arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.04133math.NAcs.NA
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高频声硬散射问题的谱Galerkin边界元方法

Spectral Galerkin boundary element methods for high-frequency sound-hard scattering problems

Akash Anand, Yassine Boubendir, Fatih Ecevit, Souaad Lazergui

摘要:

本文设计了两种不同类型的Galerkin边界元方法,用于求解二维光滑凸散射体外部的高频声硬散射问题。这两种方法都需要在自由度的数量上以$k^ε$的数量级(对于任何$ε>0$)小的增加,以保证随着波数$k$的增加而与频率无关的精度。此外,数值解的精度是独立的频率提供足够多的条款,在渐近展开纳入积分方程制定。数值结果验证了我们的理论研究结果。

英文摘要:

This paper is concerned with the design of two different classes of Galerkin boundary element methods for the solution of high-frequency sound-hard scattering problems in the exterior of two-dimensional smooth convex scatterers. Both methods require a small increase in the order of $k^ε$ (for any $ε>0$) in the number of degrees of freedom to guarantee frequency independent precisions with increasing wavenumber $k$. In addition, the accuracy of the numerical solutions are independent of frequency provided sufficiently many terms in the asymptotic expansion are incorporated into the integral equation formulation. Numerical results validate our theoretical findings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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