This paper illustrates an approach to the modeling of a point absorbing Wave Energy Converter (WEC) with the intent of analyzing the sensitivity of the system response to variation in the model parameters. Using first principles, the nonlinear equations of motion are formed to describe the heave motion of a 3 body system. A linearized model is developed and used to simulate the system in both the time and frequency domains. The input to the model is a time series displacement and a time series velocity that describes the incident waves. A sensitivity analysis is then performed on the system parameters to show how the characteristics of the heave plate, the component masses, and the mass of the entrained fluid affect the performance of the system. The model is validated by numerically modeling a generation 1 device produced by Oscilla Power Inc., which is compared against experimental data from a field test on Lake Washington. The WEC is designed to provide tension along a series of tethers with connected power take off units. The wave input is specified using frequency spectra measured with a nearby Datawell Waverider MK III buoy during the field testing, from which time domain waves are reconstructed.
Skip Nav Destination
ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
June 8–13, 2014
San Francisco, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4550-9
PROCEEDINGS PAPER
Modeling and Analysis of a Multi Degree of Freedom Point Absorber Wave Energy Converter
Andrew F. Davis,
Andrew F. Davis
University of Washington, Seattle, WA
Search for other works by this author on:
Jim Thomson,
Jim Thomson
University of Washington, Seattle, WA
Search for other works by this author on:
Tim R. Mundon,
Tim R. Mundon
Oscilla Power Inc., Seattle, WA
Search for other works by this author on:
Brian C. Fabien
Brian C. Fabien
University of Washington, Seattle, WA
Search for other works by this author on:
Andrew F. Davis
University of Washington, Seattle, WA
Jim Thomson
University of Washington, Seattle, WA
Tim R. Mundon
Oscilla Power Inc., Seattle, WA
Brian C. Fabien
University of Washington, Seattle, WA
Paper No:
OMAE2014-23475, V08AT06A046; 10 pages
Published Online:
October 1, 2014
Citation
Davis, AF, Thomson, J, Mundon, TR, & Fabien, BC. "Modeling and Analysis of a Multi Degree of Freedom Point Absorber Wave Energy Converter." Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. Volume 8A: Ocean Engineering. San Francisco, California, USA. June 8–13, 2014. V08AT06A046. ASME. https://doi.org/10.1115/OMAE2014-23475
Download citation file:
43
Views
0
Citations
Related Proceedings Papers
Related Articles
Modeling and Identification of a Nonlinear SDOF Moored Structure, Part 2—Comparisons and Sensitivity Study
J. Offshore Mech. Arct. Eng (May,2004)
Revisiting Theoretical Limits for One Degree-of-Freedom Wave Energy Converters
J. Energy Resour. Technol (September,2021)
Nonlinear Model for Sub- and Superharmonic Motions of a MDOF Moored Structure, Part 2—Sensitivity Analysis and Comparison
J. Offshore Mech. Arct. Eng (November,2005)
Related Chapters
Pipeline Integrity and Security
Continuing and Changing Priorities of the ASME Boiler & Pressure Vessel Codes and Standards
Time Series Modeling on Web Analytics
International Conference on Computer Engineering and Technology, 3rd (ICCET 2011)
A Smart Sampling Strategy for One-at-a-Time Sensitivity Experiments (PSAM-0360)
Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)