| 贾九红,刘天阳,刘学成,廖作雨,张显程.基于周向SH0导波的管道轴向缺陷定量表征*[J].,2020,39(4):581-588 |
| 基于周向SH0导波的管道轴向缺陷定量表征* |
| Quantitative characterization of axial defects in pipes based on circumferential SH0 waves |
| 投稿时间：2019-09-05 修订日期：2020-07-01 |
| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 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. |
| DOI：10.11684/j.issn.1000-310X.2020.04.012 |
| 中文关键词: 周向SH0导波 监测 定量表征 轴向缺陷 管道 |
| 英文关键词: circumferential shear horizontal wave monitor quantitative characterization axial defects pipeline |
| 基金项目:国家重点研发计划 |
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