修正最適性基準法を用いたトポロジー最適化によるミーゼス応力最小化構造の最適設計

抄録

In this study, we performed density-based topology optimization for minimizing von Mises stress. Density-based topology optimization is often employed the optimality criteria (OC) method for design variable update equation. However, the OC method also has several problems. We developed a modified OC method based on the concepts of the conventional OC method and Newton’s method. In the results of the topology optimization analysis for minimizing strain energy using the modified OC method, the number of iterations and parameters settings have been reduced and the dependence on parameter settings has been pursued. Therefore, the modified OC method is also employed for topology optimization to minimize equivalent stress. As a result, in three dimensional von Mises stress minimization problems, it was also found that setting a move-limit not only worsen the rate of descent of the performance function, however also has the effect of creating more grayscale within the density distribution.