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Advancements in Structural Dynamic Qualification Methods.

Sinapius, M. and Füllekrug, U. (1994) Advancements in Structural Dynamic Qualification Methods. CNES, ESA International Conference, Spacecraft Structures and Mechanical Testing, Paris, June 21-24, 1994..

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The increase of dimensions and recent advances in lightweight design of space systems have led to the requirement of new structural dynamic qualification techniques. Dynamic qualification means experimental simulation of the structural dynamic environment in order to check the dynamic behaviour of spacecraft. The paper reviews the standard (single axis testing) and advanced test methods (multi axis testing). Two principly different multi-axis test methods are described. First, the possibilities of transient load simulation by means of multi-axis hydraulic shaker facilities are discussed. Particularly the assessment of the reproduction quality of the base acceleration is emphasized. A suitable transient comparison measure is proposed. Second, a shaker test method called Modal Force Combination technique is described which replaces the base acceleration by having a set of forces acting directly in a selected number of structural points. The forces simulate the d'Alembert's inertia forces, which arise due to the transient multi-axial base acceleration. Test results are presented. Finally, the different test methods of structural dynamic qualification are compared, advantages as well as inadequacies of each procedure are pointed out. The topics of further investigation are discussed.

Item URL in elib:https://elib.dlr.de/39659/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1994, pages=10,
Title:Advancements in Structural Dynamic Qualification Methods.
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Dynamic Qualification, Flight Load simulation, Multi-axis transient test, Modal Force combination.
Event Title:CNES, ESA International Conference, Spacecraft Structures and Mechanical Testing, Paris, June 21-24, 1994.
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 10:50

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