Design optimisation of composite panel structures with stiffening ribs under multiple loading cases

An optimisation procedure for composite panel structures with stiffening ribs is presented in this paper. The procedure employs standard FE structural analysis, structural system profile analysis, and multi-factor optimisation techniques to predict an optimum structural design. A composite antenna reflector structure in space environment is optimised. Laminate, sandwich configuration and rib shape in the structure are optimised in this application. The optimisation improves antenna performance under multiple loading cases and minimises structural mass simultaneously.