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Modal analysis and identification of deployable membrane structures
KTH, School of Engineering Sciences (SCI), Mechanics. Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150080, Heilongjiang, Peoples R China.
Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150080, Heilongjiang, Peoples R China..
China Acad Space Technol, Qian Xuesen Lab Space Technol, Beijing 100094, Peoples R China..
Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150080, Heilongjiang, Peoples R China..
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2018 (English)In: Acta Astronautica, ISSN 0094-5765, E-ISSN 1879-2030, Vol. 152, p. 811-822Article in journal (Refereed) Published
Abstract [en]

The development of ultra-lightweight sails presents many challenges due to their large size and extreme flexibility. One of their key technologies is the design of deployable booms, in particular how to deploy and support the membrane structure. In this paper, a deployable sail with four triangular membranes supported by inflated booms enhanced by four self-supporting thin shells inside and Velcro outside is presented. The feasibility of the folding and unfolding processes is demonstrated, and their modal properties investigated. Firstly, the pressure variation and acceleration time history of a single boom during unfolding process were obtained by dynamic testing system, a finite element model of boom was proposed and structural natural frequencies by simulation were validated by experimental testing. Further, an 8.0 x 8.0 m(2) prototype was assembled and stowed in a Phi 700 mm by 300 mm container, and the structure was fully deployed with gas control. A finite element model of a combination of inflatable booms and triangular membranes was used to predict the structural overall bending modes. The effect of membrane wrinkling was simulated and controlled to improve membrane precision. This work validated the concept of deployable membrane structural design. The proposed finite element models were verified by experimental testing to be useful for membrane structure analysis.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 152, p. 811-822
Keywords [en]
Inflation, Membrane sail, Deployment, Modal analysis, Boom
National Category
Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-239487DOI: 10.1016/j.actaastro.2018.09.024ISI: 000449235500079Scopus ID: 2-s2.0-85054423887OAI: oai:DiVA.org:kth-239487DiVA, id: diva2:1266209
Note

QC 20181127

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-03-18Bibliographically approved

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Wei, JianzhengEriksson, Anders

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