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Jeffrey L. Kauffman
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Proceedings Papers

A Novel Low-Cost Approach to Testing High-Cycle Fatigue Limits

Luis Mendez Betances, Samer Armaly, Jeffrey L. Kauffman
Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT24A009, June 13–17, 2022
Paper No: GT2022-82658
DOI: https://doi.org/10.1115/GT2022-82658
View Paper titled, A Novel Low-Cost Approach to Testing High-Cycle Fatigue Limits
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Topics: High cycle fatigue, Testing, Vibration, Cycles, Engines, Feedback, Motors, Cantilevers, Control equipment, Displacement
Proceedings Papers

The Impact of Mistuning and Material Damping on Bladed Disks of Similar Geometries

Jarred A. Nix, Andres M. Rodriguez, Jeffrey L. Kauffman
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A017, June 13–17, 2022
Paper No: GT2022-82309
DOI: https://doi.org/10.1115/GT2022-82309
View Paper titled, The Impact of Mistuning and Material Damping on Bladed Disks of Similar Geometries
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Topics: Damping, Disks, Blades, Manufacturing, Frequency response, Friction, Rotors, Turbomachinery, Vibration
Proceedings Papers

Undergraduate Hypersonics Research: Lessons From Two Years of the REU Site HYPER

Jeffrey L. Kauffman, Ali P. Gordon
Proc. ASME. GT2022, Volume 5: Education; Electric Power; Fans and Blowers, V005T08A002, June 13–17, 2022
Paper No: GT2022-81021
DOI: https://doi.org/10.1115/GT2022-81021
View Paper titled, Undergraduate Hypersonics Research: Lessons From Two Years of the REU Site HYPER
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Topics: Undergraduate students, Students, Mentoring, Aerospace engineering, Career development, Engineers, Graduate students, Trains, Transportation systems, Turbomachinery
Journal Articles

Optimizing Piezoelectric Material Location and Size for Multiple-Mode Vibration Reduction of Turbomachinery Blades

Christopher R. Kelley, Garrett K. Lopp, Jeffrey L. Kauffman
Journal: Journal of Vibration and Acoustics
Article Type: Research Papers
J. Vib. Acoust. April 2021, 143(2): 021007.
Paper No: VIB-19-1477
DOI: https://doi.org/10.1115/1.4048263
Published Online: September 28, 2020
View Article titled, Optimizing Piezoelectric Material Location and Size for Multiple-Mode Vibration Reduction of Turbomachinery Blades
Click here to open pdf in another window PDF for Optimizing Piezoelectric Material Location and Size for Multiple-Mode Vibration Reduction of Turbomachinery Blades
Topics: Blades, Optimization, Piezoelectric materials, Stiffness, Turbomachinery, Vibration
Proceedings Papers

Effect of Switching Impulse on Piezoelectric-Based Vibration Reduction With Multiple Patches

Christopher R. Kelley, Jeffrey L. Kauffman
Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT35A026, June 17–21, 2019
Paper No: GT2019-91832
DOI: https://doi.org/10.1115/GT2019-91832
View Paper titled, Effect of Switching Impulse on Piezoelectric-Based Vibration Reduction With Multiple Patches
Click here to open pdf in another window PDF for Effect of Switching Impulse on Piezoelectric-Based Vibration Reduction With Multiple Patches
Topics: Impulse (Physics), Vibration, Switches, Piezoelectric transducers, Circuits, Piezoelectric materials, Blades, Design, Excitation, High cycle fatigue
Proceedings Papers

Multi-Objective Optimization for Piezoelectric-Based Approaches With Applications Toward Bladed Disks

Garrett K. Lopp, Jeffrey L. Kauffman
Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT35A027, June 17–21, 2019
Paper No: GT2019-91861
DOI: https://doi.org/10.1115/GT2019-91861
View Paper titled, Multi-Objective Optimization for Piezoelectric-Based Approaches With Applications Toward Bladed Disks
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Topics: Disks, Pareto optimization, Vibration, Blades, Optimization, Actuators, Algorithms, Aluminum, Geometry, Sensors
Proceedings Papers

An Experimental Study of Resonance Frequency Detuning Applied to Blade Mistuning

Garrett K. Lopp, Jeffrey L. Kauffman
Proc. ASME. GT2018, Volume 7C: Structures and Dynamics, V07CT35A038, June 11–15, 2018
Paper No: GT2018-76834
DOI: https://doi.org/10.1115/GT2018-76834
View Paper titled, An Experimental Study of Resonance Frequency Detuning Applied to Blade Mistuning
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Topics: Blades, Resonance, Vibration, Stiffness, Construction, Damping, Design, Disks, Engines, Excitation
Proceedings Papers

