A generic framework for reliability assessment of offshore wind turbine monopiles

L. Wang, A. Kolios

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

In this work, a generic framework for reliability assessment of OWT (Offshore Wind Turbine) monopiles is developed. The framework starts with defining limit states, and four types of limit states are considered, i.e. ultimate, fatigue, deflection and buckling. A 3D (Three-Dimensional) parametric FEA (Finite Element Analysis) model of OWT monopiles is developed, taking account of soilsolid interaction and stochastic variables (i.e. soil properties, wind, wave and current loads). Multivariate regression is used to post-process the results of stochastic FEA simulations to derive limit-state performance functions expressed in terms of stochastic variables. Having obtained the performance functions, the FORM (First Order Reliability Method) is used to calculate the reliability index for each limit state. The proposed framework is applied to a 30 m-length OWT monopile to assess its reliability. The results indicate that the fatigue reliability is dominant in the design of OWT monopiles.

Original languageEnglish
Title of host publicationProgress in the Analysis and Design of Marine Structures
Subtitle of host publicationProceedings of the 6th International Conference on Marine Structures, MARSTRUCT 2017
EditorsCarlos Guedes Soares, Y. Garbatov
Place of PublicationLeiden
Pages931-938
Number of pages8
Edition1st
DOIs
Publication statusPublished - 24 Apr 2017
Event6th International Conference on Marine Structures, MARSTRUCT 2017 - Lisbon, Portugal
Duration: 8 May 201710 May 2017

Conference

Conference6th International Conference on Marine Structures, MARSTRUCT 2017
CountryPortugal
CityLisbon
Period8/05/1710/05/17

Keywords

  • reliability assessment
  • offshore wind turbine monopiles
  • finite element analysis

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  • Cite this

    Wang, L., & Kolios, A. (2017). A generic framework for reliability assessment of offshore wind turbine monopiles. In C. G. Soares, & Y. Garbatov (Eds.), Progress in the Analysis and Design of Marine Structures : Proceedings of the 6th International Conference on Marine Structures, MARSTRUCT 2017 (1st ed., pp. 931-938). https://doi.org/10.1201/9781315157368-105