基于 Cosserat 方程的弹性耦合相理论：相干波的传播

IF 2.1 3区物理与天体物理 Q2 ACOUSTICS

Wave Motion Pub Date : 2024-10-28 DOI:10.1016/j.wavemoti.2024.103430

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引用次数: 0

摘要

我们开发了一种新的耦合相理论（CPT），以模拟弹性相干波在含有随机分布球形弹性夹杂物的均质固体介质中的传播。为此，我们对之前针对流体介质开发的布耶维奇理论（布耶维奇和舍切尔奇科娃，1978 年）进行了调整，并将其应用于科斯拉特方程。其中的关键是引入独立散射近似法（ISA）。我们证明，相干波数明确取决于施加在球体上的外力、表征球体旋转的力矩以及颗粒对应变运动的阻力所产生的小应力。数值结果与实验数据非常吻合。

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Elastic coupled phase theory based on the Cosserat equations: Propagation of coherent waves

We develop a new coupled phase theory (CPT) in order to model the propagation of elastic coherent waves in homogeneous solid media containing randomly distributed spherical elastic inclusions. To this end, the Buyevich’s theory previously developed for fluid media (Buyevich and Shchelchkova, 1978) has been adapted and applied to the Cosserat equations. A key point is to introduce the Independent Scattering Approximation (ISA). We show that the coherent wavenumbers depend explicitly on the external force applied to spheres, the torque characterizing their rotation and the stresslet which is the result of the resistance of the particles to the straining motion. Numerical results are in good agreement with experimental data.

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来源期刊

Wave Motion 物理-力学

CiteScore

4.10

自引率

8.30%

发文量

118

审稿时长

3 months

期刊介绍： Wave Motion is devoted to the cross fertilization of ideas, and to stimulating interaction between workers in various research areas in which wave propagation phenomena play a dominant role. The description and analysis of wave propagation phenomena provides a unifying thread connecting diverse areas of engineering and the physical sciences such as acoustics, optics, geophysics, seismology, electromagnetic theory, solid and fluid mechanics. The journal publishes papers on analytical, numerical and experimental methods. Papers that address fundamentally new topics in wave phenomena or develop wave propagation methods for solving direct and inverse problems are of interest to the journal.