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PASSIVE DAMPING OF SPACECRAFT SANDWICH PANELS

Romberg, O. and Tausche, M. and Pereira, C. and Panning, L. (2007) PASSIVE DAMPING OF SPACECRAFT SANDWICH PANELS. 10th European Confernce on Spacecraft Structures, Materials & Mechanical Testing, 10 - 13. September 2007, Berlin, 10.-13. September 2007, Berlin, Deutschland. (Unpublished)

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Abstract

For reusable and expendable launch vehicles as well as for other spacecraft structural vibration loads are safety critical design drivers impacting mass and lifetime. Here, the improvement of reliability and safety, the reduction of mass, the extension of service life, as well as the reduction of cost for manufacturing are desired. Spacecraft structural design in general is a compromise between lightweight design and robustness with regard to dynamic loads. The structural stresses and strains due to displacements caused by dynamic loads can be reduced by mechanical damping based on passive or active measures. Passive damping systems can be relatively simple and yet are capable of suppressing a wide range of mechanical vibrations. Concepts are low priced in development, manufacturing and application as well as maintenancefree. Compared to active damping measures passive elements do not require electronics, control algorithms, power, actuators, sensors as well as complex maintenance. Moreover, a reliable application of active dampers for higher temperatures and short response times (e. g. re-entry environment) is questionable. The physical effect of passive dampers is based on the dissipation of load induced energy. Recent activities performed by OHB have shown the function of a passive friction-damping device for a vertical tail model of the German X-vehicle PHÖNIX but also for general sandwich structures. The present paper shows brand new results from a corresponding ESA-funded activity where passive damping elements are placed between the face sheets of large spacecraft relevant composite sandwich panels to demonstrate dynamic load reduction in vibration experiments on a shaker. Several passive damping measures are investigated and compared.

Document Type:Conference or Workshop Item (Speech)
Additional Information:CEAS 2007
Title:PASSIVE DAMPING OF SPACECRAFT SANDWICH PANELS
Authors:
AuthorsInstitution or Email of Authors
Romberg, O.Oliver.Romberg@dlr.de
Tausche, M.OHB-System AG
Pereira, C.RUAG Aerospace
Panning, L.Institut für Dynamik und Schwingungen
Date:10 September 2007
Status:Unpublished
Keywords:PASSIVE DAMPING OF SPACECRAFT SANDWICH PANELS
Event Title:10th European Confernce on Spacecraft Structures, Materials & Mechanical Testing, 10 - 13. September 2007, Berlin
Event Location:Berlin, Deutschland
Event Type:Conference
Event Dates:10.-13. September 2007
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Antriebsystemtechnik - Antriebskonzepte (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems
Deposited By: Nicola Behrens
Deposited On:02 Dec 2009 11:45
Last Modified:12 Dec 2013 20:42

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