Print Email Facebook Twitter Geotechnical aspects of offshore wind turbine dynamics from 3D non-linear soil-structure simulations Title Geotechnical aspects of offshore wind turbine dynamics from 3D non-linear soil-structure simulations Author Kementzetzidis, E. (TU Delft Offshore Engineering) Corciulo, Simone (RINA Consulting S.p.A.) Versteijlen, Willem G. (Siemens Gamesa Renewable Energy) Pisano, F. (TU Delft Geo-engineering) Date 2019 Abstract The development of the offshore wind industry is motivating substantial research efforts worldwide, where offshore wind turbines (OWTs) of increasing size are being installed in deeper water depths. Foundation design is a major factor affecting the structural performance of OWTs, with most installations founded to date on large-diameter monopiles. This work promotes advanced 3D finite element (FE) modelling for the dynamic analysis of OWT-monopile-soil systems. A detailed FE model of a state-of-the-art 8 MW OWT is analysed by accounting for dynamic soil-monopile interaction in presence of pore pressure effects. For this purpose, the critical-state, bounding surface SANISAND model is adopted to reproduce the hydro-mechanical cyclic response of the sand deposit. The response to realistic environmental loading histories (10 min duration) are simulated, then followed by numerical rotor-stop tests for global damping estimation. While linking to existing literature, all FE results are critically inspected to gain insight relevant to geotechnical design. The modelling tools adopted (i) support the robustness of 'soft-stiff’ foundation design with respect to natural frequency shifts, even during severe storm events; (ii) provide values of foundation damping in line with field measurements; (iii) suggest that pore pressure effects might more likely affect soil-monopile interaction under weak-to-moderate environmental loading. Subject Cyclic loadingDampingHydro-mechanical couplingMonopileNatural frequencyOffshore wind turbineSand plasticity To reference this document use: http://resolver.tudelft.nl/uuid:25942322-1130-47ce-bb44-dfa7a15c00a0 DOI https://doi.org/10.1016/j.soildyn.2019.01.037 Embargo date 2021-02-14 ISSN 0267-7261 Source Soil Dynamics and Earthquake Engineering, 120, 181-199 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2019 E. Kementzetzidis, Simone Corciulo, Willem G. Versteijlen, F. Pisano Files PDF Kementzetzidis_etal_clean.pdf 24.66 MB Close viewer /islandora/object/uuid:25942322-1130-47ce-bb44-dfa7a15c00a0/datastream/OBJ/view