2504 グレースケールフリートポロジー最適化のための高品質ゼロレベル境界追跡メッシュ作成法(設計と最適化IV)

Abstract

Topology optimization is one approach of structural optimization, where various and complex shape can be represented. Because of its degree of freedom, topology optimization has potential to yield superior designs compared with sizing and shape optimizations. However, grayscale elements are often yielded, especially, in density based topology optimization methods; they influenc negatively on design problems where Dirichlet boundary conditions are imposed on the design boundary. To achieve grayscale-free topology optimization, we proposed a boundary tracking type level-set topology optimization method for three-dimensional problem in previous studies. However, the three-dimensional zero-level boundary tracking mesh often contains extremely-low quality elements, and these elements influenc negatively on finit element computation. To avoid this problem, we need a new algorithm to generate the high quality zero-level boundary tracking mesh. In this study, we propose a new mesh generation method for high quality zero-level boundary tracking mesh.