps, Shear stress
Journal Articles

Swirl Brake Design for Improved Rotordynamic Vibration Stability Based on Computational Fluid Dynamics System Level Modeling

MD Shujan Ali, Farzam Mortazavi, Alan Palazzolo
Journal: ASME Open Journal of Engineering
Publisher: ASME
Article Type: Research Papers
ASME Open J. Engineering. January 2023, 2: 021039.
Paper No: AOJE-23-1034
https://doi.org/10.1115/1.4062934
Published Online: July 25, 2023
View Article titled, Swirl Brake Design for Improved Rotordynamic Vibration Stability Based on Computational Fluid Dynamics System Level Modeling
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Topics: Brakes, Compressors, Computational fluid dynamics, Deformation, Design, Impellers, Pressure, Stiffness, Transients (Dynamics), Flow (Dynamics)
Journal Articles

Test and Theory for a Refined Structural Model of a Hirth Coupling

Baik Jin Kim, Joseph Oh, Alan Palazzolo
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2022, 144(3): 031027.
Paper No: GTP-21-1306
https://doi.org/10.1115/1.4052088
Published Online: February 21, 2022
View Article titled, Test and Theory for a Refined Structural Model of a Hirth Coupling
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Topics: Finite element analysis, Rotor assembly, Rotors, Stiffness, Stress, Stress concentration, Geometry, Pressure, Knudsen number, Couplings
Proceedings Papers

Drillstring Simulator: A Novel Software Model for Stick–Slip And Bit-Bounce Vibrations

Baik Jin Kim, Alan Palazzolo, Mohamed Gharib
Proc. ASME. IMECE2021, Volume 7A: Dynamics, Vibration, and Control, V07AT07A048, November 1–5, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-73717
https://doi.org/10.1115/IMECE2021-73717
View Paper titled, Drillstring Simulator: A Novel Software Model for Stick–Slip And Bit-Bounce Vibrations
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Topics: Computer software, Drill strings, Rocks, Stick-slip, Vibration
Proceedings Papers

System Level Analysis of Compressor Eye-Labyrinth Seal Rotordynamic Forces: A Computational Fluid Dynamics Approach

Md Shujan Ali, Farzam Mortazavi, Alan Palazzolo
Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT28A004, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59725
https://doi.org/10.1115/GT2021-59725
View Paper titled, System Level Analysis of Compressor Eye-Labyrinth Seal Rotordynamic Forces: A Computational Fluid Dynamics Approach
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Topics: Compressors, Computational fluid dynamics, Rotordynamics
Proceedings Papers

Test and Theory for a Refined Structural Model of a Hirth Coupling

Baik Jin Kim, Joseph Oh, Alan Palazzolo
Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT28A005, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59970
https://doi.org/10.1115/GT2021-59970
View Paper titled, Test and Theory for a Refined Structural Model of a Hirth Coupling
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Topics: Algorithms, Compressors, Computation, Deformation, Finishes, Finite element analysis, Finite element methods, Force measurement, Geometry, Modal analysis
Journal Articles

Tilt Pad Bearing Distributed Pad Inlet Temperature With Machine Learning—Part II: Morton Effect

Jongin Yang, Alan Palazzolo
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. June 2022, 144(6): 061802.
Paper No: TRIB-20-1504
https://doi.org/10.1115/1.4052172
Published Online: September 3, 2021
View Article titled, Tilt Pad Bearing Distributed Pad Inlet Temperature With Machine Learning—Part II: Morton Effect
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Topics: Finite element methods, Rotors, Simulation, Temperature, Transients (Dynamics), Fluid films, Bearings, Vibration
Journal Articles

Tilt Pad Bearing Distributed Pad Inlet Temperature With Machine Learning—Part I: Static and Dynamic Characteristics

Jongin Yang, Alan Palazzolo
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. June 2022, 144(6): 061801.
Paper No: TRIB-20-1503
https://doi.org/10.1115/1.4052171
Published Online: September 3, 2021
View Article titled, Tilt Pad Bearing Distributed Pad Inlet Temperature With Machine Learning—Part I: Static and Dynamic Characteristics
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Topics: Finite element methods, Fluid films, Temperature, Rotors, Bearings, Machine learning, Flow (Dynamics), Computational fluid dynamics, Temperature distribution, Fluids
Journal Articles

Design and Hardware in-the-Loop Validation of an Effective Super-Twisting Controller for Stick-Slip Suppression in Drill-String Systems

Abdelbasset Krama, Mohamed Gharib, Shady S. Refaat, Alan Palazzolo
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. November 2021, 143(11): 111008.
Paper No: DS-21-1004
https://doi.org/10.1115/1.4051853
Published Online: August 13, 2021
View Article titled, Design and Hardware in-the-Loop Validation of an Effective Super-Twisting Controller for Stick-Slip Suppression in Drill-String Systems
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Topics: Control equipment, Drill strings, Stick-slip, Hardware, Motors, Bits (Tools), Electromagnetic induction
Journal Articles

Computational Fluid Dynamics—Machine Learning Prediction of Machinery Coupling Windage Heating and Power Loss

