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Experiences with dynamic load simulation by means of modal forces in the presence of structural non-linearities

Göge, Dennis and Sinapius, Michael (2006) Experiences with dynamic load simulation by means of modal forces in the presence of structural non-linearities. Aerospace Science and Technology, 10, pp. 411-419. Elsevier.

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The dynamic qualification of space structures today is performed by means of driven base tests in order to simulate the dynamic environment during launch. This method is limited to structures that fit onto the shaker facility. For large and unwieldy structures an alternative approach can be utilised which applies modal forces for the qualification. Modal forces are patterns of single forces that are able to excite single resonances. These force patterns can be applied by movable electrodynamic shakers. This article reviews the background of the method. A test strategy is proposed which is based on narrow-banded swept sine excitation and considers structural non-linearities observed frequently. The qualification method was utilised during the qualification of the European Robotic Arm (ERA). The experiences gained during the test campaign are compiled in the paper. The advantages and disadvantages of dynamic qualification by means of modal forces are discussed.

Item URL in elib:https://elib.dlr.de/44344/
Document Type:Article
Title:Experiences with dynamic load simulation by means of modal forces in the presence of structural non-linearities
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Göge, DennisInstitute of AeroelasticityUNSPECIFIEDUNSPECIFIED
Sinapius, MichaelInstitute of Composite Structures and Adaptive SystemsUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 411-419
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:strukturdynamische Qualifikation, Modalkraftkombination, strukturelle Nichtlinearitäten , dynamic qualification, modal force combination, structural non-linearities
HGF - Research field:other
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:02 Aug 2006
Last Modified:27 Apr 2009 13:00

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