Substructure Flexibility and Member-Level Load Capabilities for Floating Offshore Wind Turbines in OpenFAST: Paper No. IOWTC2019-7566

Jason Jonkman, Emmanuel Branlard, Matthew Hall, Amy Robertson, Greg Hayman, Rick Damiani

Research output: Contribution to conferencePaper

Abstract

OpenFAST is an open-source, physics-based engineering tool applicable to the load analysis of land-based and offshore wind turbines, including floating offshore wind turbines. The substructure for a floating wind turbine has historically been modeled in OpenFAST as a rigid body with hydrodynamic loads lumped at a point, which enabled the tool to predict the global response of the floating substructure but not the structural loads within its individual members. This limitation is an impediment to designing floating substructures - especially newer designs that are more streamlined, flexible, and cost-effective. This paper presents the development plan of new capabilities in OpenFAST to model floating substructure flexibility and member-level loads, including the functional requirements and modeling approaches needed to understand and apply them correctly.
Original languageAmerican English
Number of pages8
DOIs
StatePublished - 2019
EventASME 2019 2nd International Offshore Wind Technical Conference - St. Julian's, Malta
Duration: 3 Nov 20196 Nov 2019

Conference

ConferenceASME 2019 2nd International Offshore Wind Technical Conference
CitySt. Julian's, Malta
Period3/11/196/11/19

Bibliographical note

See NREL/CP-5000-74380 for preprint

NREL Publication Number

  • NREL/CP-5000-76105

Keywords

  • aero-hydro-servo-elastics
  • floating offshore wind turbine
  • functional requirements
  • member-level loads
  • OpenFAST
  • substructure flexibility

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