The aim is to ensure more reliable analysis and testing methods through advancement of modelling and experimental techniques for bottom fixed offshore wind turbines. The improved models and procedures will ensure more reliable design analysis and testing methods for large-diameter monopiles. Water depths to be considered are in the range 20-50 m. To achieve this goal, the following secondary objectives are set:
- Improve analysis tools and experimental techniques for wave loads on monopiles in shallow and intermediate water.
- Increase knowledge of the interaction between nonlinear loads from waves and nonlinear soil response for large-diameter monopiles.
- Develop better procedures to establish load-history-consistent soil stiffness and soil damping, by taking complex drainage condition into account.
- Improve understanding of long-term responses from fully coupled geo-aero-hydro-elastic analysis.
- Evaluate and propose improvements to existing design standards and practice.
The WAS-XL project is led by SINTEF Ocean, and NGI leads WP2, one of the four work packages of WAS-XL.
- WP1: Modelling of nonlinear wave kinematics and loads
- WP2: Interaction between irregular cyclic loads and nonlinear soil response
- WP3: Long-term structural response methodologies
- WP4: Experimental validation