Optimal Placement and Sizing of Piezoelectric Material for Multiple-Mode Vibration Reduction

Christopher R. Kelley, Jeffrey L. Kauffman
Proc. ASME. GT2018, Volume 7C: Structures and Dynamics, V07CT35A041, June 11–15, 2018
Paper No: GT2018-77025
DOI: https://doi.org/10.1115/GT2018-77025
View Paper titled, Optimal Placement and Sizing of Piezoelectric Material for Multiple-Mode Vibration Reduction
Click here to open pdf in another window PDF for Optimal Placement and Sizing of Piezoelectric Material for Multiple-Mode Vibration Reduction
Topics: Piezoelectric materials, Vibration, Blades, Damping, Failure, High cycle fatigue, Mechanical properties, Smart materials, Transients (Dynamics), Turbine blades
Journal Articles

Vibration Reduction of Mistuned Bladed Disks Via Piezoelectric-Based Resonance Frequency Detuning

Garrett K. Lopp, Jeffrey L. Kauffman
Journal: Journal of Vibration and Acoustics
Article Type: Research-Article
J. Vib. Acoust. October 2018, 140(5): 051007.
Paper No: VIB-17-1300
DOI: https://doi.org/10.1115/1.4039540
Published Online: April 18, 2018
View Article titled, Vibration Reduction of Mistuned Bladed Disks Via Piezoelectric-Based Resonance Frequency Detuning
Click here to open pdf in another window PDF for Vibration Reduction of Mistuned Bladed Disks Via Piezoelectric-Based Resonance Frequency Detuning
Topics: Blades, Circuits, Damping, Equations of motion, Excitation, Resonance, Stiffness, Switches, Vibration, Turbomachinery
Proceedings Papers

Including Vibration Characteristics Within Compressive Sensing Formulations for Structural Monitoring of Beams

Vaahini Ganesan, Tuhin K. Das, Jeffrey L. Kauffman, Nazanin Rahnavard
Proc. ASME. DSCC2017, Volume 3: Vibration in Mechanical Systems; Modeling and Validation; Dynamic Systems and Control Education; Vibrations and Control of Systems; Modeling and Estimation for Vehicle Safety and Integrity; Modeling and Control of IC Engines and Aftertreatment Systems; Unmanned Aerial Vehicles (UAVs) and Their Applications; Dynamics and Control of Renewable Energy Systems; Energy Harvesting; Control of Smart Buildings and Microgrids; Energy Systems, V003T32A008, October 11–13, 2017
Paper No: DSCC2017-5213
DOI: https://doi.org/10.1115/DSCC2017-5213
View Paper titled, Including Vibration Characteristics Within Compressive Sensing Formulations for Structural Monitoring of Beams
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Topics: Vibration, Boundary-value problems, Sensors, Algorithms, Damping, Deflection, Instrumentation, Mechanical structures, Noise (Sound), Shapes
Proceedings Papers

Academic Blade Geometries for Baseline Comparisons of Industry-Specific Forced Response Predictions

James H. Little, II, Jeffrey L. Kauffman, Matthias Huels
Proc. ASME. GT2017, Volume 7B: Structures and Dynamics, V07BT35A028, June 26–30, 2017
Paper No: GT2017-64877
DOI: https://doi.org/10.1115/GT2017-64877
View Paper titled, Academic Blade Geometries for Baseline Comparisons of Industry-Specific Forced Response Predictions
Click here to open pdf in another window PDF for Academic Blade Geometries for Baseline Comparisons of Industry-Specific Forced Response Predictions
Topics: Blades, Dampers, Simulation, Vibration, Friction, Turbine blades, Turbomachinery, Contact dynamics, Damping, Design
Proceedings Papers

Resonance Frequency Detuning With Application Towards Blade Mistuning

Garrett K. Lopp, Jeffrey L. Kauffman
Proc. ASME. GT2017, Volume 7B: Structures and Dynamics, V07BT35A030, June 26–30, 2017
Paper No: GT2017-64973
DOI: https://doi.org/10.1115/GT2017-64973
View Paper titled, Resonance Frequency Detuning With Application Towards Blade Mistuning
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Topics: Blades, Resonance, Vibration, Damping, Excitation, Circuits, Statistical analysis, Stiffness, Turbomachinery
Proceedings Papers

Adaptive Switch Timing Control Law for Optimal Displacement Reduction via SSDI

Christopher R. Kelley, Jeffrey L. Kauffman
Proc. ASME. SMASIS2016, Volume 2: Modeling, Simulation and Control; Bio-Inspired Smart Materials and Systems; Energy Harvesting, V002T03A023, September 28–30, 2016
Paper No: SMASIS2016-9259
DOI: https://doi.org/10.1115/SMASIS2016-9259
View Paper titled, Adaptive Switch Timing Control Law for Optimal Displacement Reduction via SSDI
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Topics: Displacement, Switches, Excitation, Damping, Control equipment, Inductors, Piezoelectric actuators, Resonance, Steady state, Vibration
Proceedings Papers

