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Stochastic Model Updating by Covariance Matrix Adjustment

Govers, Yves and Link, Michael (2009) Stochastic Model Updating by Covariance Matrix Adjustment. ICEDyn 2009 - International Conference on Structural Engineering Dynamics, 22-24 June 2009, Ericeira, Portugal (Europe).

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With deterministic methods finite element model parameters are updated by using a single set of experimental data. As a consequence the corrected analytical model only reflects this single test case. However, test data are inherently exposed to uncertainty due to measurement errors, different modal extraction techniques etc. Even a more relevant factor for variability originates from production tolerances and consequently the question arises, how to describe model parameters from the stochastic point of view? Therefore it would be desirable to use statistical properties of multiple sets of experimental and to consider the update parameters as random variables. This paper presents an inverse approach how to identify a stochastic finite element model from uncertain test data. In detail, this work demonstrates a method to adjust design parameter means and their related covariance matrix from multiple sets of experimental modal data. Results are shown from a numerical example.

Item URL in elib:https://elib.dlr.de/61776/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Stochastic Model Updating by Covariance Matrix Adjustment
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Link, MichaelUniversity of Kassel, Institute for Statics and DynamicsUNSPECIFIED
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:stochastic model updating, uncertainty, inverse problems
Event Title:ICEDyn 2009 - International Conference on Structural Engineering Dynamics
Event Location:Ericeira, Portugal (Europe)
Event Type:international Conference
Event Dates:22-24 June 2009
Organizer:IDMEC - Instituto de Engenharia Mecânica
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:21 Jan 2010 11:41
Last Modified:21 Jan 2010 11:41

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