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清华大学学报(自然科学版)  2018, Vol. 58 Issue (8): 740-745    DOI: 10.16511/j.cnki.qhdxxb.2018.21.014
  机械工程 本期目录 | 过刊浏览 | 高级检索 |
基于缓冲波导的T(0,1)模态导波激励方法实验研究
孙斐然1, 丁雨林1, 孙振国1,2, 陈强1,2, MURAYAMA Riichi3
1. 清华大学 机械工程系, 北京 100084, 中国;
2. 浙江清华长三角研究院, 嘉兴 314006, 中国;
3. 福冈工业大学 智能机械工程系, 福冈 811-0295, 日本
Experimental study of the T(0,1)-wave excitation method based on a buffer waveguide
SUN Feiran1, DING Yulin1, SUN Zhenguo1,2, CHEN Qiang1,2, MURAYAMA Riichi3
1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China;
3. Department of Intelligent Mechanical Engineering, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan
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摘要 缓冲波导是解决超声传感器在高温管道在线检测中失效问题的重要途径。针对已提出的通过在缓冲波导内产生S0模态的Lamb波,并利用缓冲波导与管道的连接耦合,间接激励出T(0,1)模态导波的方法,本文进行了实验研究,设计并研制了用于激励S0模态Lamb波的曲折型线圈电磁超声换能器和用于接收T(0,1)模态导波的周期性永磁铁阵列式电磁超声换能器。结果表明:S0模态的Lamb波通过缓冲波导后能够激励出T(0,1)模态的导波对管道进行检测,从而验证了该方法的有效性,并为该方法的工程应用奠定了基础。
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孙斐然
丁雨林
孙振国
陈强
MURAYAMA Riichi
关键词 超声导波缓冲波导T (0,1)模态管道检测电磁超声换能器高温管道    
Abstract:This paper presents an experimental study of the T(0,1) mode guided wave excitation method for a buffer waveguide wrapped around a pipe which has been proposed to overcome the main challenge in online inspection of high-temperature pipelines. The dispersion curve was analyzed in tests to show that the T(0,1) mode guided wave can be excited in the pipe by exciting the S0 mode Lamb wave in the buffer waveguide with a meander-line coil EMAT to generate the S0-wave and a PPM EMAT to detect the T(0,1)-wave. Tests indicate that the T(0,1)-wave can be converted from the S0-wave by the buffer waveguide, which verifies the validity of this method as a foundation for engineering applications.
Key wordsguided wave    buffer waveguide    T (0,1) mode    pipe inspection    electromagnetic acoustic transducer (EMAT)    high-temperature pipe
收稿日期: 2018-02-07      出版日期: 2018-08-15
通讯作者: 孙振国,副教授,E-mail:sunzhg@tsinghua.edu.cn     E-mail: sunzhg@tsinghua.edu.cn
引用本文:   
孙斐然, 丁雨林, 孙振国, 陈强, MURAYAMA Riichi. 基于缓冲波导的T(0,1)模态导波激励方法实验研究[J]. 清华大学学报(自然科学版), 2018, 58(8): 740-745.
SUN Feiran, DING Yulin, SUN Zhenguo, CHEN Qiang, MURAYAMA Riichi. Experimental study of the T(0,1)-wave excitation method based on a buffer waveguide. Journal of Tsinghua University(Science and Technology), 2018, 58(8): 740-745.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2018.21.014  或          http://jst.tsinghuajournals.com/CN/Y2018/V58/I8/740
  图1 基于缓冲波导的高温管道 T(0,1) 模态导波激励方法
  图2 缓冲波导温度分布的计算模型
  图3 缓冲波导内的温度分布曲线
  表1 管道和缓冲波导的物理参数
  图4 超声导波的频散曲线
  图5 曲折型线圈 EMAT
  图6 圆周式 PPM EMAT
  图7 基于缓冲波导激励 T(0,1)模态导波的实验装置
  图8 S0模态导波通过缓冲波导后转换为 T(0,1)模态导波的波形图
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