A Fourier Integral-Boundary Element Method Applied to the Scattering of a Beam by Defect Under an Interface

作者:Bedrici Nacera*; Ben Tahar Mabrouk; Gatignol Philippe
来源:Acta Acustica United with Acustica, 2017, 103(2): 200-209.
DOI:10.3813/AAA.919048

摘要

The development of a hybrid iterative model Fourier integral-Boundary Element Method for the numerical modelization of the interaction of a bounded ultrasonic beam with a fluid/solid structure is described. The fluid and solid media are semi-infinite and separated by a plane interface. The beam is generated in the fluid by a plane transducer. The solid includes a finite defect. The bounded beam is modelized by the method of decomposition into plane waves by using a spatial Fourier transform. The scattering problem due to the defect is solved by a Boundary Element Method (BEM). In order to take the successive interactions with the interface and with the defect into account, an iterative method is implemented.

  • 出版日期2017-4

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