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arXiv 2109.00787math.NAcs.NA
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单平面波逆时谐弹性散射的因子分解法

Factorization method for inverse time-harmonic elastic scattering with a single plane wave

Guanqiu Ma, Guanghui Hu

AI总结:

本文提出单波因子分解法,利用单个远场模式恢复线弹性中的凸多边形散射体或源,并通过刚性测试圆盘的谱分析证明其独立于经典因子分解法的有效性。

摘要:

本文研究利用单个远场模式的因子分解法,在线弹性中恢复任意凸多边形散射体/源。该方法也适用于由单个压缩(或剪切)平面波激发的远场模式的压缩(或剪切)部分。单波因子分解基于先验给定测试散射体的散射数据。它可以被视为一种域定义采样方法,不需要正向求解器。我们推导了刚性圆盘远场算子的谱系统,并证明利用测试圆盘,单波因子分解法可以独立于经典因子分解法得到论证。

英文摘要:

This paper is concerned with the factorization method with a single far-field pattern to recover an arbitrary convex polygonal scatterer/source in linear elasticity. The approach also applies to the compressional (resp. shear) part of the far-field pattern excited by a single compressional (resp. shear) plane wave. The one-wave factorization is based on the scattering data for a priori given testing scatterers. It can be regarded as a domain-defined sampling method and does not require forward solvers. We derive the spectral system of the far-field operator for rigid disks and show that, using testing disks, the one-wave factorization method can be justified independently of the classical factorization method.

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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