High-Dimensional Chaos Control Algorithms for Improved Piezoelectric Energy Harvesting Using a Bistable Structure

Daniel Geiyer, Jeffrey L. Kauffman
Proc. ASME. IDETC-CIE2015, Volume 8: 27th Conference on Mechanical Vibration and Noise, V008T13A035, August 2–5, 2015
Paper No: DETC2015-46654
DOI: https://doi.org/10.1115/DETC2015-46654
View Paper titled, High-Dimensional Chaos Control Algorithms for Improved Piezoelectric Energy Harvesting Using a Bistable Structure
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Topics: Chaos, Control algorithms, Energy harvesting, Attractors, Control equipment, Design, Excitation, Manifolds, Resonance, Steady state
Proceedings Papers

Effect of Switch Delays on Piezoelectric-Based Semi-Active Vibration Reduction Techniques

Christopher R. Kelley, Jeffrey L. Kauffman
Proc. ASME. SMASIS2015, Volume 1: Development and Characterization of Multifunctional Materials; Mechanics and Behavior of Active Materials; Modeling, Simulation and Control of Adaptive Systems, V001T03A025, September 21–23, 2015
Paper No: SMASIS2015-9051
DOI: https://doi.org/10.1115/SMASIS2015-9051
View Paper titled, Effect of Switch Delays on Piezoelectric-Based Semi-Active Vibration Reduction Techniques
Click here to open pdf in another window PDF for Effect of Switch Delays on Piezoelectric-Based Semi-Active Vibration Reduction Techniques
Topics: Delays, Switches, Vibration, Damping, Boundary-value problems, Cycles, Design, Inductors, Piezoelectric transducers, Resistors
Journal Articles

Switch Triggers for Optimal Vibration Reduction Via Resonance Frequency Detuning

Garrett K. Lopp, Jeffrey L. Kauffman
Journal: Journal of Vibration and Acoustics
Article Type: Research-Article
J. Vib. Acoust. February 2016, 138(1): 011002.
Paper No: VIB-14-1323
DOI: https://doi.org/10.1115/1.4031517
Published Online: October 15, 2015
View Article titled, Switch Triggers for Optimal Vibration Reduction Via Resonance Frequency Detuning
Click here to open pdf in another window PDF for Switch Triggers for Optimal Vibration Reduction Via Resonance Frequency Detuning
Topics: Blades, Circuits, Damping, Equations of motion, Excitation, Resonance, Stiffness, Switches, Vibration, Piezoelectric materials
Journal Articles

Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials

Daniel Geiyer, Jeffrey L. Kauffman
Journal: Journal of Vibration and Acoustics
Article Type: Research-Article
J. Vib. Acoust. October 2015, 137(5): 051005.
Paper No: VIB-14-1435
DOI: https://doi.org/10.1115/1.4030024
Published Online: October 1, 2015
View Article titled, Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials
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Topics: Attractors, Energy harvesting, Excitation, Piezoelectric materials, Design, Displacement, Trajectories (Physics), Algorithms, Chaos, Oscillations
Proceedings Papers

Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials

Daniel Geiyer, Jeffrey L. Kauffman
Proc. ASME. SMASIS2014, Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bioinspired Smart Materials and Systems; Energy Harvesting, V002T07A003, September 8–10, 2014
Paper No: SMASIS2014-7425
DOI: https://doi.org/10.1115/SMASIS2014-7425
View Paper titled, Chaotification as a Means of Broadband Energy Harvesting With Piezoelectric Materials
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Topics: Energy harvesting, Piezoelectric materials, Chaos, Excitation, Attractors, Control equipment, Sensors, Vibration
Proceedings Papers

Switch Triggers for Optimal Vibration Reduction via Resonance Frequency Detuning

Garrett K. Lopp, Jeffrey L. Kauffman
Proc. ASME. GT2014, Volume 7A: Structures and Dynamics, V07AT34A007, June 16–20, 2014
Paper No: GT2014-27263
DOI: https://doi.org/10.1115/GT2014-27263
View Paper titled, Switch Triggers for Optimal Vibration Reduction via Resonance Frequency Detuning
Click here to open pdf in another window PDF for Switch Triggers for Optimal Vibration Reduction via Resonance Frequency Detuning
Topics: Resonance, Switches, Vibration, Stiffness, Damping, Degrees of freedom, Displacement, Dynamics (Mechanics), Equations of motion, Excitation