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A Review of Experimental Modal Analysis Methods with respect to their Applicability to Test Data of Large Aircraft Structures

Böswald, Marc and Göge, Dennis and Füllekrug, Ulrich and Govers, Yves (2006) A Review of Experimental Modal Analysis Methods with respect to their Applicability to Test Data of Large Aircraft Structures. In: Proceedings of the International Seminar of Modal Analysis, pp. 2461-2481. ISMA 2006 - International Conference on Noise & Vibration Engineering, 2006-09-18 - 2006-09-20, Leuven, Belgium (Europe).

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Abstract

In this paper, different modal analysis tools are investigated with respect to their applicability to test data from ground vibration tests (GVT) of large aircraft. Three different modal analysis methods are investigated. These are the Frequency Domain Direct Parameter Identification (FDPI), the Least-Squares complex Exponential method (LSCE), and the Least-Squares Complex Frequency Domain method (LSCF or Poly MAX). Test data from GVT of a large aircraft usually have features like noise contamination and weak non-linearity of some modes. Thus, the influence on the results of experimental modal analysis of statistical errors (such as noise) and systematic errors (such as non-linearity) in the FRFs are investigated. Simulated FRFs of an analytical system contaminated with different levels of artificial noise are used to study the influence of statistical errors, whereas simulated non-linear FRFs obtained from an analytical system with a friction-type non-linearity is used to study the influence of systematic errors. In addition, the aforementioned modal analysis methods were applied to a dataset acquired during the GVT of the Airbus A380. The modal analysis results obtained with the different analysis methods are compared and evaluated based on the results of the analytical study of the influence of statistical and systematic errors.

Item URL in elib:https://elib.dlr.de/45077/
Document Type:Conference or Workshop Item (Paper)
Title:A Review of Experimental Modal Analysis Methods with respect to their Applicability to Test Data of Large Aircraft Structures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Böswald, MarcUNSPECIFIEDUNSPECIFIED
Göge, DennisUNSPECIFIEDUNSPECIFIED
Füllekrug, UlrichUNSPECIFIEDUNSPECIFIED
Govers, YvesUNSPECIFIEDUNSPECIFIED
Date:2006
Journal or Publication Title:Proceedings of the International Seminar of Modal Analysis
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 2461-2481
Status:Published
Keywords:ground vibration test
Event Title:ISMA 2006 - International Conference on Noise & Vibration Engineering
Event Location:Leuven, Belgium (Europe)
Event Type:international Conference
Event Dates:2006-09-18 - 2006-09-20
Organizer:Katholieke Universiteit Leuven
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:20 Oct 2006
Last Modified:27 Apr 2009 13:09

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