基于改进粒子群算法的大型薄壁加筋结构多点协调校形优化方法研究  

Multi-point Coordinated Calibration Optimization Method for Large Thin-walled Stiffened Structure Based on Improved Particle Swarm Optimization

作　　者：邹建锋 余海东[1] 来新民[1] ZOU Jianfeng;YU Haidong;LAI Xinmin(Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structure Technology,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240

出　　处：《机械设计与研究》2020年第3期122-128,共7页Machine Design And Research

基　　金：国家自然科学基金资助项目(51775345);飞机后段自动精准对合技术与成套装备(2014ZX04001081)。

摘　　要：大型薄壁加筋结构局部非均匀造成加工成形后存在翘曲变形,在装配前确定校形点的位置和校形量是降低装配应力、减小装配偏差的关键。提出了一种用于多点协调校形的校形点寻优方法,基于有限元仿真、坐标映射和双线性插值的方法,建立包含任意校形位置和校形量对应变形结果的数据库,以校形后薄壁结构型面偏差的均方根值最小为目标函数,基于改进粒子群算法迭代求解最优校形点位置及其校形量,研究大型薄壁加筋结构校形点数量对校形后偏差的影响,确定不同偏差模式下的薄壁结构的最优校形点数量,研究三种典型偏差模式下大型薄壁加筋结构的校形点选取结果和最终校形效果,验证了该方法的有效性。The local non-uniformity of the large thin-walled stiffened structure causes warpage after processing.Determining the position and the correction amount of the correction points before assembly is the key to reduce assembly stress and assembly deviation.A correction points optimization method for multi-point coordination calibration is proposed in this paper.Based on the finite element simulation,mapping of coordinate and bilinear interpolation method,a database containing the deformation results of arbitrary correction positions and correction results is established.The minimum root mean square value of the thin-walled structure surface deviation serves as objective function.The improved particle swarm optimization algorithm is used to optimize the correction points’position and correction amount.The influence of the number of correction points on the deviation after calibration is studied.And the number of optimal correction points under different deviation modes is determined.The selection results of correction points and the final calibration effects of large thin-walled stiffened structures under three typical deviation modes are studied.This verifies the effectiveness of the proposed method.

关 键 词：薄壁加筋结构 校形 双线性插值 改进粒子群算法 偏差模式 

分 类 号：TH113[机械工程—机械设计及理论]