This paper presents a method for synthesizing multicomponent beam structural assemblies with maximum structural performance and manufacturability. The problem is posed as a relaxation of decomposition-based assembly synthesis, where both topology and decomposition of a structure are regarded as variables over a ground structure with nonoverlapping beams. A multiobjective genetic algorithm with graph-based crossover, coupled with FEM analyses, is used to obtain Pareto optimal solutions to this problem, exhibiting trade-offs among structural stiffness, total weight, component manufacturability (size and simplicity), and the number of joints. Case studies with a cantilever and a simplified automotive floor frame are presented, and representative designs in the Pareto front are examined for the trade-offs among the multiple criteria.
Topology Optimization of Multicomponent Beam Structure via Decomposition-Based Assembly Synthesis
Contributed by the Design Automation Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received April 21, 2003; revised April 19, 2004. Associate Editor: G. M. Fadel.
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Lyu, N., and Saitou, K. (March 25, 2005). "Topology Optimization of Multicomponent Beam Structure via Decomposition-Based Assembly Synthesis ." ASME. J. Mech. Des. March 2005; 127(2): 170–183. https://doi.org/10.1115/1.1814671
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