Integrated monitoring of offshore wind turbines - requirements, concepts and experiences

Rolf Guenter Rohrmann, Sebastian Thöns, Werner Ruecker

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Wind turbines on offshore sites (OWECs) are subjected to combined loads from wind and waves. These dynamic loads, with a frequency content within the range of the natural frequencies of the structures, cause fatigue-effective stresses in the substructures of wind turbines. Therefore, the examination of natural frequencies is an important part within the design process of wind turbines. The quality of the numerical models for such calculations is of great importance, since the certification guidelines permit only small uncertainties in modal analysis results. The accuracy of the parameters of the numerical model can only be achieved through a comparison of simulation results with corresponding test results. Therefore, it is necessary to measure the dynamic behaviour of all components of the wind turbines simultaneously. This is true not only for the design verification, but also for monitoring the OWECs in operation. The potential of integrated systems for monitoring-based maintenance optimisation should thus be used.
Original languageEnglish
JournalStructure and Infrastructure Engineering
Volume6
Issue number5
Pages (from-to)575-591
Number of pages17
ISSN1573-2479
DOIs
Publication statusPublished - 2010
Externally publishedYes

Keywords

  • Dynamic loads
  • Damage indicators
  • Data management
  • Integrated monitoring system
  • Offshore wind turbines
  • Structural assessment
  • Damage indicator

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