GAと局所ルールによる薄板補強リブの最適化

概要

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In this paper, a new technique for optimum rib layout in plate and shell structures is presented using the genetic algorithm. In the technique, the design model is discretized into bending plate elements. Element thicknesses such as t_<plate> and t_<rlb> for plate and rib elements correspond to GA genes 0 and 1,respectively. The chromosomes of GA are arranged in a matrix and have block crossover process between the blocks of 3×3 genes. To avoid rib element concentration, this block is subjected to several constraints. According to the strain energy density of elements, a local rule is formulated. Using this local rule, manipulation among genes can progress and convergence is rapid while the reliability of the GA is simultaneously improved. In this technique, the rib elements can be placed in optional positions. According to the connection of rib elements, optimal stiffener can be obtained without any special assumptions.
一般社団法人日本機械学会の論文
1998-01-25