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Fast Identification and Characterization of Nonlinearities in Experimental Modal Analysis of Large Aircraft

Göge, Dennis (2007) Fast Identification and Characterization of Nonlinearities in Experimental Modal Analysis of Large Aircraft. Journal of Aircraft, Vol. 44 (No. 2), pp. 399-409. ISSN 0021-8669

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Official URL: http://www.aiaa.org

Abstract

The vibration characteristics of large aircraft are investigated in so-called ground-vibration tests. The experimental determination of the vibration characteristics is referred to as experimental modal analysis, which is based on linear procedure. Nonlinearities are not investigated in detail in these tests. Nowadays, the consideration of nonlinearities in the aeroelastic stability certification process is becoming more and more important. If nonlinearities are considered in the test strategy, the experimental acquisition of the nonlinear vibration characteristics can be accelerated. The aeroelastic behaviour of highly flexible structures such as large aircraft cannot be sufficiently described on the basis of linear models. New and well-established methods for the detection of nonlinearities are shown and discussed in this paper with regard to their application during industrial large-scale testing. Some of the techniques are proposed for implementation into the existing ground-vibration testing strategy. A simple modal model is presented for the identification and characterization of nonlinearities and is used for the effective enhancement of the presented identification strategy.

Item URL in elib:https://elib.dlr.de/49965/
Document Type:Article
Title:Fast Identification and Characterization of Nonlinearities in Experimental Modal Analysis of Large Aircraft
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Göge, DennisUNSPECIFIEDUNSPECIFIED
Date:2007
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:Vol. 44
Page Range:pp. 399-409
ISSN:0021-8669
Status:Published
Keywords:ground-vibration testing, experimental modal analysis, large aircraft
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:19 Jul 2007
Last Modified:27 Apr 2009 14:05

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