摘要
选用反向法计算冲压件毛料外形 ,开发了独立的有限元源程序 ,提出了一种求算毛料初步解方法———投影均值法 ,该方法提高了程序的收敛性和稳定性。假定压边力作用在凸缘区外边缘节点上 ,根据通过某节点的单元边的长度调整该节点处压边力的大小 ,简化了程序且有一定的合理性。程序运行稳定 。
Inverse Approach has been adopted to calculate the blank shape for sheet metal forming and independent finite element program has been developed. A simple and effective method, named projecting and average method, has been proposed to obtain an initial value for blank shape, which is better than that from other method such as geometric method and trial and error method. Thus the convergence of the program has been improved greatly. The blank holding force has been applied to the nodes on the outer edge of the flange, and its magnitude at one node has been adjusted according to the length of elements edge that contained the node. It not only simplifies the program, but is reasonable as well. The program is stable and can be used to obtain the blank shape of a square cup with high precision effectively and rapidly.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2003年第9期788-790,共3页
China Mechanical Engineering
基金
国家 8 63高技术研究发展计划资助项目 ( 863 -5 11-82 0 -0 2 0 )
