基于多目标的SPFRAG车床床身结构优化设计  

Optimization design of SPFRAG lathe bed structure based on multi-objective

作　　者：乔雪涛[1] 曹康 李优华 周世涛 盛坤 张洪伟 QIAO Xuetao;CAO Kang;LI Youhua;ZHOU Shitao;SHENG Kun;ZHANG Hongwei(School of Mechatronics Engineering,Zhongyuan University of Technology,Zhengzhou 450007,CHN)

机构地区：[1]中原工学院机电学院,河南郑州450007

出　　处：《制造技术与机床》2023年第9期146-153,共8页Manufacturing Technology & Machine Tool

基　　金：河南省科技攻关项目(202102210276,212102210318)。

摘　　要：为探索提高机床综合性能的新途径,提出了采用钢-聚丙烯纤维增强人造花岗岩复合材料(steel-polypropylene fiber reinforced artificial granite,SPFRAG)代替铸铁制作机床床身的方案。以某车床床身为基础,运用中心复合实验设计法和Kriging插值法建立响应面模型,通过对各设计变量进行灵敏度分析确定权重占比;基于多目标遗传算法(multi-objective genetic algorithm,MOGA),以床身质量和一阶固有频率为约束条件、以最大总位移变形量和最大等效应力为优化目标,对复合材料床身结构进行了设计,并对优化后的床身结构经有限元软件进行动静态性能分析。结果表明:SPFRAG床身静、动态特性均优于铸铁床身,为复合材料床身结构设计提供了理论依据。In order to explore a new way to improve the comprehensive performance of machine tool,a new method of using steel-polypropylene fiber reinforced artificial granite composite(SPFRAG)instead of cast iron to make lathe bed is put forward.The SPFRAG bed structure was redesigned on the basis of a lathe bed,and the response surface model was established by using Kriging interpolation method,and the weight proportion was determined by sensitivity analysis of each design variable,based on the multi-objective genetic algorithm(MOGA),the optimization of the bed structure is carried out with the constraints of the bed mass and the first natural frequency,and with the maximum total displacement and the maximum equivalent stress as the optimization objectives.The results show that the static and dynamic characteristics of SPFRAG bed are better than those of cast iron bed,which proves the feasibility of the scheme.

关 键 词：钢-聚丙烯纤维 人造花岗岩 车床床身 中心复合实验设计 多目标优化 

分 类 号：TG519.3[机械工程—精密仪器及机械]