100分求论文一篇:体成形数值模拟中的模具型腔、网格生成及接触搜索的一致描述

体成形数值模拟中的模具型腔、网格生成及接触搜索的一致描述

寇淑清　 杨慎华　 黄良驹　 傅沛福　

摘　要：以三次B样条曲面描述为基础，对体成形数值模拟中的复杂模具型腔、锻件三维网格自动划分、锻件与模具接触的状态进行了一体化研究。利用B样条曲面的直观性、局部性、通用性和造型灵活性，构造了复杂模具型腔及锻件边界，提出了三维网格样条生成法、改进的分块样条生成法及接触判断区域层次搜索技术。
关键词：有限元；B样条；曲面描述；网格生成；接触搜索
分类号：TG376　文献标识码：A
文章编号：1002-378X(2001)01-0019-06

Compatible Description of Tool Surfaces, FEM Mesh Generation and Contact Search for Simulating Complicated Massive Forming

KOU Shu-qing（Institute of Rolling Forging Technology, Jilin University, Nanling Campus, Changchun 130025, China）　
YANG Shen-hua（Institute of Rolling Forging Technology, Jilin University, Nanling Campus, Changchun 130025, China）　
HUANG Liang-ju（Institute of Rolling Forging Technology, Jilin University, Nanling Campus, Changchun 130025, China）　
FU Pei-fu（Institute of Rolling Forging Technology, Jilin University, Nanling Campus, Changchun 130025, China）　

Abstract：The 3-D tool surface description together with the automatic 3-D meshing methods and the contact search is carried out for the FEM numerical simulation of complicated massive forming based on the cubic B-spline. The complex geometry for die-cavity and forging surface is described; the spline technique for 3-D mesh generation as well as piecewise mesh generation is proposed and the region-section search algo rithm is done for the advantages of B-spline such as visualization, localization, generalization, flexibility and adaptation for graphic model.
Keywords：finite element; B-spline; curved surface description; mesh generation; contact search