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Fuzzy model updating and its application to the DLR Airmod structure

Khodaparast, H.H. and Govers, Yves and Adhikari, S. and Link, M. and Friswell, M.I. and Mottershead, J.E. and Sienz, J. (2014) Fuzzy model updating and its application to the DLR Airmod structure. In: International Conference on Uncertainty in Structural Dynamics, pp. 4631-4644. ISMA 2014, 15.-17. Sept. 2014, Leuven, Belgien.

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Abstract

This paper addresses the problem of fuzzy model updating and its application to the DLR AIRMOD structure. The theory of the method is first explained and its application is demonstrated in a three degree of freedom mass-spring system. The method is then applied to the DLR AIRMOD structure. In order to take into account the variability in measurements arising from the assembly process, the DLR AIRMOD structure is repeatedly disassembled and reassembled and modal testing was carried out for each case. This provided a database of modal variability due to uncertainty in joint and support stiffnesses and masses of cables and screws. The histograms of measured data are utilised to determine the fuzzy membership functions of the selected outputs and they have been used to update the fuzzy membership functions of input parameters. To this end, a fuzzy parameter is represented as a set of interval variables via the membership function and the Kriging meta-model is used to speed up the process of updating.

Item URL in elib:https://elib.dlr.de/91504/
Document Type:Conference or Workshop Item (Speech)
Title:Fuzzy model updating and its application to the DLR Airmod structure
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Khodaparast, H.H.Centre for Engineering Dynamics, University of LiverpoolUNSPECIFIED
Govers, Yvesyves.govers (at) dlr.deUNSPECIFIED
Adhikari, S.UNSPECIFIEDUNSPECIFIED
Link, M.Kassel University, Kassel, GermanyUNSPECIFIED
Friswell, M.I.Bristol University, Bristol, UKUNSPECIFIED
Mottershead, J.E.Liverpool University, Liverpool, UKUNSPECIFIED
Sienz, J.UNSPECIFIEDUNSPECIFIED
Date:2014
Journal or Publication Title:International Conference on Uncertainty in Structural Dynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 4631-4644
Status:Published
Keywords:airmod structure, fuzzy model updating, mass-spring system, modal variability
Event Title:ISMA 2014
Event Location:Leuven, Belgien
Event Type:international Conference
Event Dates:15.-17. Sept. 2014
Organizer:Katholieke Universiteit Leuven
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Deposited By: Grischke, Birgid
Deposited On:23 Dec 2014 14:14
Last Modified:13 Jan 2015 14:00

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