基于cv-FDM法的铸件凝固过程热应力数值模拟  

Numerical simulation of thermal stresses of castings during solidification process by cv-FDM

作　　者：吕宝佳[1,2] 康进武[1,2] 黄天佑[1,2] 

机构地区：[1]清华大学机械工程系,北京100084 [2]清华大学先进成形制造教育部重点实验室,北京100084

出　　处：《材料科学与工艺》2010年第6期862-867,共6页Materials Science and Technology

基　　金："高档数控机床与基础制造装备"科技重大专项资助项目(2009ZX04014-082)

摘　　要：为了实现铸件凝固过程多物理场的无缝耦合数值模拟,开展基于有限差分法的铸件凝固过程热应力分析.建立了热弹塑性的三维控制体积有限差分(cv-FDM)算法,开发了相应的铸件凝固过程热应力分析三维仿真软件.将该软件应用于典型的应力框试件和轧钢机机架铸件,计算得到了铸件凝固过程产生的应力和位移,并将结果与采用有限元分析软件ANSYS的计算结果进行了对比验证,吻合较好,表明模拟结果基于cv-FDM的铸件热应力分析达到了有限元法的精度水平.For the seamless multi-field coupled numerical simulation of castings during solidification process,the thermal stress analysis of castings based on finite difference method was carried out.A three dimensional control volume based finite difference method（cv-FDM） for thermal elastic model,and an analysis system for castings are established.The system is applied into the thermal stress analysis of a stress frame specimen and a mill housing casting.The displacement and stress results are obtained and compared with those acquired by software ANSYS,and they are in good agreement.This shows that the cv-FDM based thermal stress analysis reaches the same accuracy as ANSYS does

关 键 词：控制体积-有限差分法(cv—FDM) 数值模拟 热应力 铸件 

分 类 号：TG21[金属学及工艺—铸造]