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[1]胡雄伟　冯新　周晶.双缺陷相互作用对纵向导波影响的数值模拟[J].油气储运,2021,40(03):1-7.
　HU Xiongwei,FENG Xin,ZHOU Jing.Numerical simulation on influence of interaction of double defects onlongitudinal guided waves[J].Oil & Gas Storage and Transportation,2021,40(03):1-7.
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双缺陷相互作用对纵向导波影响的数值模拟

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 40 期数: 2021年03 页码: 1-7 栏目: 出版日期: 2021-03-25
Title:

Numerical simulation on influence of interaction of double defects on
longitudinal guided waves

作者:

胡雄伟　冯新　周晶  

Author(s):

HU Xiongwei;  FENG Xin;  ZHOU Jing

关键词:

超声导波; 管道; 反射系数; 数值模拟; 双缺陷; 叠加原理

Keywords:

ultrasonic guided wave;  pipeline;  reflection coefficient;  numerical simulation;  double defects;  superposition principle

分类号:
TE88
文献标志码:
A
摘要:

利用导波技术检测管道缺陷，将不可避免地遇到多缺陷相互作用问题。针对此类问题，利用
数值模拟方法研究管道中双缺陷相互作用规律，建立了双缺陷管道的三维有限元波动数值模型，并
通过与已有实验结果的对比验证了所建立模型的正确性，在此基础上系统研究了相同大小双缺陷相
对位置对导波反射特性的响应机理。研究表明，对双缺陷管道而言，两缺陷的相对周向位置对缺陷
总体反射的影响很小，反射系数几乎不随缺陷的周向间距变化而变化；两缺陷的相对轴向位置对总
体反射有较大影响，反射系数随轴向间距呈周期性变化。此外，在一定轴向长度范围内的多个缺陷，
其反射系数近似符合叠加原理, 这对局部缺陷群的检测有重要意义。

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更新日期/Last Update: 2021-02-01