基于NURBS的动态接触边界算法研究  

Research on the Algorithm of Dynamic Contact Boundary Based on NURBS

作　　者：郝艳飞[1] 刘建生[1] 安红萍[1] 

机构地区：[1]太原重型机械学院材料分院,太原030024

出　　处：《太原重型机械学院学报》2003年第4期265-269,共5页Journal of Taiyuan Heavy Machinery Institute

基　　金：山西省自然科学基金(项目编号:20001052)

摘　　要：采用非均匀有理B样条(NURBS)方法描述模具型腔曲线,系统地分析了基于NURBS法的工件与模具动态接触过程的变化机制,并提出了相关算法。通过H型锻件成形的模拟,证实了相关算法的可行性。从而验证了NURBS法对提高塑性有限元软件的通用性和模拟精度有重要作用。Non-Uniform Rational B-Spline (NURBS) is used to describe the curves of die cavity in this paper, and the treatment of the dynamic contact boundary between a workpiece and its die is emphatically researched. Then a relative algorithm is developed. By simulating the forming of H-shaped forging, the feasibility of relative algorithm is verified. It is also proved that the versatility and reliability of NURBS method is better than those of algebraic description method for improving precision of numerical simulation.

关 键 词：NURBS 数值模拟 动态接触 非均匀有理B样条 模具 有限元 

分 类 号：TG76[金属学及工艺—刀具与模具] TB115[理学—数学]