基于模态分析的机床床身优化设计  

Structural Optimization Design of Machine Tool Bed Based on Modal Analysis

作　　者：王滕[1,2] 万熠[1,2] 梁西昌 靳一帆 刘战强[1,2] 

机构地区：[1]山东大学高效洁净机械制造教育部重点实验室 [2]山东大学

出　　处：《工具技术》2015年第6期40-43,共4页Tool Engineering

基　　金：国家自然基金资助项目(51175306);教育部新世纪优秀人才资助项目(NCET-11-0310);泰山学者专项基金资助项目

摘　　要：为提高平面光学元件抛光机床的加工精度,对其床身进行模态分析,得到机床结构固有的振动特性,实现对机床床身的优化设计。首先,通过3D建模软件构建机床模型,并将其导入ANSYS有限元软件中进行模态分析,得出机床的前几阶固有频率和振型;然后,根据模态分析结果对机床横梁和立柱进行优化设计,得出优化结构;最后,对优化后结构进行模态分析,并将结果与优化前分析结果进行对比。对比可得,优化后的机床床身前三阶固有频率分别提高15.61%、14.63%和16.07%,有效提高机床稳定性,提高工件加工精度。Modal analysis is carried out on the machine bed in order to improve the precision of polishing machine for optical components. Natural vibration characteristics of the machine structure are calculated and the optimal design of the machine bed is realized. Firstly, three dimensional model is developed and imported to ANSYS to obtain the first few natural frequencies and modes of vibration. Secondly, based on the results of modal analysis, the design of the beams and columns are optimized. Finally, comparison shows that after optimization the first three natural frequencies of the machine bed increase by 15.61%, 14.63% and 16.07% respectively, which improve the stability of machine and accuracy of work- piece effectively.

关 键 词：机床床身 固有频率 模态分析 振型 

分 类 号：TH16[机械工程—机械制造及自动化]