拡張ESO法による構造形態の創生 : 多目的適応型構造とシェル構造への適用

概要

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Evolutionary Structural Optimization (ESO) method is one of the most powerful and promising technique for pursuing the optimal structural form among the other methods as the homogenization design technique and the bubble method. Although it is easy to carry out the calculation of ESO, there have been remained some weak points in its evolutionary process, by which inefficiency of calculation is caused or unreasonable solutions are concluded. A new method through the usage of the contour lines is proposed in order to remove such defects of the usual ESO as well as to enable the structures to not only be scraped off but also grow up toward the final optimal structures. Numerical examples on the structural form creation for plane structures subjected to multiple loadings as well as shell structures are demonstrated so as to show the potential ability of the present method toward effective structural design tools.
2002-02-28