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E.V. Morozov¹, A.V. Lopatin² and V.D. Bakaenko²

¹School of Engineering and Information Technology, University of New South Wales at the Australian Defence Force Academy, Canberra, Australia
²Department of Aerospace Engineering, Siberian State Aerospace University, Krasnoyarsk, Russia

Keywords: umbrella-type space antenna, telescopic latticed spoke, composite materials, finite-element modelling, buckling, modal analysis, design..

Summary

An umbrella-type design of deployable space antenna consisting of a lightweight knitted mesh and radial telescopic cantilever spokes is considered in this paper. The spokes are designed to rigidly retain the curvature determined by the parabolic geometry of the reflector and are pivoted from an axial position to the radial one. The final shape of the reflector is controlled by the tie cable network attached to the set of spokes. Each spoke consists of a few rods having a three dimensional latticed structure composed of systems of helical and hoop ribs made of composite material. The parametric modal and buckling analyses have been performed for the latticed rods having various numbers of helical ribs and their angles of orientation. Based on the computational results obtained in these analyses the structural parameters delivering a substantial mass reduction of the latticed rods subject to constraints imposed on the critical buckling loads and natural frequencies are determined. The effectiveness of the modelling approach developed in the work, described in this paper, is demonstrated using a particular example of designing the composite latticed 26.9 m long spoke made of carbon fibre reinforced plastic for an umbrella-type space antenna.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 198 Structural Analysis of Composite Latticed Spoke of an Umbrella-Type Space Antenna E.V. Morozov¹, A.V. Lopatin² and V.D. Bakaenko² ¹School of Engineering and Information Technology, University of New South Wales at the Australian Defence Force Academy, Canberra, Australia ²Department of Aerospace Engineering, Siberian State Aerospace University, Krasnoyarsk, Russia doi:10.4203/ccp.106.198 purchase the full-text of this paper Full Bibliographic Reference for this paper E.V. Morozov, A.V. Lopatin, V.D. Bakaenko, "Structural Analysis of Composite Latticed Spoke of an Umbrella-Type Space Antenna", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 198, 2014. doi:10.4203/ccp.106.198 Keywords: umbrella-type space antenna, telescopic latticed spoke, composite materials, finite-element modelling, buckling, modal analysis, design.. Summary An umbrella-type design of deployable space antenna consisting of a lightweight knitted mesh and radial telescopic cantilever spokes is considered in this paper. The spokes are designed to rigidly retain the curvature determined by the parabolic geometry of the reflector and are pivoted from an axial position to the radial one. The final shape of the reflector is controlled by the tie cable network attached to the set of spokes. Each spoke consists of a few rods having a three dimensional latticed structure composed of systems of helical and hoop ribs made of composite material. The parametric modal and buckling analyses have been performed for the latticed rods having various numbers of helical ribs and their angles of orientation. Based on the computational results obtained in these analyses the structural parameters delivering a substantial mass reduction of the latticed rods subject to constraints imposed on the critical buckling loads and natural frequencies are determined. The effectiveness of the modelling approach developed in the work, described in this paper, is demonstrated using a particular example of designing the composite latticed 26.9 m long spoke made of carbon fibre reinforced plastic for an umbrella-type space antenna. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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