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Theoretical Prediction and Experimental Verification of Optimum Exciter Configurations for Modal Testing.

Bifulco, A. and Degener, M. (1996) Theoretical Prediction and Experimental Verification of Optimum Exciter Configurations for Modal Testing. In: Identification in Engineering Systems, Proceedings of the Conference held at Swansea, March 1996, pp. 377-387. The Cromwell Press LTD., Broughton Gifford, Mellisham, UK. International Conference on Identification in Engineering Systems, Swansea, UK, 27-29 March 1996.

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Abstract

Although much progress has been achieved in the predictive capa- bilities of modern finite element codes in structural dynamics, experimental investigations are necessary to validate and to update the respective mathematical model. The reliability of the measured data in modal testing depends significantly on the applied exciter locations and force distribution. Advanced knowledge of optimum exciter configurations could increase the measuring capacity and reduce test time. Based on the results of a pre-test finite element analysis, an algorithm aimed at the optimization of the exciter locations and force appropriation for phase resonance modal testing has been developed, availing itself of a genetic algorithm procedure.In numerical tests this optimization algorithm has shown its potential both in finding the optimal force appropriation and in minimizing the number of strictly necessary exciters. To verify the capabilities of this algorithm, experimental studies were performed on actual test cases. The predicted optimum exciter configurations were applied and compared with the results of a modal survey test. The present paper describes the theoretical and experimental investigations and correlates to the respective test results. The advantages of the approach are reviewed and improvements from experimental requirements are suggested.

Item URL in elib:https://elib.dlr.de/39757/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1996,
Title:Theoretical Prediction and Experimental Verification of Optimum Exciter Configurations for Modal Testing.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bifulco, A.UNSPECIFIEDUNSPECIFIED
Degener, M.UNSPECIFIEDUNSPECIFIED
Date:1996
Journal or Publication Title:Identification in Engineering Systems, Proceedings of the Conference held at Swansea, March 1996
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 377-387
Publisher:The Cromwell Press LTD., Broughton Gifford, Mellisham, UK
Status:Published
Keywords:system identification, modal testing, optimum exciter locations
Event Title:International Conference on Identification in Engineering Systems, Swansea, UK, 27-29 March 1996
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:53

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