基于ABAQUS的三轴立式镗铣加工中心动态特性分析  

Dynamic Characteristics Analysis of Three-axis Vertical CNC Boring-Milling Center Based on ABAQUS

作　　者：刘志威[1] 李航[1] 刘丽丽[1] 

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003

出　　处：《机床与液压》2015年第9期117-119,164,共4页Machine Tool & Hydraulics

基　　金：河南省基础研究与前沿技术基金项目(082300413204)

摘　　要：以辛辛那提750为例,研究三轴立式镗铣加工中心的动态特性,根据有限元模型分析方法建立模型后进行模态特性分析机床各阶振动模态的特点,找到了机床结构上薄弱环节;在此薄弱环节上选取一点进行谐响应分析,计算出机床上最大激振力误差以及相应的特征频率。结果表明:机床结构的主轴箱位移量较大,激振力频率与机床结构第十阶固有频率接近时容易发生共振。By taken the Cincinnati 750 as an example,the dynamic characteristics of the three-axis vertical CNC boring-milling center were researched. When a model was established in accordance with the analytical method of finite element model（ FEM）,modal analysis was then conducted to obtain characteristics of each vibration mode of the machine tool,and the weakness in structure of the machine tool thereby was located. One point on the weak part was selected to perform harmonic response analysis,and the maximum excitation force error of the machine tool and its corresponding characteristic frequency were calculated. The results show that with relatively large displacement of the spindle box,resonance is prune to occur when frequency of the excitation force approaches natural frequency of the 10 thmode of the machine tool structure.

关 键 词：模态分析 谐响应分析 特征频率 ABAQUS 三轴立式镗铣 

分 类 号：TH164[机械工程—机械制造及自动化]