Topology optimization of double-curved double-layer grids

Abstract

A topology optimization procedure for double layer grids which have square-on-square configuration and top and/or bottom layers are curved in one or two directions is presented. The number of nodes is treated as design variables during optimization process; as a result, the number of members varies. The configuration of grid structures is generated using the graph product operations. The coordinates of nodes and the cross sections of members are taken as continuous and discrete design variables, respectively. As an optimizer, a new swarm based optimization algorithm called Artificial Bee Colony algorithm is used. A design example is included to show the applicability of the presented procedure for optimization of double-curved double-layer grids.