機械構造形状の軽量化計画 : 荷重形態に対応する多連結構造の創成

概要

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Design method of topology and boundary shape of multiconnected plane structure, generated corresponding to arbitrary load conditions, is developed to lighten the weight of the structure. For creation of topology and boundary shape of a minimal weight structure, the layout of hollow spaces in the interior of the structure must be optimized. In the method, the structure divided into discrete square elements is analyzed by a finite-element method and the elements are detached and attached on the structure according to the sensitive function calculated by the difference of total strain energy in the structure. The topology and the boundary shape are modified by the successive approximation in steepest descent of the sensitive function. Numerical results demonstrate that the method can produce the topology and the boundary shape of the multiconnected structure as a frame. By the structural shape optimization for minimal weight, the computed final structures are modified to the construction of bars under nearly uniaxial tension. The structural shapes of well-approximated minimal weights are obtained under many load conditions.
一般社団法人日本機械学会の論文
1994-03-25