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Model Updating of Modal Parameters from Experimental Data and Applications in Aerospace

Keye, Stefan (2004) Model Updating of Modal Parameters from Experimental Data and Applications in Aerospace. Dissertation. DLR-Forschungsbericht. DLR-FB 2004-34, 197 S.

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Abstract

The research in this thesis is associated with different aspects of experimental analyses of structural dynamic systems and the correction of the corresponding mathematical models using experimental data. A comprehensive finite-element model updating software technology is assembled and various novel features are implemented. The software technology is integrated into an experimental test facility for structural dynamic identification and used in a number of real life aerospace applications. An iterative correction parameter selection technique and novel approaches for the correction of structural components with non-isotropic and viscous material properties are proposed. The influence of experimental errors on the accuracy of the model corrections is investigated using a numerical simulation procedure. To improve the quality of the experimental reference data a non-iterative method for the computation of optimised multi-point excitation force vectors for Phase Resonance Testing is introduced. Finally, possible advantages of model updating in association with a model-based method for the identification and localisation of structural damage are investigated.

Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Title:Model Updating of Modal Parameters from Experimental Data and Applications in Aerospace
Authors:
AuthorsInstitution or Email of Authors
Keye, StefanUNSPECIFIED
Date:2004
Number of Pages:197
Editors:
EditorsEmail
DLR, Bibliotheks- und Informationswesen, UNSPECIFIED
ISSN:1434-8454
Status:Published
Keywords:Model Updating, experimentelle Modalanalyse
Institution:University of Greenwich
Department:School of Computing and Mathematical Sciences
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems
Deposited By: Dr.(PH.D.) Stefan Keye
Deposited On:10 Jan 2007
Last Modified:27 Apr 2009 13:16

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