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Passive Damping of Spacecraft Sandwich Panels

Romberg, Oliver und Tausche, Matthias und Pereira, Carlos und Panning, Lars (2007) Passive Damping of Spacecraft Sandwich Panels. In: 1st CEAS European Air and Space Conference 2007. 1st European Air and Space Conference, 2007-09-10 - 2007-09-13, Berlin, Germany. ISSN 0700-4083

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Kurzfassung

The damping ratio of a structural system has large influence on the structural response and, thus, on the stress. If the damping factor increases the stress decreases drastically, which is necessary for the operation of future reusable launch vehicles as well as to relax dynamical requirements for conventional spacecraft. In the frame of the here described activities a system of passive friction damping elements has been designed which is placed between the face sheets of large spacecraft relevant composite sandwich panels. Presently, corresponding demonstrators are in manufacturing process. Dynamical and thermal test will be performed in near future. In parallel investigations regarding the mass saving potential as well as the life span extension due to increased damping are performed. The influence on the life span will be clarified by means of S-N-curves [MIL 5H], where the critical stress (crack) is depicted versus the load cycles (= life span in case of continuous vibrating structures). Depending upon the material as well as upon the structure there are empirical results showing a decreasing boundary stress with increasing number of load cycles. Instead of steel which shows a horizontal tangent of critical stress for load cycles composite materials have a steady decreasing S-N-curve. Thus, the life span of those materials are directly affected by the number of load cycles in combination with the vibration amplitude. The degree of life span extension depends strongly upon the material, the structure and the load cases and can be quantified for individual cases only. In any case the impact of long term application, wear and temperature impact have to be considered, too.

Dokumentart:Konferenzbeitrag (NICHT SPEZIFIZIERT)
Titel:Passive Damping of Spacecraft Sandwich Panels
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID
Romberg, OliverNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Tausche, MatthiasOHB-System AGNICHT SPEZIFIZIERT
Pereira, CarlosRUAG AGNICHT SPEZIFIZIERT
Panning, LarsUniversität HannoverNICHT SPEZIFIZIERT
Datum:13 September 2007
Erschienen in:1st CEAS European Air and Space Conference 2007
Referierte Publikation:Nein
In Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
DGLR, NICHT SPEZIFIZIERT
ISSN:0700-4083
Status:veröffentlicht
Stichwörter:Spacecraft Structure, Dynamical Loads, Mechanical Damping, Passive Damping, Friction Damping
Veranstaltungstitel:1st European Air and Space Conference
Veranstaltungsort:Berlin, Germany
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-09-10 - 2007-09-13
Veranstalter :DGLR
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W - keine Zuordnung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):W - keine Zuordnung (alt)
Standort: Bremen
Institute & Einrichtungen:Institut für Raumfahrtsysteme > Systemanalyse Raumsegmente
Hinterlegt von: Romberg, Dr.-Ing. Oliver
Hinterlegt am:27 Dez 2007
Letzte Änderung:05 Okt 2016 16:10

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