TY - GEN
T1 - Membranes and thin shells for space reflectors
AU - Datashvili, L.
AU - Baier, H.
PY - 2006
Y1 - 2006
N2 - When the diameter of a space antenna reflector exceeds the launcher shroud dimensions, a large deployable reflector technology must be applied. For deployable reflector concepts different approaches are available ranging between shells, rod-cables and rod-membrane systems. For the latest ones having dimensionally stable thin membranes with high in plane stiffness and/or finite bending stiffness facilitating for the stowablity is significant. Using such membranes, highly accurate double curved large reflector surfaces, so called flexible thin shell-membranes can be built. New types of flexible shell-membranes based on fibre reinforced silicone technology being developed at the Institute of Lightweight Structures (LLB) are discussed and an evaluation of thermo-mechanical properties is given in the paper. Evaluation is performed via mechanical tests and FEM nonlinear analyses. Large deployable reflector SMART is presented next, which uses the mentioned shell-membrane. The design principles and building blocks of SMART as well as results of thermo-elastic and dynamic analysis using a fully parametric FE model are addressed. The feasibility of creation of the flexible shell-membrane reflecting surface for LDRs using triax carbon fibre reinforced silicone (CFRS) technology is proved. SMART reflector with CFRS surface has demonstrated the credibility of RF and mechanical concepts up to 10-12 GHz. Reflector demonstrator is being built. Copyright ASCE 2006.
AB - When the diameter of a space antenna reflector exceeds the launcher shroud dimensions, a large deployable reflector technology must be applied. For deployable reflector concepts different approaches are available ranging between shells, rod-cables and rod-membrane systems. For the latest ones having dimensionally stable thin membranes with high in plane stiffness and/or finite bending stiffness facilitating for the stowablity is significant. Using such membranes, highly accurate double curved large reflector surfaces, so called flexible thin shell-membranes can be built. New types of flexible shell-membranes based on fibre reinforced silicone technology being developed at the Institute of Lightweight Structures (LLB) are discussed and an evaluation of thermo-mechanical properties is given in the paper. Evaluation is performed via mechanical tests and FEM nonlinear analyses. Large deployable reflector SMART is presented next, which uses the mentioned shell-membrane. The design principles and building blocks of SMART as well as results of thermo-elastic and dynamic analysis using a fully parametric FE model are addressed. The feasibility of creation of the flexible shell-membrane reflecting surface for LDRs using triax carbon fibre reinforced silicone (CFRS) technology is proved. SMART reflector with CFRS surface has demonstrated the credibility of RF and mechanical concepts up to 10-12 GHz. Reflector demonstrator is being built. Copyright ASCE 2006.
UR - http://www.scopus.com/inward/record.url?scp=33845688615&partnerID=8YFLogxK
U2 - 10.1061/40830(188)7
DO - 10.1061/40830(188)7
M3 - Conference contribution
AN - SCOPUS:33845688615
SN - 0784408300
SN - 9780784408308
T3 - Earth and Space 2006 - Proceedings of the 10th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments
SP - 7
BT - Earth and Space 2006 - Proceedings of the 10th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments
T2 - Earth and Space 2006 - 10th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments
Y2 - 5 March 2006 through 8 March 2006
ER -