Vibration mitigation via integrated acoustic black holes

Li, Meiyu; Deng, Jie; Zheng, Ling; Xiang, Shuguang

doi:10.1016/j.apacoust.2022.109001

Cited by 18 publications

(4 citation statements)

References 49 publications

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“…In terms of applications of engineering, ABH structures are commonly used for vibration suppression [13][14][15][16], noise control [17,18], and energy harvesting [19][20][21]. From the perspective of application design, ABHs are usually embedded within structures.…”

Section: Introductionmentioning

confidence: 99%

Vibration control mechanisms of plate structures by 1D acoustic black hole dynamic vibration absorber

Wen,

Guo,

et al. 2024

Phys. Scr.

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Due to the advantages of simple structure and effective vibration suppressions, acoustic black hole (ABH) structures attract many scholars’s attention. In this paper, by capitalizing phenomenon of acoustic black hole (ABH), an ABH-featured dynamic vibration absorber (1D-ABH-DVA) is proposed for vibration suppressions, and three improved cases are proposed based on the 1D-ABH-DVA. To achieve broadband vibration suppression, three optimization cases of distribution are designed. Using a plate as primary structure, both numerical simulations and experiments show that multiple resonances of the plate can be significantly reduced by 1D-ABH-DVA. Three types of vibration reduction mechanisms are revealed, manifesting and dominating by different physical process, i.e. peak splitting effect, damping enhancement effect and their combination. The numerical simulations show that an evenly distribution pattern can get better vibration suppressions. This work provides ideas for further application of ABHs in vibration and noise reduction, and has significant engineering significance.

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Section: Introductionmentioning

confidence: 99%

Vibration control mechanisms of plate structures by 1D acoustic black hole dynamic vibration absorber

Wen,

Guo,

et al. 2024

Phys. Scr.

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“…More recently in the ABH litterature, it has been proposed to use the ABH effect in an external device that can be appended to the primary structure as a vibration absorber. For example, an ABH beam is installed on a primary structure in [58,59], a circular plate with varying thickness is considered in [60,61], while ABH pillars are added to a beam in [62]. Leveraging on this idea, we propose here a vibration absorber based on the VI-ABH concept, which combines ABH effect with impact nonlinearity in order to enhance its low-frequency behaviour, that can be attached to a primary structure for vibration mitigation.…”

Section: Introductionmentioning

confidence: 99%

Broadband shock vibration absorber based on vibro-impacts and acoustic black hole effect

Li,

O’Donoughue,

Masson

et al. 2024

International Journal of Non-Linear Mechanics

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“…Overall, extensive research has been conducted on the wave control characteristics of ABH, and their application value in engineering has been demonstrated. [42][43][44][45] In this paper, an active control elastic metasurface based on independent frequency conversion is proposed. The metasurface consists of a linear active piezoelectric sensor and a piezoelectric element combined with an actuator on the beam, and an ABH that can absorb flexural waves of any frequency.…”

Section: Introductionmentioning

confidence: 99%

A programmable metasurface based on acoustic black hole for real-time control of flexural waves

Su,

2024

Journal of Applied Physics

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The time-modulated active medium with linear independent frequency conversion method has been demonstrated to enable wave orientation and reconstruction. However, due to the symmetric scattering field, this technique requires intricate microcircuit designs. To overcome this limitation, this paper proposes a tunable piezoelectric metasurface based on acoustic black holes (ABHs) to redirect flexural wave reflections. The system can convert an incident flexural wave into a reflected wave of any direction and frequency. This is accomplished through the linear time modulation of the sensing signal, which breaks the constraints of Snell’s law inherent in traditional designs and is insensitive to the incident amplitude. The coupling of the ABH damping system with a linear independent frequency conversion mechanism allows for the conversion of an incident flexural wave into a reflected wave in any direction and frequency while also eliminating the influence of second harmonic reflection on the wave field and simplifying the time modulation circuit. In addition, this paper demonstrates arbitrary angle reflection, focusing, beam splitting, and frequency conversion of the incident wave. By improving the flexibility of elastic wave manipulation, this paper introduces a new approach for active control of elastic waves and provides a design method that can be employed in a variety of applications ranging from vibration protection of engineering structures to vibration sensing and evaluation.

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Vibration mitigation via integrated acoustic black holes

Cited by 18 publications

References 49 publications

Vibration control mechanisms of plate structures by 1D acoustic black hole dynamic vibration absorber

Vibration control mechanisms of plate structures by 1D acoustic black hole dynamic vibration absorber

Broadband shock vibration absorber based on vibro-impacts and acoustic black hole effect

A programmable metasurface based on acoustic black hole for real-time control of flexural waves

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