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A Comparison of Finite Element Model ErrorLocalization Methods
Chalmers University of Technology, Sweden. (Maskinteknik)ORCID iD: 0000-0002-4404-5708
Chalmers University of Technology, Sweden. (Strukturdynamik)
1999 (English)In: International Modal Analysis Conference (IMAC) XVII, Orlando, Florida, 1999., 1999, 929-935 p.Conference paper, Published paper (Other academic)
Abstract [en]

The aim of this study is to compare a new and some existing finite elementmodel error localization methods. The methods are applied to two problems. First,fundamental properties of the error localization methodsare studied on asimple sprung mass system. Inthe second problem a three-bay frame structure is studied.Here the analytical results of a finite element analysisis taken as substitute for measured  data. The model differences between  thismodel and a perturbed model are then found by use of error localization methods. When data from a known finite element model take place as substitute for test data, the cause of the differences between the data sets are known. A so-calledconsistent para­ meterization, i.e. a parameterization of the quantities known to be in error, is then possible. The error localization methods are compared for both consistent and inconsistent parameterization. A pre-error  localization  is  made. It is based  on  the  finiteelement model's properties. Candidatemodel parameters, possibly in error, for which the experimental data are not informative, are rejected. Non-identifiable parameters are also rejected. Quantification of data information richness and identifiability with newly  developed index numbers support the pre-error localization.

Four error localization methods are compared. Two of these are developed by Lallement and Piranda. These are the so­ called Balancing of Eigenvalue Equation and Best Subspace Methods. The third is developed by Link and Santiago and is the Substructure Energy Function Method. A new localization method, using gradient and Hessian information of the error criterion function, constitute the fourth method.

Place, publisher, year, edition, pages
1999. 929-935 p.
Keyword [en]
Finite element model error localization
National Category
Applied Mechanics
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-43235OAI: oai:DiVA.org:lnu-43235DiVA: diva2:812140
Conference
International Modal Analysis Conference (IMAC) XVII
Note

Linderholt, former Larsson.

Available from: 2015-05-16 Created: 2015-05-16 Last updated: 2015-08-03Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf