叶轮旋转机械机匣振动模态分析  

Modal Anslysis of Casing of Blade-Rotor Test Rig

作　　者：黄国远 梁安阳 岳林[1] HUANG Guoyuan;LIANG Anyang;YUE Lin(College of Mechanical and Electrical Engineeering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机械制造与自动化》2019年第1期117-120,152,共5页Machine Building & Automation

摘　　要：机匣是叶轮旋转机械的重要组成部件,其振动特性直接关系着旋转机械的工作性能。忽略安装边孔等不规则附件结构,机匣最终可简化为一个薄壁圆筒结构。以某试验台薄壁圆筒机匣为研究对象,在运行激励下进行预试验,利用阶次分析识别其振动频率,为有限元机匣模态分析提供参考;通过有限元分析,得到机匣振动频率与振型;采用锤击法试验模态分析方法验证旋转机械机匣模态分析仿真结果的有效性。The casing is an important component of the impeller rotating machine,and its vibration state directly affects the workingt performance of the rotating mechanism.Except for the irregular attachment structure with edge and holes,the casing can be simplified as a thin-walled cylinder structure;A blade-rotor test rig case is taken as object of study.The order analysis algorithm is used to identify the vibration frequency under the incentive,the reference is given to the finite element modal analysis of case.And this analysis is used to obtain the natural frequency and mode of the casing.The effectiveness of the simulation results of the modal analysis of the rotating machine is verified by the hammer test method.

关 键 词：叶轮旋转机械 机匣 运行激励 模态分析 模态试验 

分 类 号：TH133[机械工程—机械制造及自动化]