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Passive Damping of Spacecraft Sandwich Panels

Romberg, Oliver and Tausche, Matthias and Pereira, Carlos and 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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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.

Item URL in elib:https://elib.dlr.de/51121/
Document Type:Conference or Workshop Item (UNSPECIFIED)
Title:Passive Damping of Spacecraft Sandwich Panels
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Romberg, OliverUNSPECIFIEDhttps://orcid.org/0000-0003-2287-2910
Tausche, MatthiasOHB-System AGUNSPECIFIED
Panning, LarsUniversität HannoverUNSPECIFIED
Date:13 September 2007
Journal or Publication Title:1st CEAS European Air and Space Conference 2007
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iD
Keywords:Spacecraft Structure, Dynamical Loads, Mechanical Damping, Passive Damping, Friction Damping
Event Title:1st European Air and Space Conference
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:2007-09-10 - 2007-09-13
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > System Analysis Space Segment
Deposited By: Romberg, Dr.-Ing. Oliver
Deposited On:27 Dec 2007
Last Modified:04 May 2020 10:37

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