Steady State Shift Damage Localization in a Residential-Sized Wind Turbine Blade

Morten Kusk Markvart, Claus Sekjær, Thomas Bull, Rasmus Johan Johansen, Martin Dalgaard Ulriksen, D. Tcherniak, Lars Damkilde

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Abstract

This paper presents an experimental damage localization study, in which the recently proposed steady state shift damage localization (S3DL) method is tested in the context of a residential-sized wind turbine blade. The S3DL method constitutes a model-based damage localization scheme, whose methodological premise is that of mapping a model-based damage distribution to experimental vibration features from the healthy and damaged states. Damage is then localized when a postulated damage distribution yields a, under ideal conditions, perfect mapping. The S3DL method relies on a theoretical model that, to a certain degree of accuracy, emulates the actual structure in its healthy, reference state. Additionally, the method requires that the input distribution is spatially invariant and that the excitation is a single time history or repeatable. The S3DL method has previously been applied, successfully, in an experimental procedure with a plate-like structure, thus the present study serves to investigate the applicability of the method for more complex structures; in this case, a residential-sized wind turbine blade, which has been designed specifically for damage identification purposes. The blade consists of two parts that are bolted together along the leading and trailing edges, hence enabling introduction of stiffness-related damages by untightening a number of bolts. The paper studies two damage cases: failure of the trailing edge and a mass modification.
OriginalsprogEngelsk
TitelProceedings of the International Conference on Structural Engineering Dynamics - ICEDyn 2017
RedaktørerNuno M. M. Maia, Miguel de Matos Neves, Rui Chedas de Sampaio
Publikationsdato2017
Artikelnummer59
ISBN (Elektronisk)978-989-99424-4-8
StatusUdgivet - 2017
BegivenhedInternational Conference on Structural Engineering Dynamics ICEDyn 2017 - Ericeira, Portugal
Varighed: 3 jul. 20175 jul. 2017

Konference

KonferenceInternational Conference on Structural Engineering Dynamics ICEDyn 2017
Land/OmrådePortugal
By Ericeira
Periode03/07/201705/07/2017

Emneord

  • Structural health monitoring (SHM)
  • Steady state shift damage localization (S3DL)
  • Damage localization

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