Effect of a Damage to Modal Parameters of a Wind Turbine Blade

Gunner Chr. Larsen, Peter Berring, Dmitri Tcherniak, Per Hørlyk Nielsen, Kim Branner

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Abstract

This study reports structural dynamic characteristics obtained experimentally from an extensive testing campaign on a 34m long wind turbine blade mounted on a test-rig under laboratory conditions. Further, these experimental results have been compared with analog numerical results obtained from a very detailed FE model of the same blade using 3D solid elements. Both an undamaged and a damaged blade are investigated, and it is observed that the natural frequencies of the first few modes of the blade change very little due to a significant artificial damage imposed in trailing edge, whereas the mode shapes - especially if decomposed into the flapwise, edgewise and torsional components - contain information which might be helpful for detecting and localizing wind turbine blade damages.
Original languageEnglish
Title of host publicationProceedings of the 7th European Workshop on Structural Health Monitoring
Number of pages9
PublisherINRIA
Publication date2014
Publication statusPublished - 2014
EventEuropean Workshop on Structural Health Monitoring - Nantes, France
Duration: 8 Jul 201411 Jul 2014
http://www.ewshm2014.com/

Workshop

WorkshopEuropean Workshop on Structural Health Monitoring
Country/TerritoryFrance
CityNantes
Period08/07/201411/07/2014
Internet address

Keywords

  • Dynamic characteristics
  • FE modeling
  • OMA
  • Structural damages
  • Wind turbine blade

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