Broadband vibration isolation in a finite elastic rod with tailored resonators

IF 2.1 3区 物理与天体物理 Q2 ACOUSTICS
Ali Ihsan Adham, Vladislav Sorokin, Brian Mace, Andrew Hall
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引用次数: 0

Abstract

Elastic and acoustic metamaterials and their ability to suppress noise and vibration have garnered broad interest. However, existing research has focused mainly on periodic metamaterial structures with identical vibration absorbers or resonators, while metamaterial structures with non-uniform and aperiodic resonators have received little attention. This paper presents a method for constructing broad frequency bands of low-vibration transmission using tailored resonators without enforcing restrictions on the resonators’ dynamic properties and positions. In contrast to conventional periodic metamaterials, the method we present connects individual localised resonance bands by strategically tuning and customising the resonators’ dynamic properties. We demonstrate through comparative case studies that tailored resonators can achieve broader attenuation bands with less total mass than periodic and identical resonators. Furthermore, we show that the number of resonators to achieve a preset vibration transmission level can be minimised using an iterative analysis process. Our approach provides enhanced design flexibility and efficiency in creating broad attenuation bands, offering new possibilities for practical vibration control applications where traditional periodic metamaterials face limitations.
具有定制谐振器的有限弹性杆的宽带隔振
弹性和声学超材料及其抑制噪声和振动的能力引起了广泛的兴趣。然而,现有的研究主要集中在具有相同吸振器或谐振腔的周期性超材料结构上,而具有非均匀和非周期谐振腔的超材料结构很少受到关注。本文提出了一种利用定制谐振器构建低振动传输宽频带的方法,而不限制谐振器的动态特性和位置。与传统的周期性超材料相比,我们提出的方法通过战略性地调整和定制谐振器的动态特性来连接单个局部共振带。我们通过比较案例研究证明,定制谐振器比周期谐振器和相同谐振器具有更宽的衰减带和更少的总质量。此外,我们表明,可以使用迭代分析过程将达到预设振动传输水平的谐振器数量最小化。我们的方法在创建宽衰减带方面提供了增强的设计灵活性和效率,为传统周期性超材料面临限制的实际振动控制应用提供了新的可能性。
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
Wave Motion
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.
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