Topology Optimization of Multicomponent Beam Structure via Decomposition-Based Assembly Synthesis

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 vari...

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Veröffentlicht in:Journal of mechanical design (1990) 2005-03, Vol.127 (2), p.170-183
Hauptverfasser: Lyu, Naesung, Saitou, Kazuhiro
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:1050-0472
1528-9001
DOI:10.1115/1.1814671