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作者:

Zhou, Jinjie (Zhou, Jinjie.) | He, Cunfu (He, Cunfu.) (学者:何存富) | Zheng, Yang (Zheng, Yang.) | Wu, Bin (Wu, Bin.)

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摘要:

When time reversal method is used for nondestructive testing of the pipeline with ultrasonic guided wave, the energy can be focused on the defect both in time and spatial domain. But the inspection of defects with different axial length and circumferential angle need to be further studied. Time reversal numerical simulation method was employed to visualize focusing process of guided waves in pipes. The varying of reflection coefficient of through-thickness crack before and after the time reversal method was studied. Results shown that reflection coefficient after time reversal method was much bigger than that before it when circumferential size was smaller, and it tended to be equal when circumferential size increased. When crack axial length increased from λ/100 toλ, reflection coefficient after the time reversal method was about 5-8 times of that before it, and both smallest and biggest value was consistent.

关键词:

Cracks Guided electromagnetic wave propagation Nondestructive examination Numerical methods Pipe Pipelines Reflection Ultrasonic testing

作者机构:

  • [ 1 ] [Zhou, Jinjie]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • [ 2 ] [He, Cunfu]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • [ 3 ] [Zheng, Yang]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • [ 4 ] [Wu, Bin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

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来源 :

Journal of Basic Science and Engineering

ISSN: 1005-0930

年份: 2012

期: 6

卷: 20

页码: 1128-1136

被引次数:

WoS核心集被引频次: 0

SCOPUS被引频次: 1

ESI高被引论文在榜: 0 展开所有

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