Ahmad Dawahdeh, Joseph Oh, Tianbo Zhai, Alan Palazzolo
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. August 2021, 143(8): 082201.
Paper No: HT-20-1501
https://doi.org/10.1115/1.4051351
Published Online: June 28, 2021
View Article titled, Computational Fluid Dynamics—Machine Learning Prediction of Machinery Coupling Windage Heating and Power Loss
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Topics: Computational fluid dynamics, Machine learning, Simulation, Temperature
Proceedings Papers

Dynamic Characteristics of TEHD Tilt Pad Journal Bearing Simulation Including Multiple Mode Pad Flexibility Model

Jinsang Kim, Alan Palazzolo
Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 363-379, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0213
https://doi.org/10.1115/DETC1993-0213
View Paper titled, Dynamic Characteristics of TEHD Tilt Pad Journal Bearing Simulation Including Multiple Mode Pad Flexibility Model
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Topics: Bearings, Damping, Deflection, Deformation, Degrees of freedom, Equilibrium (Physics), Heat conduction, Heat transfer, Journal bearings, Lubricants
Proceedings Papers

Combined Piezoelectric-Hydraulic Actuator Based Active Vibration Control for Rotordynamic System

Punan Tang, Alan Palazzolo, Albert Kascak, Gerald Montague, Wenduan Li
Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration and Control of Mechanical Systems, 223-241, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0238
https://doi.org/10.1115/DETC1993-0238
View Paper titled, Combined Piezoelectric-Hydraulic Actuator Based Active Vibration Control for Rotordynamic System
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Topics: Actuators, Vibration control, Bulk modulus, Fluids, Leakage, Machinery, Piezoelectric actuators, Pistons, Rotors, Vibration
Proceedings Papers

An Innovative Design for Drillstring Testbed for High Pressure High Temperature Drilling

Randall Tucker, Alan Palazzolo, Mohamed Gharib
Proc. ASME. IMECE2020, Volume 8: Energy, V008T08A034, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23608
https://doi.org/10.1115/IMECE2020-23608
View Paper titled, An Innovative Design for Drillstring Testbed for High Pressure High Temperature Drilling
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Topics: Design, Drill strings, Drilling, High pressure (Physics), High temperature, Hardware, Pressure, Rocks, Torque, American Petroleum Institute
Proceedings Papers

A Nonlinear Magnetic Circuit Analysis of a Permanent Magnet Biased Homopolar Bearing

Andrew Kenny, Alan Palazzolo
Proc. ASME. DETC99, Volume 7A: 17th Biennial Conference on Mechanical Vibration and Noise, 1097-1104, September 12–16, 1999
Publisher: American Society of Mechanical Engineers
Paper No: DETC99/VIB-8257
https://doi.org/10.1115/DETC99/VIB-8257
View Paper titled, A Nonlinear Magnetic Circuit Analysis of a Permanent Magnet Biased Homopolar Bearing
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Topics: Bearings, Circuits, Magnetic bearings, Permanent magnets
Proceedings Papers

Optimized Realization of Fault-Tolerant Heteropolar Magnetic Bearings for Active Vibration Control

Uhn Joo Na, Alan Palazzolo
Proc. ASME. DETC99, Volume 7A: 17th Biennial Conference on Mechanical Vibration and Noise, 1105-1116, September 12–16, 1999
Publisher: American Society of Mechanical Engineers
Paper No: DETC99/VIB-8258
https://doi.org/10.1115/DETC99/VIB-8258
View Paper titled, Optimized Realization of Fault-Tolerant Heteropolar Magnetic Bearings for Active Vibration Control
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Topics: Magnetic bearings, Optimization, Vibration control
Proceedings Papers

Flow Field Instability and Rotordynamic Impedances for an Open Impeller Centrifugal Pump in Transient Four-Quadrant Regimes

Md Shujan Ali, Farzam Mortazavi, Alan Palazzolo
Proc. ASME. GT2020, Volume 10B: Structures and Dynamics, V10BT29A009, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14841
https://doi.org/10.1115/GT2020-14841
View Paper titled, Flow Field Instability and Rotordynamic Impedances for an Open Impeller Centrifugal Pump in Transient Four-Quadrant Regimes
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Topics: Centrifugal pumps, Computational fluid dynamics, Flow (Dynamics), Impellers, Transients (Dynamics)
Journal Articles

Three-Dimensional Solid Finite Element Contact Model for Rotordynamic Analysis: Experiment and Simulation

Joseph Oh, Baik Jin Kim, Alan Palazzolo
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. June 2021, 143(3): 031007.
Paper No: VIB-20-1347
https://doi.org/10.1115/1.4048556
Published Online: October 13, 2020
View Article titled, Three-Dimensional Solid Finite Element Contact Model for Rotordynamic Analysis: Experiment and Simulation
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Topics: Bearings, Finite element analysis, Rotor assembly, Rotors, Stiffness, Surface roughness, Stress
Journal Articles

A Review of Journal Bearing Thermal Effects on Rotordynamic Response

Dongil Shin, Jongin Yang, Xiaomeng Tong, Junho Suh, Alan Palazzolo
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. March 2021, 143(3): 031803.
Paper No: TRIB-19-1508
https://doi.org/10.1115/1.4048167
Published Online: September 21, 2020
View Article titled, A Review of Journal Bearing Thermal Effects on Rotordynamic Response
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Topics: Bearings, Computational fluid dynamics, Journal bearings, Modeling, Rotors, Temperature, Temperature effects, Viscosity, Fluids