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Assessment of computational model updating procedures with regard to model validation

Göge, D. and Link, M. (2003) Assessment of computational model updating procedures with regard to model validation. Aerospace Science and Technology, 7 (1), pp. 47-61.

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Abstract

In this paper two different computational model updating (CMU) methods are compared. Both procedures make use of the inverse sensitivity approach. The residuals of the first method are formed by eigenvalue and mode shape differences whereas the residuals of the second method include eigenvalue and frequency response errors. Computational model updating of physical mass, stiffness and geometric parameters is possible with the first technikque. The second method additionally allows updating of viscous modal damping parameters. This second method uses directly measured frequency response data taken only at the resonance peaks. Since both methods allow to handle incomplete test data vectors, that means that the number of measured degrees of freedom (dof) is much less than the dof no. of the mathematical model, they are able to deal with large order aerospace finite element (FE) models. Both procedures were used to investigate the prediction capability of an updated analytical model of a benchmark test structure with respect to the test data of a modified structure. The results of both techniques are compared, advantages and disadvantages are pointed out and an assessment with respect to the operational validity is given.

Item URL in elib:https://elib.dlr.de/14373/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2003,
Title:Assessment of computational model updating procedures with regard to model validation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Göge, D.UNSPECIFIEDUNSPECIFIED
Link, M.UNSPECIFIEDUNSPECIFIED
Date:2003
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:7
Page Range:pp. 47-61
Status:Published
Keywords:modal validation; computational model updating; inverse sensitivity approach; different residuals; mass, stiffness, geometric and modal damping parameters; different structural configurations
HGF - Research field:other
HGF - Program:UNSPECIFIED
HGF - Program Themes:UNSPECIFIED
DLR - Research area:no assignment
DLR - Program:UNSPECIFIED
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:46

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