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Informative Data fo...
Informative Data for Model Parameter Updating
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- Linderholt, Andreas, 1968- (author)
- Chalmers University of Technology,Maskinteknik
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- Abrahamsson, Thomas, 1956- (author)
- Chalmers University of Technology,Strukturdynamik
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- Hoang, Nam (author)
- Structural Engineering Program, School of Civil Engineering, Asian Institute of Technology
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(creator_code:org_t)
- Orlando, Florida, 2001
- 2001
- English.
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In: Proceedings of IMAC XIX. - Orlando, Florida. ; , s. 581-586
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Abstract
Subject headings
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- Before an error localization is to be carried out a preparatory error localization, using only data from an FE-analysis, is justified. The purpose of such preparatory work is both to decide what parameters to use to quantify model errors and to design opti- mal tests for the error localization. A reasonable re- quirement on the parameterization is that the test data are informative with respect to the parameters. That implies that a change of a certain parameter should give a detectable change in the model’s dy- namic behaviour. The aim of this study is to examine data informa- tivity with respect to physical parameters, used in error localization and model updating. The data in- formativity is here quantified by the use of the Fisher information matrix. It is shown that the in- formativity depends on both excitation and meas- urements. It is reasonable to believe that parameters of which test data have low informativ- ity, are of no use for error localization and should not be used for model updating purposes. Such pa- rameters should be excluded from the parameters set or the test aimed for its determination should be re-designed.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Keyword
- Informative Data Finite Element Model Updating
- Mechanical Engineering
- Maskinteknik
Publication and Content Type
- ref (subject category)
- kon (subject category)
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