基于惯性能量分布的机床动态特性分析及优化  

Dynamic characteristic analysis and optimization of machine tool based on inertial energy distribution

作　　者：胡世军[1] 李治翔 Hu Shijun;Li Zhixiang(College of Mechanical and Electrical Engineering,Lanzhou University of Technology, Gansu Lanzhou, 730050, China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《机械设计与制造工程》2021年第2期65-69,共5页Machine Design and Manufacturing Engineering

摘　　要：首先基于一台立式加工中心的模态及谐响应分析结果确定立柱为整机的薄弱环节。其次将整机划分为可动与不可动两个子结构,通过计算两个子结构惯性能量的分布,提出了一种基于惯性能量平衡原理的优化方法。再次以立柱的第1,2,5阶模态频率之和为优化函数,利用MATLAB优化工具箱得到了优化结果。结果显示在底座、立柱子结构质量基本不变的情况下,惯性能分布比例有一定改善,谐响应幅值有所下降,动态性能得到了提高。Based on the results of modal and harmonic response analysis of a vertical machining center,the column is determined as the weak link of the whole machine.The whole machine is divided into two substructures,movable and immovable.By calculating the distribution of inertia energy of the two substructures,an optimization method of inertia energy balance principle is proposed.Taking the maximum sum of the first,second and fifth order modal frequencies of the column as the optimization objective,and the structural parameters of the column as the optimization object,the optimization results are obtained by using MATLAB optimization toolbox.The results show that the distribution ratio of inertia energy is improved,the amplitude of harmonic response is decreased,and the dynamic performance is improved.

关 键 词：子结构 惯性能 动态特性 结构优化 

分 类 号：TH111[机械工程—机械设计及理论]