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

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.
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https://hal.inria.fr/hal-01020347
Contributor : Anne Jaigu <>
Submitted on : Tuesday, July 8, 2014 - 9:57:59 AM
Last modification on : Sunday, December 31, 2017 - 3:40:02 PM
Long-term archiving on: : Wednesday, October 8, 2014 - 11:36:42 AM

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  • HAL Id : hal-01020347, version 1

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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. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01020347⟩

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