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

Gunner Chr. Larsen 1 Peter Berring 2 Dmitri Tcherniak 3 Per Hørlyk Nielsen 1 Kim Branner 2
1 DTU - Technical University of Denmark [Lyngby]
2 Wind Energy Division [Roskilde]
Risø DTU - Risø National Laboratory for Sustainable Energy
3 Bruel and Kjaer Sound and Vibration Measurement
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 tailing 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.
Keywords : Energy SHM applications for wind turbines Modal analysis Damage detection and localization
Type de document :
Communication dans un congrès
Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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  • HAL Id : hal-01020347, version 1

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EWSHM2014 | EWSHM-TUAT6 | INSMI

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Gunner Chr. Larsen, Peter Berring, Dmitri Tcherniak, Per Hørlyk Nielsen, Kim Branner. Effect of a Damage to Modal Parameters of a Wind Turbine Blade. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01020347〉

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