Page 95 - 《应用声学》2020年第4期

第 39 卷 第 4 期 Vol. 39, No. 4
2020 年 7 月 Journal of Applied Acoustics July, 2020

⋄ 研究报告 ⋄

基于周向SH0导波的管道轴向缺陷定量表征 ∗

贾九红 † 刘天阳 刘学成 廖作雨 张显程

(华东理工大学 承压系统与安全教育部重点实验室 上海 200237)
摘要：随着管道服役时间的增加，其损伤逐渐累积，最终导致泄漏或爆炸事故。引入导波在线监测管道损伤是
确保其安全运行的重要保障。周向零阶水平剪切 (CSH0) 波具有不易频散、对管道轴向缺陷敏感等优秀特性，
非常适用于管道轴向缺陷的定量表征。该文基于周向 SH0 导波在管道的传播特性，通过有限元模拟和试验对
管道周向 SH0 模态导波与轴向缺陷的定量关系展开研究。结果表明：管道曲率半径越大，周向 SH0 模态的传
播特性越接近板中 SH0 模态的传播特性；导波信号的反射系数和透射系数对轴向缺陷的长度和深度均呈现单
调变化。依此建立了缺陷定量表征的关系云图，可用于评估缺陷尺寸。
关键词：周向 SH0 导波；监测；定量表征；轴向缺陷；管道
中图法分类号: TB553 文献标识码: A 文章编号: 1000-310X(2020)04-0581-08
DOI: 10.11684/j.issn.1000-310X.2020.04.012

Quantitative characterization of axial defects in pipes based on
circumferential SH0 waves

JIA Jiuhong LIU Tianyang LIU Xuecheng LIAO Zuoyu ZHANG Xiancheng

(Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology,
Shanghai 200237, China)

Abstract: As the service life of the pipeline increases, the damage accumulates, eventually leading to a leak
or explosion. The introduction of guided waves in monitor pipeline damage online is an important guarantee
to ensure its safe operation. The fundamental circumferential shear horizontal (CSH0) wave has excellent
characteristics, such as difficult to disperse and sensitive to axial defects of the pipeline. It is very suitable
for quantitative characterization of axial defects of pipelines. Based on the propagation characteristics of the
CSH0 guided wave in the pipeline, the quantitative relationship between the CSH0 guided wave and the axial
defect of the pipeline is studied by finite element simulation and experiment. The results show that the higher
the radius of curvature of the pipeline, the closer the propagation characteristics of the CSH0 mode are to the
propagation characteristics of the SH0 mode in the plate. The reflection coefficient and transmission coefficient
of the guided wave signal show a monotonous change to the length and depth of the axial defect. Based on
this, a corresponding nephogram for the quantitative characterization of defects is established, which can be
used to evaluate the defect size.
Keywords: Fundamental circumferential shear horizontal wave; Monitor; Quantitative characterization;
Axial defects; Pipeline

2019-09-05 收稿; 2019-11-28 定稿
国家重点研发计划项目 (2018YFC1902404)
∗
作者简介: 贾九红 (1979– ), 女, 河南鹤壁人, 博士, 副教授, 研究方向: 结构完整性监测。
† 通信作者 E-mail: jhjia@mail.ecust.edu.cn