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AN EFFICIENT ALGORITHM FOR THE ACOUSTIC WAVE SCATTERING BY A LOCAL ROUGH INTERFACE
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DOI：10.1137/25M177864X.png)
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Abstract
En 中文
In this paper, we consider the time-harmonic acoustic scattering by a locally perturbed interface. The above problem is reduced to an equivalent Lippmann--Schwinger-type integral equation defined in a bounded domain, which preserves all the information of the unbounded interface. A direct discrete high-precision algorithm is developed to solve the above Lippmann--Schwinger equations by introducing a variable discretization step property and a smoothed integration kernel technique, which is not only computationally inexpensive but also fast converging. Moreover, the algorithm can be readily extended to the case of interfaces with multiple corners. Finally, numerical results are presented to illustrate the effectiveness of the algorithm even in the presence of corners.
Keywords:
cubature method
Lippmann--Swinger operator equation
acoustic scattering
locally rough interface
Journal
M
IF:
1.6
Papers:
26
Citations:
0