WDRT Documentation and Users Guide


The WEC Design Response Toolbox (WDRT) was developed by Sandia National Laboratories and the National Renewable Energy Laboratory (NREL) to provide extreme response and fatigue analysis tools, specifically for design analysis of ocean structures such as wave energy converters (WECs). The environmental characterization module of WDRT is based on earlier work on environmental contours: Extreme Sea State Contour Code


The WDRT contains a number of code modules to assist in the major processes of WEC survival design analysis:

  • environmental characterization - metocean environmental analysis and statistics.

  • short term extremes - analysis of short-term (sea-state specific) extreme responses

  • long term extremes - analysis of long-term (design life) extreme responses

  • fatigue - fatigue analysis

  • most-likely extreme response (MLER) - focused-wave construction for efficient high-fidelity modeling


  • Ryan Coe, Sandia National Laboratories

  • Carlos Michelen, Sandia National Laboratories

  • Aubrey Eckert, Sandia National Laboratories

  • Nevin Martin, Sandia National Laboratories

  • Vince Neary, Sandia National Laboratories

  • Annie Dallman, Sandia National Laboratories

  • Jennifer van Rij, National Renewable Energy Laboratory

  • Yi-Hsiang Yu, National Renewable Energy Laboratory

  • Eliot Quon, National Renewable Energy Laboratory

  • Lance Manuel, University of Texas at Austin

  • Phong Nguyen, University of Texas at Austin

  • Jarred Canning, University of New Mexico

  • Tyler Esterly, University of New Mexico

  • Bibiana Seng, University of New Mexico

  • Zacharia Stuart, University of New Mexico