A theoretical study on the attenuation model of leakage acoustic waves for natural gas pipelines

被引：0
|
作者：
Liu C. [1 ]
Jing H. [1 ]
Fang L. [2 ]
Xu M. [1 ]
机构：
[1] College of Pipeline and Civil Engineering in China University of Petroleum (East China), Qingdao
[2] College of Chemistry and Chemical Engineering in Qinzhou University, Qinzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2018年 / 37卷 / 20期
关键词：
Acoustic method; Attenuation model; Gas pipelines; Propagation law; Theoretical derivation;
D O I：
10.13465/j.cnki.jvs.2018.20.017
中图分类号：
学科分类号：
摘要：
Studies on the propagation model for natural gas pipelines have not been considered thoroughly. When the propagation characteristics are studied, the influences of gas flow on the attenuation model were not consideration. Therefore, the propagation equation was deduced in the gas pipelines. The amplitude attenuation models were established in theory and in experiments. Firstly, the theoretical attenuation model was established in the viscous flow with uniform velocity considering gas flow, turbulent effect and viscothermal effect. Then the attenuation factors were calculated in experiments and in theory in 10 mm gas pipelines. When the original signals were processed, the upstream errors calculated in theory were less than 6.0%. When the wavelet transform (WT) signals were processed, the upstream errors calculated in theory were less than 7.0% while the downstream ones were less than 12.0%. And the reasons for the errors were analyzed. The results show that the established attenuation model can be verified by the experiments. © 2018, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：109 / 114
页数：5
相关论文
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