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Proceedings Papers

Power Take-Off Design Study for a Small-Scale Oscillating Surge Wave Energy Converter for Powering the Blue Economy Applications

Jackson Wills, Nathan Tom, Senu Sirnivas
Proc. ASME. IMECE2023, Volume 7: Energy, V007T08A066, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-112259
https://doi.org/10.1115/IMECE2023-112259
View Paper titled, Power Take-Off Design Study for a Small-Scale Oscillating Surge Wave Energy Converter for Powering the Blue Economy Applications
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Topics: Design, Economics , Energy conversion, Oscillations, Surges, Wave energy converters, Architecture, Modeling, Renewable energy, Simulation
Proceedings Papers

New Developments and Capabilities Within WEC-Sim

Nathan Tom, Kelley Ruehl, Adam Keester, Dominic Forbush, David Ogden, Jorge Leon, Salman Husain, Jeff Grasberger, Mathew B. R. Topper, Yi-Hsiang Yu
Proc. ASME. OMAE2023, Volume 8: Ocean Renewable Energy, V008T09A076, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-105030
https://doi.org/10.1115/OMAE2023-105030
View Paper titled, New Developments and Capabilities Within WEC-Sim
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Topics: Arches, Boundary element methods, Cables, Computer software, Diffraction, Dynamics (Mechanics), Electric power generation, Energy generation, Floating bodies, Flow (Dynamics)
Proceedings Papers

Design of a Two-Body Wave Energy Converter Featuring Controllable Geometry

Nathan Tom, David Ogden, Michaela Byrne
Proc. ASME. OMAE2023, Volume 8: Ocean Renewable Energy, V008T09A075, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-105020
https://doi.org/10.1115/OMAE2023-105020
View Paper titled, Design of a Two-Body Wave Energy Converter Featuring Controllable Geometry
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Topics: Design, Geometry, Wave energy converters, Seas, Stress, Testing, Wave energy, Waves, Absorption, Actuators
Proceedings Papers

Investigation of Theoretical Solutions to a Bottom-Raised Oscillating Surge Wave Energy Converter (OSWEC) Through Experimental and Parametric Studies

Nhu Nguyen, Jacob Davis, Krish Thiagarajan, Nathan Tom, Salman Husain
Proc. ASME. OMAE2023, Volume 8: Ocean Renewable Energy, V008T09A082, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-106657
https://doi.org/10.1115/OMAE2023-106657
View Paper titled, Investigation of Theoretical Solutions to a Bottom-Raised Oscillating Surge Wave Energy Converter (OSWEC) Through Experimental and Parametric Studies
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Topics: Oscillations, Surges, Wave energy converters, Waves, Damping, Hinges, Stress, Excitation, Radiation (Physics), Reflection
Journal Articles

Influence on Structural Loading of a Wave Energy Converter by Controlling Variable-Geometry Components and the Power Take-Off

Salman Husain, Jacob Davis, Nathan Tom, Krish Thiagarajan, Cole Burge, Nhu Nguyen
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. June 2023, 145(3): 030905.
Paper No: OMAE-22-1166
https://doi.org/10.1115/1.4062115
Published Online: April 5, 2023
View Article titled, Influence on Structural Loading of a Wave Energy Converter by Controlling Variable-Geometry Components and the Power Take-Off
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Topics: Damping, Geometry, Stress, Surges, Waves, Wave energy converters
Proceedings Papers

Review of Wave Energy Converter Power Take-Off Systems, Testing Practices, and Evaluation Metrics

Nathan Tom
Proc. ASME. IMECE2022, Volume 6: Energy, V006T08A065, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-94077
https://doi.org/10.1115/IMECE2022-94077
View Paper titled, Review of Wave Energy Converter Power Take-Off Systems, Testing Practices, and Evaluation Metrics
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Topics: Testing, Wave energy converters, Wave energy, Waves, Design, Energy conversion, Stress, Chain, Batteries, Capacitors
Proceedings Papers

Influence on Structural Loading of a Wave Energy Converter by Controlling Variable-Geometry Components and the Power Take-Off

