1226 構造・流体が強く連成する問題のための拡張型Mesh Update法とその応用(G01-1 計算力学の展開,G01 計算力学)

概要

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We introduce a robust mesh update scheme on FSI problem where a fluid region is subjected to large deformation. As a starting mesh, we prepare a micro-size mesh, named mother model, which has the same geometry to analysis region. Then we move the surface nodes to adjust boundary configuration and relocate the internal nodes in the way satisfied by Laplace equation. During consecutive deformation steps, we compute a following mesh based on not current configuration but original mother mesh. It may possible to require a single mesh throughout whole processes undergoing large deformation. We might save the cost of replacing the meshes when mesh is distorted heavily. It does not affect the element connectivity so that we require only one time inversion of stiffness equation. It suggests us that the selection of adequate mother model from a variety of prepared configuration leads to an idea of a conventional mesh generator. Once we create the library consists of a set of micro-mother model and corresponding standard analysis model, it is easy to get the modified geometry mesh from standard one.
一般社団法人日本機械学会の論文
2007-09-07