Model Development and Loads Analysis of a Wind Turbine on a Floating Offshore Tension Leg Platform

Research output: Contribution to conferencePaper


This report presents results of the analysis of a 5-MW wind turbine located on a floating offshore tension leg platform (TLP) that was conducted using the fully coupled time-domain aero-hydro-servo-elastic design code FAST with AeroDyn and HydroDyn. Models in this code are of greater fidelity than most of the models that have been used to analyze floating turbines in the past--which have neglected important hydrodynamic and mooring system effects. The report provides a description of the development process of a TLP model, which is a modified version of a Massachusetts Institute of Technology design derived from a parametric linear frequency-domain optimization process. An extensive loads and stability analysis for ultimate and fatigue loads according to the procedure of the International Electrotechnical Commission offshore wind turbine design standard was performed with the verified TLP model. Response statistics, extreme event tables, fatigue lifetimes, and selected time histories of design-driving extreme events are analyzed and presented. Loads for the wind turbine on the TLP are compared to those of an equivalent land-based turbine in terms of load ratios. Major instabilities for the TLP are identified and described.
Original languageAmerican English
Number of pages17
StatePublished - 2010
Event2009 European Offshore Wind Conference and Exhibition - Stockholm, Sweden
Duration: 14 Sep 200916 Sep 2009


Conference2009 European Offshore Wind Conference and Exhibition
CityStockholm, Sweden

NREL Publication Number

  • NREL/CP-500-46725


  • loads analysis
  • model development
  • tension leg platform
  • wind turbine floating platform


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