Damage Localization in a Residential-Sized Wind Turbine Blade using Subspace Exclusion Zones

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Abstrakt

Wind turbines are repeatedly exposed to natural loads, which, in general, have a significant influence on the structural lifetime. Therefore, maintenance and manual inspection are of great importance in the attempt to reduce catastrophic failures; both in onshore and offshore scenarios. Vibration-based structural health monitoring (SHM) has the potential to provide information about potential structural deterioration, hence allowing for efficient inspection and, as such, a reduction in operational costs. However, this requires a robust method for each step of the damage identification process, which consists of four subcategories proposed by A. Rytter [1]; namely, detection, localization, assessment and consequence. The process is performed stepwise, hence leading to that detection must be completed before locating the damage. Detecting damages in wind turbines has been solved with reasonable success [2], but a robust solution to the next step in the damage identification process, finding its location, has not been provided. A contribution to the second step is the newly developed method subspace exclusion zone (SEZ), proposed by Bernal and Ulriksen [3]. The SEZ method is a model-based damage localization approach, which facilitates a user-defined localization resolution. The method operates by mapping the damage-induced difference in the kinematic response, from an undamaged and damaged state, to a theoretical model of the structure. The SEZ method has shown promising results in the context of numerical simulations and laboratory experiments with a simple beam structure [4]. Therefore, the focus of this paper is to test the SEZ method on a more complex geometry, here, the residential-sized wind turbine blade in a laboratory environment.
OriginalsprogEngelsk
TitelProceedings of NSCM 30 : The 30th Nordic Seminar on Computational Mechanics 25-27 October 2017
RedaktørerJan Høgsberg, Niels L. Pedersen
UdgivelsesstedLyngby
ForlagDTU Mechanical Engineering
Publikationsdato2017
Sider171-174
StatusUdgivet - 2017
Begivenhed30th Nordic Seminar on Computational Mechanics - Technical University of Denmark Anker Engelunds Vej 1, Bygning 101A 2800 Kgs. , Lyngby, Danmark
Varighed: 25 okt. 201727 okt. 2017
Konferencens nummer: 30

Konference

Konference30th Nordic Seminar on Computational Mechanics
Nummer30
LokationTechnical University of Denmark Anker Engelunds Vej 1, Bygning 101A 2800 Kgs.
Land/OmrådeDanmark
ByLyngby
Periode25/10/201727/10/2017
NavnProceedings of the Nordic Seminar on Computational Mechanics, (NSCM)
ISSN1652-8549

Bibliografisk note

Copyright © 2017 by Department of Mechanical Engineering

Emneord

  • Structural health monitoring
  • Damage localization
  • Subspace exclusion zones
  • System identification-free localization

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