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Calculating the Influence of Refractions and Reflections from Curvilinear Surfaces of Shells of Revolution on Acoustic Field

  • ACOUSTIC METHODS
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Abstract

In the ray optics approximation, we have calculated the effect that changes in the directivity (defocusing) of an acoustic field due to refraction on a curvilinear entry surface and/or single or multiple reflections from curved inner surfaces of the shells of revolution have on the echo signal amplitude. The coincidence of the calculation results with the results of available studies is shown for special cases. A formula for calculating changes in the amplitude makes it possible to determine a defocusing-related change in the size of the echo pulse beam at the entry surface. The correctness of the calculation is confirmed experimentally, using specimens of pipes with embedded artificial corner reflectors.

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Authors and Affiliations

  1. OOO Al’yans-Ekspert, 628684, Megion, Khanty-Mansi Autonomous Okrug—Ugra, Russia

    A. V. Michurov

  2. PAO Slavneft’-Megionneftegaz, 628680, Megion, Khanty-Mansi Autonomous Okrug—Ugra, Russia

    A. V. Sokolkin

Authors
  1. A. V. Michurov
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  2. A. V. Sokolkin
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Correspondence to A. V. Michurov or A. V. Sokolkin.

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Translated by V. Potapchouck

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Michurov, A.V., Sokolkin, A.V. Calculating the Influence of Refractions and Reflections from Curvilinear Surfaces of Shells of Revolution on Acoustic Field. Russ J Nondestruct Test 56, 28–40 (2020). https://doi.org/10.1134/S1061830920010076

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  • DOI: https://doi.org/10.1134/S1061830920010076

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