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Weld inspection by focused adjoint method
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DOI：10.1016/j.ultras.2017.08.009.png)
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摘要
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This paper reports a methodology for the non-destructive ultrasonic evaluation of welds, based on probing, residue back-focusing and topological energy calculation using an enhanced (focused) adjoint method. The proposed method combines the advantages of time reversal to compensate for the cumulative distorsions experienced by a wave propagating in a heterogeneous medium, and topological imaging to highlight the defect location. The synergistic effect of this combined approach makes it possible to detect anomalies in the most efficient way. The method paves the way towards a matchedinsonification imaging of anomalies in anisotropic media. (C) 2017 Elsevier B.V. All rights reserved.
Keyword:
Topological energy
Adjoint method
Wave focusing
Weld inspection
Finite element modeling
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分享收藏Coupling an ultrasonic propagation code with a model of the heterogeneity of multipass welds to simulate ultrasonic testing.png)
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