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arXiv 2210.16617math.AP
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声-弹性透射特征值问题的谱性质及其应用

Spectral properties of an acoustic-elastic transmission eigenvalue problem with applications

Huaian Diao, Hongjie Li, Hongyu Liu, Jiexin Tang

AI总结:

本文研究声-弹性透射特征值问题,证明了温和条件下该特征值的存在性,建立了透射特征函数的边界局域化几何刚性结果,并探讨了其在超材料构建和流固耦合反问题中的应用。

摘要:

本文研究声波与弹性波耦合传播中产生的一种多物理耦合谱问题,即声-弹性透射特征值问题。该工作有两项文献中未见报道的主要贡献:第一,在介质参数的温和条件下,证明了声-弹性透射特征值的存在性;第二,通过证明透射特征函数倾向于局域化在相关区域的边界上,建立了透射特征函数的几何刚性结果。此外,本文还探讨了所得结果在利用含气泡弹性结构有效构建超材料,以及在与流固耦合相关的反问题中的有趣应用意义。

英文摘要:

We are concerned with a coupled-physics spectral problem arising in the coupled propagation of acoustic and elastic waves, which is referred to as the acoustic-elastic transmission eigenvalue problem. There are two major contributions in this work which are new to the literature. First, under a mild condition on the medium parameters, we prove the existence of an acoustic-elastic transmission eigenvalue. Second, we establish a geometric rigidity result of the transmission eigenfunctions by showing that they tend to localize on the boundary of the underlying domain. Moreover, we also consider interesting implications of the obtained results to the effective construction of metamaterials by using bubbly elastic structures and to the inverse problem associated with the fluid-structure interaction.

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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