基于有限差分网格的发动机缸体铸件热应力模拟  

Thermal Stresses Analysis of An Engine Cylinder Block Casting Based On Finite Difference Meshes

作　　者：朱慧[1] 康进武[1] 黄天佑[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《铸造技术》2005年第7期618-621,共4页Foundry Technology

摘　　要：对发动机气缸体铸件从浇注完到开箱落砂后的铸造过程应力场进行计算机数值模拟。为了实现形状复杂铸件的热应力分析,应用了有限差分网格向有限元网格的转换方法,得到缸体的有限元模型,并将该模型与经过大量简化后直接剖分得到的有限元模型进行了比较。在此有限元模型的基础上,采用FDM/FEM集成铸件热应力分析系统实现了对发动机缸体铸件热应力分析,模拟结果和实际生产情况相吻合。The numerical simulation of thermal stresses and deformation of an engine cylinder block casting was carried out by FDM/FEM integrated system. To get its thermal stresses analysis, the finite difference meshes were converted into finite element meshes. The finite element meshes are compared with the directly meshed finite element model after a lot of simplification. The results are in good agreement with the practical experience.

关 键 词：气缸体 有限差分网格 有限元网格 网格转化 热应力分析 

分 类 号：TG24[金属学及工艺—铸造]