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Improving the performance of model-based damage detection methods through the use of an updated analytical model

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Title: Improving the performance of model-based damage detection methods through the use of an updated analytical model
Alternate Title: Zur Verbesserung modellbasierter Schadenslokalisationsmethoden durch Verwendung korrigierter analytischer Modelle
Authors: Keye, S.1 stefan.keye@dlr.de
Source: Aerospace Science & Technology. Apr2006, Vol. 10 Issue 3, p199-206. 8p.
Subjects: Finite element method, Carbon fibers, Modal analysis, Polymers
Abstract (English): Abstract: The advantages of finite-element model updating in association with a model-based method for structural damage localisation are investigated. An approach designed to identify and locate delamination damages in carbon fibre reinforced polymers is used. The method is based on a correlation between measured damage-induced modal damping variations from an elasto-mechanic structure and the corresponding data from a numerical model in order to derive information on the damage location. Using a numerical model enables to locate damage in a three-dimensional structure from experimental data obtained with only a single response sensor. To acquire sufficiently accurate experimental data a polynomial curve fitting technique is used to extract damping parameters from measured frequency responses. It will be shown that in order to achieve a good localisation precision the numerical model must retain a high degree of accuracy and physical consistency. [Copyright &y& Elsevier]
Abstract (German): Zusammenfassung: Die Vorteile der Korrektur von Finite-Elemente Modellen im Zusammenhang mit einem modellbasierten Verfahren zur Lokalisation struktureller Schäden werden untersucht. Zur Schadenserkennung wird ein Ansatz zur Identifikation und Lokalisation von Delaminationsschäden in kohlefaserverstärkten Polymeren benutzt. Das Verfahren basiert auf der Korrelation gemessener schadensinduzierter Dämpfungsänderungen einer elastmechanischen Struktur mit den entsprechenden Daten eines numerischen Modells, aus der sich Informationen auf den Ort des Schadens ableiten lassen. Die Verwendung eines numerischen Modells ermöglicht die Lokalisation eines Schadens in einer dreidimensionalen Struktur aus Meßdaten eines einzigen Sensors. Um eine hinreichende Genauigkeit zu gewährleisten, werden die experimentellen Dämpfungsfaktoren mit Hilfe eines Polynomansatzes aus den gemessenen Frequenzgängen extrahiert. Es zeigt sich, dass für eine exakte Bestimmung des Schadensortes ein genaues, physikalisch korrektes numerisches Modell unerläßlich ist.
Copyright of Aerospace Science & Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 20403065
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Improving the performance of model-based damage detection methods through the use of an updated analytical model
– Name: TitleAlt
  Label: Alternate Title
  Group: TiAlt
  Data: Zur Verbesserung modellbasierter Schadenslokalisationsmethoden durch Verwendung korrigierter analytischer Modelle
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Keye%2C+S%2E%22">Keye, S.</searchLink><relatesTo>1</relatesTo><i> stefan.keye@dlr.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Aerospace+Science+%26+Technology%22">Aerospace Science & Technology</searchLink>. Apr2006, Vol. 10 Issue 3, p199-206. 8p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+fibers%22">Carbon fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Modal+analysis%22">Modal analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: Abstract: The advantages of finite-element model updating in association with a model-based method for structural damage localisation are investigated. An approach designed to identify and locate delamination damages in carbon fibre reinforced polymers is used. The method is based on a correlation between measured damage-induced modal damping variations from an elasto-mechanic structure and the corresponding data from a numerical model in order to derive information on the damage location. Using a numerical model enables to locate damage in a three-dimensional structure from experimental data obtained with only a single response sensor. To acquire sufficiently accurate experimental data a polynomial curve fitting technique is used to extract damping parameters from measured frequency responses. It will be shown that in order to achieve a good localisation precision the numerical model must retain a high degree of accuracy and physical consistency. [Copyright &y& Elsevier]
– Name: Abstract
  Label: Abstract (German)
  Group: Ab
  Data: Zusammenfassung: Die Vorteile der Korrektur von Finite-Elemente Modellen im Zusammenhang mit einem modellbasierten Verfahren zur Lokalisation struktureller Schäden werden untersucht. Zur Schadenserkennung wird ein Ansatz zur Identifikation und Lokalisation von Delaminationsschäden in kohlefaserverstärkten Polymeren benutzt. Das Verfahren basiert auf der Korrelation gemessener schadensinduzierter Dämpfungsänderungen einer elastmechanischen Struktur mit den entsprechenden Daten eines numerischen Modells, aus der sich Informationen auf den Ort des Schadens ableiten lassen. Die Verwendung eines numerischen Modells ermöglicht die Lokalisation eines Schadens in einer dreidimensionalen Struktur aus Meßdaten eines einzigen Sensors. Um eine hinreichende Genauigkeit zu gewährleisten, werden die experimentellen Dämpfungsfaktoren mit Hilfe eines Polynomansatzes aus den gemessenen Frequenzgängen extrahiert. Es zeigt sich, dass für eine exakte Bestimmung des Schadensortes ein genaues, physikalisch korrektes numerisches Modell unerläßlich ist. </ce:abst [Copyright 2006 Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Aerospace Science & Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ast.2005.11.011
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 199
    Subjects:
      – SubjectFull: Finite element method
        Type: general
      – SubjectFull: Carbon fibers
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      – SubjectFull: Modal analysis
        Type: general
      – SubjectFull: Polymers
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              Text: Apr2006
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              Y: 2006
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