Construction of Numerical Model using Wavefield Data and Its Application of Flaw Imaging by Time Reversal Method

DOI

Bibliographic Information

Other Title
  • Wavefieldデータを利用した数値モデルの構築と時間反転イメージングへの応用

Abstract

<p>Time reversal techniques using an ultrasonic array transducer have been proposed in nondestructive testing for complicated wave field. In this study, we propose a simulation–aided flaw imaging method based on the time reversal approach. Scattered waves from flaws are recorded with array receiving elements, and the time-reversed signals are emitted into a finite element (FE) model. The time reversal waves propagate in the model and focus on the flaw location. By calculating a cross-correlation of the incident and the reverse propagated waves, the flaw shape can be reconstructed. For the FE simulation, the elastic stiffness constants are fundamental input parameters. Here, the elastic constants of the anisotropic material are determined using wavefield data measured by a laser ultrasonic method.</p>

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Details 詳細情報について

  • CRID
    1390852581595439616
  • NII Article ID
    130008101058
  • DOI
    10.11345/japannctam.65.0_69
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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