A local-restart coupled strategy for simultaneous sizing and geometry truss optimization
AUTOR(ES)
Torii, André Jacomel, Lopez, Rafael Holdorf, Luersen, Marco Antônio
FONTE
Latin American Journal of Solids and Structures
DATA DE PUBLICAÇÃO
2011-09
RESUMO
This paper presents an approach for the global optimization of truss sizing and geometry that is based on a probabilistic restart procedure coupled with a local search algorithm. The resulting algorithm is able to guarantee local optimality and provides a set of local optima which contain, with an increasing probability as the number of restarts increases, the global solution. The optimization problem searches for a truss structure of minimum volume, subject to stress constraints. The design variables are the bars cross-section areas and some nodal coordinates. Several loading conditions are also considered. Finally, four numerical examples are presented and the main aspects of the approach are discussed.
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