Shear wave dispersion analysis of incompressible waveguides
Shear wave dispersion analysis of incompressible waveguides
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DOI：
10.1121/10.0003430
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发表时间：
2021-02-01
影响因子：
2.4
通讯作者：
Guddati, Murthy N.
中科院分区：
文献类型：
--
作者：
Roy, Tuhin;Guddati, Murthy N.
提出了一套方法来计算生物医学成像中遇到的不可压缩波导中的剪切波色散；这项工作考虑了所有浸没在不可压缩流体中的板、管和一般棱柱形波导。所开发的方法基于频域中的半解析有限元方法，特别关注与固体介质的不可压缩性相关的复杂性以及周围流体的不可压缩性所促进的简化。所提出的技术使用固体介质选择性减少积分的传统思想和周围流体完美匹配离散层的最新思想。此外，还使用了最近开发的用于板状结构的复长度有限元方法。给出了几个数值例子来说明所开发的技术在计算各种波导中的剪切波色散方面的实用性和有效性。 (C) 2021 年美国声学学会。
A suite of methodologies is presented to compute shear wave dispersion in incompressible waveguides encountered in biomedical imaging; plate, tube, and general prismatic waveguides, all immersed in an incompressible fluid, are considered in this effort. The developed approaches are based on semi-analytical finite element methods in the frequency domain with a specific focus on the complexities associated with the incompressibility of the solid media as well as the simplification facilitated by the incompressibility of the surrounding fluid. The proposed techniques use the traditional idea of selective reduced integration for the solid medium and the more recent idea of perfectly matched discrete layers for the surrounding fluid. Also, used is the recently developed complex-length finite element method for platelike structures. Several numerical examples are presented to illustrate the practicality and effectiveness of the developed techniques in computing shear wave dispersion in a variety of waveguides. (C) 2021 Acoustical Society of America.