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Determining Geometric-Acoustic Properties of a Weld as a Solution to the Inverse Coefficient Problem for a Scalar Wave Equation

  • ACOUSTIC METHODS
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Abstract

Ultrasonic tomographic methods of nondestructive testing of objects have been developed in order to determine the geometry of a weld and to estimate the velocity field in it. A solution to the inverse coefficient problem for the echo signal recording scheme in the shadow-mirror mode is proposed. Numerical simulations have been carried out for various tomographic schemes on samples with acoustic parameters and a geometry corresponding to a real experiment using an antenna array with an operating frequency of 2.25 MHz. Optimization of tomographic schemes for various applied problems is carried out by numerical methods. It is shown that with the help of the developed tomographic schemes it is possible not only to detect the boundaries of a welded joint, but also to determine the velocity field inside the test object.

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Funding

This work was financially supported by the Ministry of Education and Science of the Russian Federation within the framework of the program of the Moscow Center for Fundamental and Applied Mathematics under agreement no. 075–15–2019–1621. The work was performed using the equipment equipment of the shared research facilities of HPC computing resources Computing Resources at Lomonosov Moscow State University.

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Authors and Affiliations

  1. ECHO+ Scientific Production Association, 123458, Moscow, Russia

    E. G. Bazulin

  2. Moscow State University, 119992, Moscow, Russia

    A. V. Goncharskii, S. Yu. Romanov & S. Yu. Seryozhnikov

  3. Moscow Center for Fundamental and Applied Mathematics, 119992, Moscow, Russia

    A. V. Goncharskii, S. Yu. Romanov & S. Yu. Seryozhnikov

Authors
  1. E. G. Bazulin
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  2. A. V. Goncharskii
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  3. S. Yu. Romanov
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  4. S. Yu. Seryozhnikov
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Corresponding authors

Correspondence to E. G. Bazulin, A. V. Goncharskii, S. Yu. Romanov or S. Yu. Seryozhnikov.

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Bazulin, E.G., Goncharskii, A.V., Romanov, S.Y. et al. Determining Geometric-Acoustic Properties of a Weld as a Solution to the Inverse Coefficient Problem for a Scalar Wave Equation. Russ J Nondestruct Test 57, 933–944 (2021). https://doi.org/10.1134/S1061830921110036

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