埋地对聚乙烯燃气管道泄漏声信号的影响分析  

Analysis on the influence of burial on polyethylene gas pipeline leakage sound signal

作　　者：江一凡 俞跃[2] 胡斌[2] 梁晓瑜[1] JIANG Yifan;YU Yue;HU Bin;LIANG Xiaoyu(College of Metrology Measurement and Instrument,China Jiliang University,Hangzhou 310018,China;China Special Equipment Inspection and Research Institute,Beijing 100029,China)

机构地区：[1]中国计量大学计量测试与仪器学院,浙江杭州310018 [2]中国特种设备检测研究院,北京100029

出　　处：《中国测试》2024年第11期33-39,共7页China Measurement & Test

摘　　要：为探究埋地聚乙烯燃气管道的管壁泄漏声信号特性及土壤对泄漏声信号的影响,对埋地管道泄漏声的产生机理、泄漏气体能量损耗规律和仿真得到的埋地管道泄漏流场分布进行研究,得出管壁泄漏声信号的声源构成及其随土壤孔隙率的变化规律,并通过实验采集分析不同情况下的管壁泄漏声信号,验证理论分析与仿真的结果。结果表明:埋地聚乙烯燃气管道的管壁泄漏声信号主要由泄漏气体与土壤及管壁气固耦合所产生的偶极子声源主导;在土壤孔隙率较大时,管壁泄漏声信号要高于架空管道,但会随着土壤孔隙率的降低而降低,当孔隙率足够小时,会低于架空管道。In order to investigate the characteristics of wall leakage sound signal of buried polyethylene gas pipeline and the influence of soil on leakage sound signal,this paper investigates the mechanism of buried pipeline leakage sound generation,energy loss law of leaking gas and the distribution of leakage flow field of buried pipeline obtained by simulation,and derives the sound source composition of wall leakage sound signal and its change law with soil porosity,and analyzes the wall leakage sound signal under different conditions by experimental acquisition,and verifies the theoretical analysis and simulation results.The results of the theoretical analysis and simulation are verified by experimentally collecting and analyzing the sound signal of pipe wall leakage under different conditions.The results indicated that the acoustic signal of buried polyethylene gas pipeline wall leakage is dominated by the dipole sound source generated by the gas-solid coupling between the leakage gas and soil and the pipe wall.When the soil porosity is large,the acoustic signal of pipe wall leakage is higher than that of overhead pipe,but it will decrease with the decrease of soil porosity.When the porosity is small enough,it will be lower than that of overhead pipe.

关 键 词：埋地环境 气体管道 泄漏声 主导声源 

分 类 号：TB9[一般工业技术—计量学] TE832[机械工程—测试计量技术及仪器]