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Frontiers of Mechanical Engineering

ISSN 2095-0233

ISSN 2095-0241(Online)

CN 11-5984/TH

邮发代号 80-975

2019 Impact Factor: 2.448

Frontiers of Mechanical Engineering in China - Selected Publications from Chinese Universities  2008, Vol. 3 Issue (3): 251-260   https://doi.org/10.1007/s11465-008-0050-1
  本期目录
Time reversal method for guided wave inspection in pipes
Time reversal method for guided wave inspection in pipes
DENG Fei, WU Bin, HE Cunfu
College of Mechanical Engineering and Applied Electronic Technology, Beijing University of Technology
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Abstract:The application of the time reversal method in pipe-like structures based on finite element method (FEM) is investigated. A steel pipe model measuring 70 mm × 3.5 mm is used to analyze the reflection coefficient of the L(0,2) mode with the time reversal process. Simulation results show that the time reversal array method is beneficial to the improvement of the signal-to-noise ratio of a guided wave inspection system. As the intercepting window is widened, more energy is included in re-emitted signals, which leads to a large reflection coefficient of the L(0,2) mode. In parallel, a circumferential locating method based on the time reversal method is described. The time reversal process used for guided wave inspection leads to the temporal and spatial focusing. When the time reversal signals are re-emitted, the angular profile obtained at the axial location of the defect can be used to determine the circumferential location of the defect. Except for a pipe with one defect, the circumferential locating method has been verified on another pipe model with two defects. Meanwhile, the elements number of the time reversal array has been discussed for enhancing the discrimination of the defect circumferential location.
出版日期: 2008-09-05
 引用本文:   
. Time reversal method for guided wave inspection in pipes[J]. Frontiers of Mechanical Engineering in China - Selected Publications from Chinese Universities, 2008, 3(3): 251-260.
DENG Fei, WU Bin, HE Cunfu. Time reversal method for guided wave inspection in pipes. Front. Mech. Eng., 2008, 3(3): 251-260.
 链接本文:  
https://academic.hep.com.cn/fme/CN/10.1007/s11465-008-0050-1
https://academic.hep.com.cn/fme/CN/Y2008/V3/I3/251
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