IEA Wind Task 30 (OC6): Offshore Code Comparison Collaboration, Continued with Correlation and unCertainty

The project covers DTU Wind Energy’s participation in the OC6 project that is a part of the IEA
Wind Task 30. In the OC6 project, a large number of international participants will compare
numerical calculations with measurement data related to offshore wind structures. Here the aim is
to reduce the uncertainty of the models, de-risk their application and thus lead to more costeffective
designs. The project is a continuation of the OC3, OC4 and OC5 projects, where DTU has
had a key role and is known for its strong position in aero-elastic models. This project consists of
four elements, which are nonlinear low-frequency wave forcing of floating wind turbines (WP1);
soil-structure interaction for monopiles (WP2); unsteady aerodynamics of floating wind turbines
(WP3); and analysis of viscous forcing and damping for floating platforms (WP4). DTU has a
special role in WP4, where DTU facilitates the use of data from a DHI scale-model experiment for
the Danish TetraSpar. The project will strengthen DTU’s HAWC2 aero-hydro-servo-elastic
HAWC2 code through validation with complex model experiments of offshore wind turbines;
increase contact with international actors in the field; and lead the way for more accurate models in
the Danish offshore wind energy sector.