板料成形有限元模拟中自适应三角形网格的研究

Research on adaptive triangular mesh algorithm in sheet metal FEM simulation

针对非规则几何区域的有限元网格剖分,提出了栅格法与推进法结合的新的三角形自适应剖分算法、三角形单元网格的动态自适应加密和聚合算法和基于板料模具穿透量的加密判据和基于法矢量的聚合判据,实现了空间三角形单元网格的划分、自适应加密、动态聚合和重划分。

A new self-adaptive triangular mesh algorithm for irregular surface meshing, combining both AFT and Grid-Based methods was put forward. Refining algorithm and dynamic coarsening algorithm of triangle element mesh were also proposed. Triangular meshing, dynamic refining and remeshing were achieved based on criterions of penetration amount and normal vector.