はみ出しを有する重合メッシュ法による構造物・地盤一体モデルの効率的モデリング

抄録

This study shows the modeling procedure for integrated structure-soil models by nonconforming meshes. Nonconforming meshes are modeled by s-version finite element mesh superposition method (s-FEM) with mesh protrusions. The s-FEM can combine 2 nonconforming meshes by adding unique boundary conditions to maintain the continuity of displacement in an analytical model. In order to derive the validity and the index of highly accurate modeling of the proposed technique, three analysis examples are presented in this paper. In the static analysis, the principal stresses and nodal displacements of the nonconforming mesh coincided with the corresponding reference results calculated by FEM with fine mesh. In the second example,the eigenvalues and eigenvectors calculated by the proposed method were in good agreement with the reference solution. It has been confirmed that the condition of mesh superposition affects the analytical accuracy in the time history response analysis.