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  

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

作　　者：寇淑清[1] 杨慎华[1] 黄良驹[1] 傅沛福[1] 

机构地区：[1]吉林大学南岭校区辊锻工艺研究所,吉林长春130025

出　　处：《吉林工业大学自然科学学报》2001年第1期19-24,共6页Natural Science Journal of Jilin University of Technology

基　　金：国家"九五"科技攻关资助项目! (96 A2 2 0 3 0 2 )

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。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 algorithm is done for the advantages of B spline such as visualization,localization,generalization,flexibility and adaptation for graphic model.

关 键 词：有限元 B样条 曲面描述 网格生成 接触搜索 模具型腔 锻造 

分 类 号：TG315.2[金属学及工艺—金属压力加工]