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WEC-Sim (Wave Energy Converter SIMulator) is an open-source wave energy converter (WEC) simulation tool. The code is developed in MATLAB/SIMULINK using the multi-body dynamics solver Simscape Multibody. WEC-Sim has the ability to model devices that are comprised of rigid bodies, power-take-off systems, and mooring systems. Simulations are performed in the time-domain by solving the governing WEC equations of motion in 6 degrees-of-freedom. The WEC-Sim project is funded by the U.S. Department of Energy’s Water Power Technologies Office and the code development effort is a collaboration between the National Renewable Energy Laboratory (NREL) and Sandia National Laboratories (Sandia).

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WEC-Sim Webinars

The WEC-Sim development team from Sandia National Labs and the National Renewable Energy Laboratory (NREL)  will be hosting a series of advanced features webinars. All webinars will be recorded and posted on the WEC-Sim website.

  • April 18, 2017 the 1st webinar of the WEC-Sim series was hosted by the WEC-Sim development team on bemio and multiple case runs.
  • May 24, 2017 the 2nd webinar of the WEC-Sim series was hosted by the WEC-Sim development team on non-linear hydrodynamics, non-hydro bodies, and body-to-body interactions.
  • June 13, 2017 the 3rd webinar of the WEC-Sim series was hosted by the WEC-Sim development team on pto applications.
  • July 18, 2017 the 4th webinar of the WEC-Sim series was hosted by the WEC-Sim development team on mooring and visualization.
  • August 17, 2017 the WEC-Sim development team hosted an online training course for WEC-Sim users and developers.

Project Leads

Developers and Contributors

  • Michael Lawson (NREL)
  • Jennifer Van Rij (NREL)
  • Carlos Michelen (Virginia Tech)
  • Nathan Tom (NREL)
  • Ratanak So (Oregon State University)
  • Matt Hall (University of Prince Edward Island)
  • Adam Nelessen (Georgia Tech)
  • Sam Kanner (University of California at Berkeley)
  • Chris McComb (Carnegie Mellon University)
  1. Y. Yu, M. Lawson, K. Ruehl, and C. Michelen, “Development and Demonstration of the WEC-Sim Wave Energy Converter Simulation Tool,” in Proceedings of the 2nd Marine Energy Technology Symposium, Seattle, WA, 2014.
  2. Y. Yu, Y. Li, K. Hallett, and C. Hotimsky, “Design and Analysis for a Floating Oscillating Surge Wave Energy Converter,” in Proceedings of OMAE 2014, San Francisco, CA, 2014.
  3. M. Lawson, Y. Yu, A. Nelessen, K. Ruehl, and C. Michelen, “Implementing Nonlinear Buoyancy and Excitation Forces in the WEC-Sim Wave Energy Converter Modeling Tool,” in Proceedings of OMAE 2014, San Francisco, CA, 2014.
  4. K. Ruehl, C. Michelen, S. Kanner, M. Lawson, and Y. Yu, “Preliminary Verification and Validation of WEC-Sim, an Open-Source Wave Energy Converter Design Tool,” in Proceedings of OMAE 2014, San Francisco, CA, 2014.
  5. M. Lawson, Y.-H. Yu, K. Ruehl, and C. Michelen, “ Improving and Validating the WEC-Sim Wave Energy Converter Code,” in Proceedings of the 3rd Marine Energy Technology Symposium, DC, 2015.
  6. N. Tom, M. Lawson, and Y. Yu, “Demonstration of the Recent Additions in Modeling Capabilities for the WEC-Sim Wave Energy Converter Design Tool,” in Proceedings of OMAE 2015, St. John’s, Newfoundland, Canada, 2015.
  7. R. So, A. Simmons, T. Brekken, K. Ruehl, and C. Michelen, “Development of PTO-SIM: A Power Performance Module for the Open-Souse Wave Energy Converter Code WEC-SIM,” in Proceedings of OMAE 2015, St. John’s, Newfoundland, Canada, 2015.
  8. M. Lawson, B. Garzon, F. Wendt, Y. Yu, and C. Michelen, “COER Hydrodynamics Modeling Competition: Modeling the Dynamic Response of a Floating Body Using the WEC-SIM and FAST Simulation Tools,” in Proceedings of OMAE 2015, St. John’s, Newfoundland, Canada, 2015.
  9. N. Tom, M. Lawson, and Y. Yu, “Recent Additions in the Modeling Capabilities for the WEC-Sim-v1.1 Wave Energy Converter Design Tool,” in Proceedings of ISOPE 2015, Kona, HI, 2015.
  10. R. So, S. Casey, S. Kanner, A. Simmons, and Brekken, T. K. A., “ PTO-Sim: Development of a Power Take Off Modeling Tool for Ocean Wave Energy Conversion,” in Proceedings of IEEE PES, 2015.
  11. A. Simmons, T. Brekken, P. Lomonaco, and C. Michelen, “ Creating a Dynamometer for Experimental Validation of Power Take-Off Forces on a Wave Energy Converter,” in Proceedings of SusTech, 2015.
  12. A. Combourieu, M. Lawson, A. Babarit, K. Ruehl, A. Roy, R. Costello, P. L. Weywada, and H. Bailey, “WEC3: Wave Energy Converters modeling Code Comparison project,” in Proceedings of EWTEC 2015, Nantes, France, 2015.
  13. B. Bosma, K. Ruehl, A. Simmons, B. Gunawan, P. Lomonaco, and C. Kelley, “WEC-Sim Phase 1 Validation Testing – Experimental Setup and Initial Results,” in Proceedings of OMAE 2016, Busan, South Korea, 2016.
  14. K. Ruehl, C. Michelen, B. Bosma, and Y.-H. Yu, “WEC-Sim Phase 1 Validation Testing – Numerical Modeling of Experiments,” in Proceedings of OMAE 2016, Busan, South Korea, 2016.
  15. Sirnivas S., Yu Y.-H., Hall M., and Bosma B., 2016, “Coupled Mooring Analyses for the WEC-Sim Wave Energy Converter Design Tool,” 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE, Busan, South Korea.
  16. Quon E., Platt A., Yu Y., and Lawson M., 2016, “Application of the Most Likely Extreme Response Method for Wave Energy Converters,” 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE, ed., OMAE, Busan, South Korea.