基于数值模拟的形状优化方法在冒口设计中的应用  

Application of Shape Optimization Based on Numerical Simulation in Feeder Design

作　　者：张丹[1] 张卫红[1] 李付国[2] 

机构地区：[1]西北工业大学中法并行工程实验室,陕西西安710072 [2]西北工业大学材料科学与工程学院,陕西西安710072

出　　处：《铸造》2004年第2期129-132,共4页Foundry

基　　金：国防基础科研项目(2001BF1011)资助。

摘　　要：基于数值模拟结果将结构优化领域中的形状优化方法应用于浇冒口的设计过程,建立设计、分析和优化的集成系统。针对铸造工艺建立了优化模型,并给出设计变量的灵敏度分析公式,首次利用全局收敛法(GCM)自动获取优化过程的搜索方向和搜索步长。最后给出一个冒口优化设计的算例,证明该优化模型和算法的可靠性,在保证铸件质量的同时达到了材料损耗最小的目的,实现了浇冒口系统参数的自动化设计。Based on the finite element solidification heat transfer analysis, this paper describes an application of a shape optimization technique to automatically improve the riser design in casting processes. A framework to design, analyze and optimize casting processes becomes established. A proper optimization model is formulated and the formulation of sensitivity analysis corresponding to design variables is given. A method of globally convergent method (GCM) originally devised for structural optimization is introduced for the first time, which is applied to catch search directions and steps automatically during optimization in sand mould casting for the first time. Then a test case is solved to validate and demonstrate the optimization procedure, which shows it is successful to guarantee the quality of casting and reduce the cost at the same time.

关 键 词：形状优化 冒口 灵敏度分析 全局收敛法(GCM) 

分 类 号：TG241[金属学及工艺—铸造]