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Foundation structural health monitoring of an offshore wind turbinea full-scale case study
Weijtjens, W.; Verbelen, T.; De Sitter, G.; Devriendt, C. (2016). Foundation structural health monitoring of an offshore wind turbinea full-scale case study. Structural Health Monitoring 15(4): 389-402. https://hdl.handle.net/10.1177/1475921715586624
In: Structural Health Monitoring. Sage: London. ISSN 1475-9217; e-ISSN 1741-3168, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoord
    Marien
Author keywords
    Foundation monitoring; offshore wind turbine; operational modalanalysis; data normalization; operational and environmental variability

Auteurs  Top 
  • Weijtjens, W., meer
  • Verbelen, T., meer
  • De Sitter, G., meer
  • Devriendt, C., meer

Abstract
    In this contribution, first, the results in the development of a structural health monitoring approach for the foundations of an offshore wind turbine based on its resonance frequencies will be presented. Key problems are the operational and environmental variability of the resonance frequencies of the turbine that potentially conceal any structural change. This article uses a (non-)linear regression model to compensate for the environmental variations. An operational case-by-case monitoring strategy is suggested to cope with the dynamic variability between different operational cases of the turbine. Real-life data obtained from an offshore turbine on a monopile foundation are used to validate the presented strategy and to demonstrate the performance of the presented approach. First, the results indicate an overall stiffening of the investigated structure.

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