Role of advanced soil modelling in the dynamic analysis of offshore wind turbines

Federico Pisano, Simone Corciulo, Omar Zanoli

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

1 Citation (Scopus)
48 Downloads (Pure)

Abstract

The increasing relevance of offshore wind in the energy mix motivates continual research efforts for the optimisation of foundation systems. Currently, monopiles are still the most common foundations for offshore wind turbines (OWTs), due to their simplicity and the low costs for production/assembly. However, the modern trends towards larger OWTs and water depths pose new
geotechnical challenges in the design of more cumbersome and expensive monopiles. In this work, the potential of 3D finite element (FE) modelling for OWT applications is illustrated. The dynamic response of a soil-monopile-OWT system is numerically simulated by accounting for (i) dynamic hydro-mechanical (HM) coupling in the soil and (ii) cyclic plasticity modelling. In particular, the UCSD08 sand model developed by Yang and Elgamal (2008) has been adopted and calibrated against laboratory test results on medium dense sand. FE results are presented to highlight the combined influence of wind/wave loading and soil non-linearity on the dynamic OWT performance (and specifically on the main natural frequency). The results presented support the beneficial role that 3D
FE modelling may play in the improvement of existing design methods.
Original languageEnglish
Title of host publicationProceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 2017
Number of pages4
Publication statusPublished - 2017
Event19th International Conference on Soil Mechanics and Geotechnical Engineering - Seoul, Korea, Republic of
Duration: 17 Sep 201722 Sep 2017
Conference number: 19
https://www.icsmge2017.org/

Conference

Conference19th International Conference on Soil Mechanics and Geotechnical Engineering
Abbreviated titleICSMGE 2017
CountryKorea, Republic of
CitySeoul
Period17/09/1722/09/17
Internet address

Keywords

  • offshore wind turbine
  • monopile
  • sand
  • cyclic plasticity modelling
  • hydro-mechanical coupling
  • dynamic analysis

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