Reconstructing waves traveling in a discrete granular chain from experimental acoustic measurement

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-10-03 DOI:10.1016/j.apacoust.2025.111090

Zhansheng Ye

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Abstract

This paper presents a method for reconstructing elastic waves in a granular chain using a double-bead impulse response (IR) that bridges the contact force of two colliding beads and their radiated acoustic pressure, considering the experimental infeasibility of a single bead. An impulse response variation (IRV) is proposed to compensate for the variation in acoustic pressure caused by adjacent beads in the granular chain. The calculation processes for IR and IRV are detailed, and two-bead and three-bead experiments are designed to calculate them. Finally, the acceleration of a seven-bead chain is reconstructed using the proposed method and compared with analytical solution and laser measurements. The reconstruction using only IR exhibits poor agreement with laser measurements, but incorporating IRV significantly improves the accuracy. The results show that the reconstruction involving IRV fits better with laser measurements, proving the necessity of IRV for the dynamic reconstruction of granular chains. This study is the first to experimentally reconstruct the motion of a granular chain via acoustic signals, offering a novel approach for non-destructive measurement in granular media.

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从实验声学测量中重建以离散颗粒链传播的波

考虑到单粒实验的不可行性，本文提出了一种利用双粒冲击响应（IR）重建颗粒链中弹性波的方法，该方法将两个碰撞珠的接触力和它们的辐射声压桥接起来。提出了一种脉冲响应变化（IRV）来补偿颗粒链中相邻珠粒引起的声压变化。详细介绍了红外辐射和红外辐射的计算过程，并设计了两头和三头实验进行计算。最后，用该方法重建了七头链的加速度，并与解析解和激光测量结果进行了比较。仅使用红外的重建显示与激光测量的一致性较差，但结合IRV显着提高了精度。结果表明，IRV的重建与激光测量结果吻合较好，证明了IRV对颗粒链动态重建的必要性。这项研究首次通过声学信号实验重建颗粒链的运动，为颗粒介质的无损测量提供了一种新的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.