摘要
以刚黏塑性有限元为基础,采用基于灵敏度分析的正向模拟优化法,以直接设计预成形模具形状为目标,提出并建立了一种控制变形力的灵敏度分析理论和模具形状优化设计方法。给出了目标函数的表达形式,确定了优化设计变量,推导了目标函数对优化设计变量的灵敏度,利用FORTRAN语言开发了变形力预成形优化设计程序,并对一平面应变变形的H形锻件进行了预成形优化设计,得到了目标函数及终锻件Y向应力分布随优化迭代次数的变化情况。
In order to control the deforming force during the forging process, a new sensitivity analysis method for preform die shape design based on the rigid visco--plastic finite element method was put forward. The optimization goal was to minimize the deforming force during the forging process through changing the preform die shape. The form of the objective function was given. The optimization design variables were also determined. The sensitivity equations of the objective function with respect to the design variables were developed. Using the FORTRAN programming language, the optimization software was developed and the preform die shape of an H--shaped forging process in plane strain deformation status was optimized. The changes of the objective function and y-- stress distribution of the forging during the optimization iteration were given.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2008年第12期1496-1499,共4页
China Mechanical Engineering
基金
山东省自然科学基金资助项目(Y2006F11)
山东省博士后择优资助项目(200603034)
