Research project foundation structural health monitoring (FSHM)
When it comes to offshore foundations, dynamic behaviour, scouring, corrosion, reduction in grout and foundation integrity over time, can be problematic. OWI-lab has a mutual R&D partnership with Belwind to perform 'foundation asset monitoring', also named SHM (Structural Health Monitoring) in civil engineering . The Belwind wind farm is located in the North Sea on the Bligh Bank, 46 km off the Belgian coast and consists of 55 Vestas V90-3MW wind turbines placed on monopile foundations. OWI-Lab has been monitoring one of these turbines since 2011 and theirefore has access to unique datasets and knowledge about structural monitoring.
The installed foundation monitoring system evaluates several parameters:
- Loads and displacements in the grouted connection
- Vibrations levels on tower and foundation in multiple directions
- Resonance frequencies and damping values of the offshore structure by the use of OMA-techniques
- Oxygen levels and corrosion rates inside the monopile foundation (in partnership with Zensor)
Link to news articles:
- Belwind wind farm and OWI Lab working together on innovative monitoring systems for offshore wind turbines foundations
- State-of-the-art and new developments in the field of structural health monitoring
Link to conference posters:
- BruWind 2012 conference: "Continuous Operational Modal Analysis (OMA) of an Offshore Wind Turbine"
- EWEA Offshore 2013 conference: "Foundation monitoring systems for optimized O&M and lifetime assessment"
- EWEA 2014 conference: "Foundation monitoring systems: analysis of 2 years of monitoring at the North Sea"
- Design verification of offshore wind turbines for foundation optimization and scour monitoring
- Damping of an offshore wind turbine: classification and comparison between simulations and measurements
- Monitoring of offshore turbines for design and O&M: an overview of the activities of OWI-Lab