Salman Husain, Jacob Davis, Nathan Tom, Krish Thiagarajan, Cole Burge, Nhu Nguyen
Proc. ASME. OMAE2022, Volume 8: Ocean Renewable Energy, V008T09A087, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-81518
https://doi.org/10.1115/OMAE2022-81518
View Paper titled, Influence on Structural Loading of a Wave Energy Converter by Controlling Variable-Geometry Components and the Power Take-Off
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Topics: Geometry, Wave energy converters, Stress, Waves, Hinges, Design, Damping, Failure, Oceans, Oscillations
Proceedings Papers

Performance Modeling of a Variable-Geometry Oscillating Surge Wave Energy Converter on a Raised Foundation

Cole Burge, Nathan Tom, Krish Thiagarajan, Jacob Davis, Nhu Nguyen
Proc. ASME. OMAE2021, Volume 9: Ocean Renewable Energy, V009T09A010, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-62423
https://doi.org/10.1115/OMAE2021-62423
View Paper titled, Performance Modeling of a Variable-Geometry Oscillating Surge Wave Energy Converter on a Raised Foundation
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Topics: Geometry, Modeling, Oscillations, Surges, Wave energy converters, Pressure, Steel, Wave energy, Additive manufacturing, Concretes
Proceedings Papers

Numerical Model Development of a Variable-Geometry Attenuator Wave Energy Converter

Davy Pardonner, Nathan Tom, Yi Guo
Proc. ASME. OMAE2020, Volume 9: Ocean Renewable Energy, V009T09A031, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-19054
https://doi.org/10.1115/OMAE2020-19054
View Paper titled, Numerical Model Development of a Variable-Geometry Attenuator Wave Energy Converter
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Topics: Computer simulation, Geometry, Wave energy converters, Seas, Cylinders, Design, Energy generation, Steel, Wave energy, Buoyancy
Proceedings Papers

Investigating the Impact of Power-Take-Off System Parameters and Control Law on a Rotational Wave Energy Converter’s Peak-to-Average Power Ratio Reduction

H. Bora Karayaka, Yi-Hsiang Yu, Nathan Tom, Eduard Muljadi
Proc. ASME. OMAE2020, Volume 9: Ocean Renewable Energy, V009T09A029, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18961
https://doi.org/10.1115/OMAE2020-18961
View Paper titled, Investigating the Impact of Power-Take-Off System Parameters and Control Law on a Rotational Wave Energy Converter’s Peak-to-Average Power Ratio Reduction
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Topics: Control algorithms, Engines, Gears, Generators, Geometry, Hardware, Inertia (Mechanics), Mechanical drives, Motors, Resonance
Proceedings Papers

Development and Validation of Passive Yaw in the Open-Source WEC-Sim Code

Dominic D. Forbush, Kelley Ruehl, David Ogden, Jennifer van Rij, Yi-Hsiang Yu, Nathan Tom
Proc. ASME. OMAE2020, Volume 9: Ocean Renewable Energy, V009T09A038, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-19255
https://doi.org/10.1115/OMAE2020-19255
View Paper titled, Development and Validation of Passive Yaw in the Open-Source WEC-Sim Code
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Topics: Yaw, Excitation, Waves, Computation, Boundary element methods, Displacement, Interpolation, Algorithms, Matlab, Modeling
Proceedings Papers

Bichromatic Wave Selection for Validation of the Difference-Frequency Transfer Function for the OC6 Validation Campaign

Nathan Tom, Amy Robertson, Jason Jonkman, Fabian Wendt, Manuela Böhm
Proc. ASME. IOWTC2019, ASME 2019 2nd International Offshore Wind Technical Conference, V001T01A022, November 3–6, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IOWTC2019-7572
https://doi.org/10.1115/IOWTC2019-7572
View Paper titled, Bichromatic Wave Selection for Validation of the Difference-Frequency Transfer Function for the OC6 Validation Campaign
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Topics: Ocean engineering, Transfer functions, Waves, Wind
Proceedings Papers

The Wave Energy Converter Control Competition: Overview

John Ringwood, Francesco Ferri, Nathan Tom, Kelley Ruehl, Nicols Faedo, Giorgio Bacelli, Yi-Hsiang Yu, Ryan G. Coe
Proc. ASME. OMAE2019, Volume 10: Ocean Renewable Energy, V010T09A035, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95216
https://doi.org/10.1115/OMAE2019-95216
View Paper titled, The Wave Energy Converter Control Competition: Overview
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Topics: Control systems, Wave energy converters
Proceedings Papers

