二维弹塑性有限元程序全自动重分  

Fully Automatic Rezoning for Elastic-plastic Finite-element Program in 2D

作　　者：李恩征[1] 张风国[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《爆炸与冲击》2001年第4期241-247,共7页Explosion and Shock Waves

摘　　要：对二维弹塑性流体力学有限元计算中的非结构三角网格 ,提出了一种简单、实用的全自动网格重分方法。并在LTZ 2D程序上编制了全自动重分模块 ,重分使拉格朗日流体程序能计算包含大变形的一些问题。给出两个算例 ,圆柱体撞击 (Taylor实验 )和射流形成 ,通过网格重分数值计算结果与实验和文献结果比较 ,定性。A simple and useful fully automatic grid-rezoning method, for unstructured triangular grids in the 2D finite-element computation of elastic-plastic-fluid mechanics, is presented. A new fully automatic rezoner algorithm is compiled based on the code LTZ-2D. Rezoning enables Lagrangian hydrocodes to compute problems involving larger deformations. Two examples for the computation of cylinder impact (Taylor test) and jet formation are provided. The results are in good agreement with both experiments and corresponding reference qualitatively and quantitatively.

关 键 词：拉氏有限元 非结构三角网格 守恒重映 全自动重分 二维弹塑性流体力学 

分 类 号：O35[理学—流体力学] O241.82[理学—力学]