叶轮旋转机械机匣振动模态分析
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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.
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.
引文
[1]周杨娜,王国鹏,王闯.航空发动机机匣组件模态试验研究[J].测控技术,2013,32:72-81.
[2]李德葆.振动模态分析及其应用[M].北京:北京宇航出版社,1989.
[3]李玉宝,翟华,柯尊忠.薄壁圆筒零件变形的有限元法研究[J].合肥工业大学学报(自然科学版),2005,28(2):121-124.
[4]卢学军,李彦启,王开和,等.圆柱壳结构振动特性研究[J].天津科技大学学报,2005,20(2):35-37.
[5]吴元东,漆文凯.某发动机模拟机匣的模态分析与模型验证[J].机械科学与技术,2010,29(11):1487-1492.
[6]周杨娜,王国鹏,王闯.航空发动机机匣组件模态试验研究[J].测控技术,2013,32:72-81.
[7]栾文博,吴光强,徐炜卿.基于阶次跟踪的变速箱啸叫噪声分析[J].振动与冲击,2013,32(11):95-99.
[8]Liang Anyang,Huang Guoyuan,Zhang Yuetong,et al. Mode-ling and Dynamic Analysis for the Foundation of a Blade Rotor System[J]. Transactions of Nanjing University of Aeronautics&Astronautics,2017,34(3):326-332.
[9]禇志刚,夏金凤.机床整机试验模态分析[J].机械设计与研究,2014(6):106-108.
[2]李德葆.振动模态分析及其应用[M].北京:北京宇航出版社,1989.
[3]李玉宝,翟华,柯尊忠.薄壁圆筒零件变形的有限元法研究[J].合肥工业大学学报(自然科学版),2005,28(2):121-124.
[4]卢学军,李彦启,王开和,等.圆柱壳结构振动特性研究[J].天津科技大学学报,2005,20(2):35-37.
[5]吴元东,漆文凯.某发动机模拟机匣的模态分析与模型验证[J].机械科学与技术,2010,29(11):1487-1492.
[6]周杨娜,王国鹏,王闯.航空发动机机匣组件模态试验研究[J].测控技术,2013,32:72-81.
[7]栾文博,吴光强,徐炜卿.基于阶次跟踪的变速箱啸叫噪声分析[J].振动与冲击,2013,32(11):95-99.
[8]Liang Anyang,Huang Guoyuan,Zhang Yuetong,et al. Mode-ling and Dynamic Analysis for the Foundation of a Blade Rotor System[J]. Transactions of Nanjing University of Aeronautics&Astronautics,2017,34(3):326-332.
[9]禇志刚,夏金凤.机床整机试验模态分析[J].机械设计与研究,2014(6):106-108.