基于遗传算法的带筋壁板条带激光喷丸成形工艺优化研究.pdf

上海航天
AEROSPACE SHANGHAI
第34卷2017年第1期
文章编号:1006-1630(2017)01-0032-05
基于遗传算法的带筋壁板条带激光
喷丸成形工艺优化研究
杨荣雪2,胡蓝,胡永样2,姚振强2
(1.上海交通大学机械与动力工程学院,上海200240;2.上海交通大学机槭系统与
振动国家重点实验室,上海200240;3.上海航天设备制造总厂,上海200245)
摘要:为实现带筋壁板条带激光喷九成形目标曲面,对基于遗传算法的激光喷九条带分布工艺优化方法进
行了研究。建立了固有应变的带筋整体壁板有限元模型,将条带的优化转换为仿真所获曲面与理想目标曲面偏差
最小问题,用遭传算法对喷九条带宽度与间隔进行优化,给出了优化流程,以及遠传算法操作参数的设置。以单筋
璧板成形圆柱面为实例,实现了其条带分布优化,获得成形曲面曲率半径与目标圆柱半径偏差为1%,对应节点最
大距离0.0033mm。优化结果表明:遠传算法可较好地适应本优化问题中目标函数难求导的状况,同时执行多方
向搜索提高了优化效率。
关键词:带筋壁板;激光喷丸成形;条带喷九;固有应变;参数优化;有限元建模;遗传算法;曲面
中图分类号:TN249:"TG68文献标志码:A
DOI1:10.19328/j. cnki.1006-1630.2017.01.005
Optimization of Strip Laser Peen Forming by Genetic Algorithm for Stiffener Integral Panels
YANG Rong-xue2, HU Ian, HU Yong-xiang, YAO Zhen-qiang
(1. Schoo] of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;
2. State Key Iaboratory of Mechanical System and Vibration, Shanghai Jiao Tong University
Shanghai, 200240, China; 3. Shanghai Aerospace Equipments Manufacturer, Shanghai, 200215, China)
Abstract: To obtain the specified surface, the layout optimization of the peening strip in strip laser peen forming
based on genetic algorithm was discussed. The finite element model of stiffener integrad panel with inherent stain
was established. The layout optimization was transferred to the problem of minimum deviation between the curved
surface obtained by simulation and the ideal curved surface. The width and distance of peening strip were optimized
by genetic algorithm. The optimization flowchart was given. And the parameters were set for genetic algorithm
operation. A unidirectional stiffener integral panel forming cylindrical shape was taken as an example and its optimal
layout was realized by this approach. It was 1% deviation of curvature radius between simulated curve and target
cylinder and the maximum distance between the corresponding nodes was 0.0033 mm. It demonstrated that genetic
algorithm was effective to solve the difficulty with the derivation problem of objective function, and improved the
optimizing efficiency by searching candidate solutions multi-orientatedly
Keywords: stiffener integral panel; laser peen forming; strip peening; inherent stain; parameter optimization
finite element modeling; genetic algorithm; curved surface
引言
轻、承载效率高的优点,正越来越多地用于航空航天
整体壁板作为一种溥壁加筋结构,其蒙皮、加强设计制造领域。条带激光喷丸成形具有高应变
凸台、筋条等结构要素间无任何机械连接,具有质量率效应,能产生幅度和深度更大的残余压应力场,故
收稿日期:2016-09-18;修回日期:2016-11-21
基金项目:国家自然科学基金而上项目资助(51375305);航天先进技术联合研究中心技术创新项目资助( USCAST2015-26)
作者简介:杨荣雪(1992),女,硕土生,主要从事激光加工研究
万方数据