Abstract
Monopiles are the most common foundation system for supporting Offshore Wind Turbines (OWT’s), accounting for more than 80% of all OWT substructures installed in Europe to date [1]. Significant reductions in the cost of developing OWTs have been realized over the past few years, to the point where offshore wind can now be developed subsidy free in favorable locations. Optimizing the engineering design of these structures has played a key role in ensuring these cost reductions are possible. The largest uncertainty with respect to modelling the dynamic response of an OWT often relates to the geotechnical design. This paper examines the influence of soil-structure interaction on the dynamic response of an OWT structure. The below ground pile-soil behavior was modelled using (i) a conventional DNV (De Norske Veritas) ‘p-y’ approach and (ii) an advanced in-situ calibrated 3D FE geotechnical design approach. The results for the soil-structure interaction were inputted into a separate dynamic wind turbine model and the dynamic response using the two separate SSI approaches were compared.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Wind Europe: Offshore wind in Europe - Key Statistics and Trends 2017. Wind Europe (2017). https://windeurope.org/wp-content/uploads/files/about-wind/statistics/WindEurope-Annual-Offshore-Statistics-2017.pdf
DNV.GL: DNVGL-ST-0126: Support structures for wind turbines, Dnv Gl As, no, April 2016
Winkler, E.: Theory of Elasticity and Strength. Dominicus, Prague (1867)
Murphy, G., Igoe, D., Doherty, P., Gavin, K.G.: 3D FEM approach for laterally loaded monopile design, Comput. Geotech. 100, 76–83 (2018)
Byrne, B.W., et al.: New design methods for large diameter piles under lateral loading for offshore wind applications. In: Frontiers in Offshore Geotechnics III - Proceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015 (2015)
Byrne, B.W., et al.: Field testing of large diameter piles under lateral loading for offshore wind applications. In: Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE, vol. 3 (2015)
Byrne, B., et al.: PISA: new design methods for offshore wind turbine monopiles (Keynote). In: International Conference on Offshore Site Investigations and Geotechnics (2017)
Jonkman, J., Butterfield, S., Musial, W., Scott, G.: Definition of a 5-MW Reference Wind Turbine for Offshore System Development, no. February 2009
Schanz, T., Vermeer, A., Bonnier, P.: The hardening soil model: formulation and verification. In: Beyond 2000 Computers Geotechnics 10 years PLAXIS – Proceedings of International Symposium beyond 2000 Computers Geotechnics, Amsterdam, Netherlands 1820 March 1999, p. 281 (1999)
Prendergast, L.J., Gavin, K., Doherty, P.: An investigation into the effect of scour on the natural frequency of an offshore wind turbine. Ocean Eng. 101, 1–11 (2015)
Prendergast, L.J., Reale, C., Gavin, K.: Probabilistic examination of the change in eigenfrequencies of an offshore wind turbine under progressive scour incorporating soil spatial variability. Mar. Struct. 57, 87–104 (2018)
Dutta, S.C., Roy, R.: A critical review on idealization and modeling for interaction among soil–foundation–structure system. Comput. Struct. 80, 1579–1594 (2002)
Clough, R.W., Penzien, J.: Dynamics of structures (1993)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Switzerland AG
About this paper
Cite this paper
Igoe, D., Prendergast, L.J., Fitzgerald, B., Sarkar, S. (2018). Numerical Modelling of a Monopile for Estimating the Natural Frequency of an Offshore Wind Turbine. In: Wu, W., Yu, HS. (eds) Proceedings of China-Europe Conference on Geotechnical Engineering. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-319-97112-4_76
Download citation
DOI: https://doi.org/10.1007/978-3-319-97112-4_76
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-97111-7
Online ISBN: 978-3-319-97112-4
eBook Packages: EngineeringEngineering (R0)