402 境界要素法による最適構造設計法(オーガナイズドセッション : 計算力学と構造最適化)

概要

論文の詳細を見る
This paper presents a calculation method of optimum structural design for satisfying simultaneously both topology optimization and shape one using boundary element method (BEM). BEM is usually available for shape optimization, because it deals with boundaries and gives high accuracy of surface stresses. However, BEM is not applicable to topology optimization. If a method for topology optimization is developed based on BEM, then it is possible to execute optimum structural design for satisfying simultaneously both topology optimization and shape one. An initial shape in the shape optimization process is modified iteratively by movements of boundary nodes on the surfaces. Each amount of the movement of the nodes is determined according to a strain energy value at the nodes. Then, this method makes holes in the internal domain according to a strain energy value at the internal points. Next, topology optimization is executed by movement of nodes on holes boundaries. The quadratic element is adopted for the improvement of accuracy in the boundary element analysis. Finally, the validity of this method is confirmed from the two-dimensional boundary element model of cantilever beam.
一般社団法人日本機械学会の論文
2000-09-08