某丙烷脱氢装置大型管道高频振动特性分析  

Research on high⁃frequency vibration of large pipeline of a propane dehydrogenation unit

作　　者：贺佳[1,2] 梁浩华 张国华 杨玉强 胡美妃 陈政清[1,2] HE Jia;LIANG Haohua;ZHANG Guohua;YANG Yuqiang;HU Meifei;CHEN Zhengqing(Key Laboratory for Wind and Bridge Engineering of Hunan Province,Changsha 410082,China;College of Civil Engineering,Hunan University,Changsha 410082,China;CsscSunrui(LuoYang)Special Equipment Co.,Ltd.,Luoyang 471002,China)

机构地区：[1]湖南大学风工程与桥梁工程湖南省重点实验室,长沙410082 [2]湖南大学土木工程学院,长沙410082 [3]中船双瑞(洛阳)特种装备股份有限公司,河南洛阳471002

出　　处：《振动与冲击》2025年第4期144-150,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(52278305)。

摘　　要：大型石化管道服役期间,受复杂工作环境影响,可能发生高频剧烈振动,影响结构正常使用,并存在较大的安全隐患,因此,很有必要对此类振动现象开展相关研究。以某丙烷脱氢装置的大型管道为对象,基于现场实测数据,分析了管道振动特性,并利用传递矩阵法,获取了管道内部不同工况下的气柱固有频率。研究发现:管道振动的加速度幅值大、位移幅值小,振动频率较高,且卓越频率之间存在明显的倍数关系,即倍频现象,如26 Hz和52 Hz;气柱固有频率与管道固有频率接近,结合压缩机的激励频率,引发了管道的共振现象。该研究采用的方法简便高效,可用于分析丙烷脱氢装置大型管道的振动特性,探求管道振动的原因,并为类似管道的性能评估和减振方案设计提供参考依据。During dehydrogenation operations,large⁃scale petrochemical pipelines are prone to high⁃frequency severe vibrations and significant noise pollution due to complex working environments,Whichaffects structural integrity and causes potential danger.Therefore,it is essential to study suchvibration phenomena and mechanisms.Inthis paper a large pipeline of a propane dehydrogenation unit was focused on,the vibration characteristics based on field measurement data was analyzed,and the transfer matrix method was usedto obtain the natural frequencies of the gas column under different working conditions.The resultsindicate that the pipeline has high vibration acceleration but low displacement,with a high frequency and a clear multiple relationship between the dominant frequencies,such as 26 Hz and 52 Hz.The natural frequency of the gas column is close to that of the pipeline,and the excitation frequency from the compressor leads to resonance.The proposed methodissimple and efficient,suitable for analyzing the vibration characteristics and causes of large⁃scale propane dehydrogenation pipelines in practical engineering,and can provide a reference for the performance evaluation and vibration reduction design of similar pipelines.

关 键 词：管道振动 倍频现象 气柱固有频率 传递矩阵法 

分 类 号：TE832[石油与天然气工程—油气储运工程] U441[建筑科学—桥梁与隧道工程]