采用B样条曲线进行边界重分划

Re-Cutting the Boundary by B-spling fitting Method

在金属成形数值模拟过程中 ,坯料网格边界不断变化 ,当使用网格向前推进技术产生网格时必须对旧的边界进行重新分划。本文给出了B样条曲线拟合边界的办法 ,实现了对边界的自动重新分划。

During the numerical simulation for metal forming ,the boundary of billit meshes are usually moving.The old boundary must be re cutted when the new meshes are generated by the front generation technique.In this paper,uniform cubic B splines are used to fit the boundary,the boundary is re cutted automatedly.This method is proved to be simple and reliable by some examples.