设计研究 Design&Research
离心压缩机出口管道声学振动分析陆美彤，张
帆，孙学军”，何嘉欢3，杜义朋“
(1.中国石油大学（北京）油气管道输送安全国家工程实验室，北京102249；2.中国石油天然气管道工程有限公司，河北廖坊065000； 3.中国石油管道公司，河北席坊065000；4.中油管道投产运行公司，河北廊坊065000)
[摘
要)：压编机的进出口管线对受力的要求十分严格，压缩机出口管线是出现振动的最常见部位，固此关于压缩机出口管
线振动的研究尤为重要。利用大型有限元分析软件ANSYS对离心压缩机出口管系的部分管段进行声学振动分析，计算出气柱围有频率，并与转移短阵法进行对比，验证有限元方法可行性。以某压缩机站场的实际问题为例，介绍软件的应用及气柱圈有频率计算方法，并计算热旁通支管处的涡风频率，分新管道产生气拉共振现象的可能及危害，最终提出减小声学共振的切实有效方法。
[关键调]：离心压缩机；振动；声学分析
中图分类号：TH452
文献标志码：A
文章编号：1006-2971(2015)02-001806
AcousticAnalysisoftheVibrationinOutletPipelineof CentrifugalCompressor LU Mei-tong',ZHANG Fan', SUN Xue-jun', HE Jia-huan',DU Yi-peng
(1. The Nastional Engineering Laboratory of Oil & Gas Pipeline Transportation Safety, China University of Petroleum (Beijing), Beijing 102249, Chins; 2. Chins Petroleum Pipeline Engineering Corporation, Langfang 065000, China; 3. PetroChins Pipeline Company, Langfang 065000, China; 4. PetroChins Pipeline Operation Company, Langfang 0650, China)
Abstract:The import and export pipelines of compressor are very striet to the requirement of stress, moreover the vibration of export pipelines often occur in service, So it is particularly important to research on outlet piping vibration of compressor. This paper, by us ing large scale finite element analysis sofrware ANSYS, makes acoustic vibration analysis of centrifugal compressor outlet piping. Then the gas column natural frequency is caleulated, and compared with the transfer matrix method, the feasibility of the finite ele ment method is illustrated. With an example to practical problem of a compressor station system, the application of software and the column calculating natural frequency method is introduced, the eddy frequency of hot bypass manifold is caleulated, and the possibil ity of column resonance and harm of the phenomenon is analyzed. Finally the effective and feasible method to reduce the acoustic resonance is put forward.
Key words: centrifugal compressor; vibration; acoustic analysis
引信言 1
由于离心压缩机运转平稳、连续等特点，广泛应用于石油天然气管道中。与往复压缩机管道的振动不同，离心压缩机管道的振动主要是管内流体流经三通、阀门等位置产生涡流导致的声学振动，具有很强的不确定性和复杂性。随着对管输需求量的增加及输量变化灵活性的要求，导致
收稿日期：2014-1203 18/Camprasom
压缩机技术
流致振动问题经常出现，而一且管线建成后，对于声学振动的问题难以通过简单的改变管系结构来解决，为此，有必要对离心压缩机管道进行专门的声学分析。
声学分析理论 2
压缩机出口管道内部空间是由管壁围城的，内部充满输送的天然气介质。同任何其它系统样，该空间同样拥有固定的模态频率和模态形状。
2015年02期（总第250期）