Bending moment profiles as indicators for the lateral stiffness of offshore wind turbines
Bending moment profiles as indicators for the lateral stiffness of offshore wind turbines
The offshore wind energy sector is experiencing rapid growth, as most of the countries are aiming for a decarbonization of their economy by 2050. Wind turbines located in the Belgian North Sea have been monitored for several years and can serve as a basis for deeper investigation of their in-situ behaviour compared to design expectations.
This paper presents the results of bending moments back analyses on two monitored wind turbine monopiles located in the Belgian North Sea. Two site-specific ground models are established for each wind turbine location. A 3D FEM ABAQUS model is established for each wind turbine, in which the soil is modelled using the hypoplastic constitutive models for sand and clay, which were calibrated using advanced laboratory testing results as well as in-situ test data. The monopiles are subjected to quasi-static operational loads that were derived from the monitoring data. First, the bending moments are computed and compared to the monitored ones for each wind turbine. The bending moments are then linked to the lateral stiffness of each wind turbine. Results are discussed and the possible effect of scour protection is highlighted.
Anis Kheffache; B. Stuyts; Carlos Sastre Jurado; Christof Devriendt
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
8 - Monopile design to lateral monotonic loads
https://doi.org/10.53243/ISFOG2025-589
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