Development and Verification of the Soil-Pile Interaction Extension for SubDyn

Rick Damiani, Fabian Wendt

Research output: NRELPoster


SubDyn is the substructure structural-dynamics module for the aero-hydro-servo-elastic tool FAST v8. SubDyn uses a finite-element model (FEM) to simulate complex multimember lattice structures connected to conventional turbines and towers, and it can make use of the Craig-Bampton model reduction. Here we describe the newly added capability to handle soil-pile stiffness and compare results for monopile and jacket-based offshore wind turbines as obtained with FAST v8, SACS, and EDP (the latter two are modeling software packages commonly used in the offshore oil and gas industry). The level of agreement in terms of modal properties and loads for the entire offshore wind turbine components is excellent, thus allowing SubDyn and FAST v8 to accurately simulate offshore wind turbines on fixed-bottom structures and accounting for the effect of soil dynamics, thus reducing risk to the project.
Original languageAmerican English
StatePublished - 2017

Publication series

NamePresented at the AWEA Offshore WINDPOWER 2017, 24-25 October 2017, New York City, New York

NREL Publication Number

  • NREL/PO-5000-70155


  • analysis
  • FAST
  • model verification
  • offshore
  • soil-pile interaction
  • SubDyn
  • wind energy
  • wind turbine


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