焊接平台龙门架结构轻量化设计  

Welding Platform Gantry Structure Lightweight Design

作　　者：陈国雄 曹阳[1,3] 吴家雄 张大斌 CHEN Guo-xiong;CAO Yang;WU Jia-xiong;ZHANG Da-bin(College of Mechanical Engineering,Guizhou University,Guzhou Guiyang 550025,China;China Construction Fourth Engineering Bureau Installation Engineering Co.,Ltd.,Guizhou Guiyang 550000,China;Guizhou Engineering Technology Research Center for Electromechanical Equipment,Guizhou Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]中建四局安装工程有限公司,贵州贵阳550000 [3]贵州省机电装备工程技术研究中心,贵州贵阳550025

出　　处：《机械设计与制造》2024年第4期194-199,共6页Machinery Design & Manufacture

基　　金：贵州省科技计划项目(黔科合平台人才[2019]5616号)。

摘　　要：针对按经验法设计得到的焊接平台龙门架结构存在质量偏大和隔振能力较弱的问题,提出了一种基于有限元法—近似模型—遗传算法三者结合的多目标优化方法。通过对龙门架进行静力学与模态分析研究,获得了龙门架存在刚度与强度冗余的信息;以质量、最大静变形量、最大等效应力和1阶模态频率为性能指标,龙门架上7个尺寸参数为设计变量,选用中心复合试验设计对龙门架结构进行7因素5水平的仿真试验;根据响应面法构建近似模型代替龙门架有限元仿真模型,采用遗传算法对龙门架结构进行多目标求解优化。研究结果表明:优化后龙门架质量减少了7.34%,最大静变形量增加了0.0434mm,最大等效应力增加了4.16MPa,1阶模态频率提高了1.22Hz,有效避开了共振频率范围,隔振能力明显提升,可满足焊接平台的设计要求。Aiming at the problems of large mass and weak vibration isolation ability of the welded platform gantry structure de-signed by empirical method,a multi-objective optimization method based on the combination of finite element method,approxi-mate model and genetic algorithm was proposed.Through the statics and modal analysis of the gantry frame,the information of stiffness and strength redundancy was obtained.The mass,the maximum static deformation,the maximum equivalent stress and the first order modal frequency were taken as the performance indexes,and the seven dimensional parameters on the gantry frame were taken as the design variables.The central composite test design was selected to carry out the simulation test of the gantry frame structure with seven factors and five levels.The finite element simulation model of the gantry frame was replaced by an ap-proximate model based on response surface method,and the multi-objective optimization of the gantry frame structure was car-ried out by using genetic algorithm.The results show that after optimization,the weight of the gantry frame is reduced by7.34%,the maximum static deformation is increased by 0.0434mm,the maximum equivalent stress is increased by4.16MPa,the first or-der modal frequency is increased by1.22Hz,avoiding the resonance frequency range,and the vibration isolation ability is im-proved obviously,which can meet the design requirements of the welding platform.

关 键 词：焊接平台 龙门架 灵敏度分析 响应面法 多目标优化 

分 类 号：TH16[机械工程—机械制造及自动化] TH12[金属学及工艺—金属切削加工及机床] TG68