Numerical Model Development and Validation for the WECCCOMP Control Competition

Nathan Tom, Kelley Ruehl, Francesco Ferri
Proc. ASME. OMAE2018, Volume 10: Ocean Renewable Energy, V010T09A042, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-78094
https://doi.org/10.1115/OMAE2018-78094
View Paper titled, Numerical Model Development and Validation for the WECCCOMP Control Competition
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Topics: Computer simulation, Control algorithms, Wave energy converters
Proceedings Papers

Numerical Analysis on Hydraulic Power Take-Off for Wave Energy Converter and Power Smoothing Methods

Yi-Hsiang Yu, Nathan Tom, Dale Jenne
Proc. ASME. OMAE2018, Volume 10: Ocean Renewable Energy, V010T09A043, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-78176
https://doi.org/10.1115/OMAE2018-78176
View Paper titled, Numerical Analysis on Hydraulic Power Take-Off for Wave Energy Converter and Power Smoothing Methods
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Topics: Numerical analysis, Smoothing methods, Wave energy converters, Stress, Batteries, Design, Energy storage, Hydrodynamics, Power grids, Pressure
Proceedings Papers

Modeling of a Permanent Magnet Linear Generator for Wave-Energy Conversion

Nathan Tom, Daewoong Son, Valentin Belissen, Ronald W. Yeung
Proc. ASME. OMAE2015, Volume 9: Ocean Renewable Energy, V009T09A024, May 31–June 5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2015-42370
https://doi.org/10.1115/OMAE2015-42370
View Paper titled, Modeling of a Permanent Magnet Linear Generator for Wave-Energy Conversion
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Topics: Generators, Modeling, Permanent magnets, Wave energy, Damping, Circuits, Construction, Electromotive force, Energy conversion, Equations of motion
Proceedings Papers

Demonstration of the Recent Additions in Modeling Capabilities for the WEC-Sim Wave Energy Converter Design Tool

Nathan Tom, Michael Lawson, Yi-Hsiang Yu
Proc. ASME. OMAE2015, Volume 9: Ocean Renewable Energy, V009T09A035, May 31–June 5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2015-42265
https://doi.org/10.1115/OMAE2015-42265
View Paper titled, Demonstration of the Recent Additions in Modeling Capabilities for the WEC-Sim Wave Energy Converter Design Tool
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Topics: Design, Modeling, Wave energy converters, Approximation, Boundary element methods, Damping, Floating bodies, Fluids, Inertia (Mechanics), Matlab
Proceedings Papers

Confirmation of a Nonlinear Model Predictive Control Strategy Applied to a Permanent Magnet Linear Generator for Wave-Energy Conversion

Nathan Tom
Proc. ASME. OMAE2014, Volume 9B: Ocean Renewable Energy, V09BT09A057, June 8–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2014-24711
https://doi.org/10.1115/OMAE2014-24711
View Paper titled, Confirmation of a Nonlinear Model Predictive Control Strategy Applied to a Permanent Magnet Linear Generator for Wave-Energy Conversion
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Topics: Generators, Permanent magnets, Predictive control, Wave energy, Waves, Damping, Electricity (Physics), Engineering simulation, Equations of motion, Floating bodies
Proceedings Papers

A Comparison of Time Domain Methods for Asymmetric Roll Predictions

Robert Seah, Fabien Bigot, Nathan Tom, Dominique Roddier
Proc. ASME. OMAE2014, Volume 7: Ocean Space Utilization; Professor Emeritus J. Randolph Paulling Honoring Symposium on Ocean Technology, V007T12A009, June 8–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2014-23563
https://doi.org/10.1115/OMAE2014-23563
View Paper titled, A Comparison of Time Domain Methods for Asymmetric Roll Predictions
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Topics: Calibration, Damping, Design, Drag (Fluid dynamics), Dynamics (Mechanics), Engineering simulation, Hull, Hydrodynamics, Keel, Mooring
Journal Articles

Nonlinear Model Predictive Control Applied to a Generic Ocean-Wave Energy Extractor

Nathan Tom, Ronald W. Yeung
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research-Article
J. Offshore Mech. Arct. Eng. November 2014, 136(4): 041901.
Paper No: OMAE-13-1027
https://doi.org/10.1115/1.4027651
Published Online: July 31, 2014
View Article titled, Nonlinear Model Predictive Control Applied to a Generic Ocean-Wave Energy Extractor
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Topics: Damping, Waves, Control equipment, Generators, Predictive control