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Initial Results from Experimental Dynamic Load Simulation by means of Modal Force Vectors.

Breitbach, E. und Sinapius, M. (1991) Initial Results from Experimental Dynamic Load Simulation by means of Modal Force Vectors. In: DGLR-Bericht 91-06, 91-090, Seiten 288-294. Int. Forum on Aeroelasticity and Structural Dynamics 1991 Combined with a One-Day Workshop on Smart Material Systems and Structures, June 3-6, 1991, Eurogress Center, Aachen..

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Kurzfassung

Increase of size and recent advances in lightweight design of space systems have led to the requirement of new approaches to structural dynamic testing techniques. The paper gives a brief survey of different qualification methods based on single-axis and multi-axis testing. A new concept called the modal force combination (MFC) method is proposed, in which the base excitation of a spacecraft due to various load events can be simulated by a set of forces acting directly in specially selected structural points. The forces compensate for the d'Alembert's inertia forces arising due to the transient multi-axial base accelration. The forcesare specially conditioned by a series expansion of so-called modal force distribution so that they produce the same deformations and accelerations in the structure as would occur by base excitation. Two versions of the MFC concept are presented in the paper. The first uses arbitrary orthogonal force vectors in the vicinity of the resonance frequencies, and the second is based on transfer functions.Initial experimental results are presented, taken from an applicationof the technique on a three-dimensional test structure. The results of experimental dynamic load simulation by means of modal force vectors are compared with measurements from base excitation performed on DLR's multi-axis vibration simulator MAVIS 2. In conclusion, the presented MFC versions are discussed.

elib-URL des Eintrags:https://elib.dlr.de/39444/
Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=1991, pages=8,
Titel:Initial Results from Experimental Dynamic Load Simulation by means of Modal Force Vectors.
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Breitbach, E.NICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sinapius, M.NICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:1991
Erschienen in:DGLR-Bericht 91-06
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:91-090
Seitenbereich:Seiten 288-294
Status:veröffentlicht
Stichwörter:Dynamic qualification, multi-axis transient test, flight load similation, modal force combination.
Veranstaltungstitel:Int. Forum on Aeroelasticity and Structural Dynamics 1991 Combined with a One-Day Workshop on Smart Material Systems and Structures, June 3-6, 1991, Eurogress Center, Aachen.
HGF - Forschungsbereich:NICHT SPEZIFIZIERT
HGF - Programm:keine Zuordnung
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:NICHT SPEZIFIZIERT
DLR - Forschungsgebiet:keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):NICHT SPEZIFIZIERT
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik
Hinterlegt von: DLR-Beauftragter, elib
Hinterlegt am:02 Apr 2006
Letzte Änderung:27 Apr 2009 10:43

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