Fourier method for reconstructing elastic body force from the coupled-wave field

Fourier method for reconstructing elastic body force from the coupled-wave field
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DOI:
10.3934/ipi.2021052
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发表时间:
2021
影响因子:
1.3
通讯作者:
Wei Wu
Wei Wu
中科院分区:
数学4区
文献类型:
--
作者:
Xianchao Wang;Jiaqi Zhu;Minghui Song;Wei Wu

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本文研究弹性时谐波的震源反问题。提出了一种新的非迭代重建方案,利用多频傅里叶展开确定弹性体积力。该方法的关键是选择合适的容许频率,建立傅立叶系数与纵横波耦合波场之间的关系。理论分析和数值算例验证了该方法的有效性和鲁棒性。
This paper is concerned with the inverse source problem of the time-harmonic elastic waves. A novel non-iterative reconstruction scheme is proposed for determining the elastic body force by using the multi-frequency Fourier expansion. The key ingredient of the approach is to choose appropriate admissible frequencies and establish an relationship between the Fourier coefficients and the coupled-wave field of compressional wave and shear wave. Both theoretical justifications and numerical examples are presented to verify the validity and robustness of the proposed method.
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