摘要
引入响应面方法和遗传算法建立基于近似模型的拉延筋几何参数反求方法。首先以等效拉延阻力为设计变量,通过均匀拉丁方试验设计方法提取适当的设计参数样本构造响应面近似模型,并不断优化响应面模型,获取最优等效拉延阻力;然后以最优等效拉延阻力为约束条件,结合等效拉延阻力计算和小种群遗传算法反求拉延筋几何参数。整个反求过程采用等效拉延筋有限元模型进行仿真计算,避免有限元模型的网格重划分及由真实拉延筋模型引入的计算效率问题。数值算例表明,基于近似模型的拉延筋几何参数反求方法可在设计兴趣域内快速寻优,有助于加快模具设计进程,降低生产成本。
A method for the optimization of the drawbead geometrical parameters was built,which was based on the response surface method and genetic algorithm. The first approach was for an optimization of the restraining forces with the region of the interest moved across the design space and the uniform latin square designs of experiment. In the second one, the equivalent drawbead model was combined with Micro-μGA algorithm to optimize geometrical parameters of the drawbeads. In addi tion, the obtained optimization procedure was very efficient due to the employment of equivalent drawbead model which avoids rerneshing. The square cup of Numisheet 93 was presented to demonstrate the usefulness of the proposed optimization procedure for the design of mould.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2006年第19期1988-1992,共5页
China Mechanical Engineering
基金
国家重点基础研究发展计划资助项目(2004CB719402)
教育部跨世纪优秀人才计划资助项目
关键词
拉延筋
参数反求
响应面方法
移动最小二乘
小种群遗传算法
drawbead
inverse problem of parameter
response surface method
moving least square approximation
micro μGA
