A method for improving wave suppression ability of acoustic black hole plate in low-frequency range

Wan, Zhiwei; Zhu, Xiang; Li, Tianyun; Fu, Junyong

doi:10.1016/j.tws.2022.110327

Cited by 30 publications

(4 citation statements)

References 34 publications

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“…Moreover, Ilanko also used inertial penalty to speed up the convergence of the method [51]. The advantage of using artificial springs is that of allowing the simulation of arbitrary constraints, exemplified by plate [52] and cylindrical shell [53,54] boundary conditions, connections between plates and resonators [55,56], and beam [57] and plate-shell coupling systems [58,59]. Another useful approach in the RRM is the Lagrangian multiplier method (LMM) [60,61].…”

Section: Introductionmentioning

confidence: 99%

An artificial spring component mode synthesis method for built-up structures

Deng

Guasch

Maxit

et al. 2023

International Journal of Mechanical Sciences

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Section: Introductionmentioning

confidence: 99%

An artificial spring component mode synthesis method for built-up structures

Deng

Guasch

Maxit

et al. 2023

International Journal of Mechanical Sciences

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“…In past decades, there has been a growing interest in developing effective models for the design and prediction of lightweight and compact structures that exhibit superior performance 4 – 6 . Constrained layer damping (CLD), which involves stiffer metal surface layers enveloping a viscoelastic material (VEM) core, is a widely adopted and straightforward treatment for achieving lightweight and high damping compared to acoustic metamaterials 7 – 10 . Initially proposed by Kerwin et al 11 , 12 , it has been the primary method for vibration attenuation in various industries, including aerospace engineering, ocean, and automotive 13 – 15 .…”

Section: Introductionmentioning

confidence: 99%

Damping contribution of viscoelastic core on airborne sound insulation performance of finite constrained layer damping panels at low and middle frequencies

Wang,

Min

2023

Sci Rep

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The airborne sound insulation performance of finite sandwich panels is often significantly worsened by resonant transmission components in low and middle frequencies. In this paper, damping contribution of viscoelastic core on sound transmission loss (STL) of finite constrained layer damping (CLD) panels is studied in narrow frequency bands. A fully coupled layer-wise approach is used with a generalized high-order shear deformation hypothesis that accounts for all types of deformations in the core. The influence of several parameters is investigated extensively. Results show that the adverse impact of the first-three odd-odd order modes, namely (1,1), (3,1), and (1,3) modes, as well as some higher-order modes on STL cannot be disregarded. The constrained viscoelastic core plays a crucial role in enhancing, or even eliminating, dips of STL spectrum at resonant frequencies. Additionally, it can considerably counterbalance a relatively broadband reduction of STL caused by the inter-modal coupling in middle frequencies. The damping mechanism can be divided into two aspects: (i) the reduction of modal amplitude by vibration energy dissipation, and (ii) the change of bending modal shapes. CLD treatment is a concise and effective way to achieve stable sound insulation performance.

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“…Moreover, many studies have aimed to obtain a better damping effect by adjusting the ABH structure and the configuration of damping layers. For example, a PZT patch was pasted on the cantilever beam to improve its dynamic effect [ 32 ], and a shunt damper with a blocking circuit was pasted on one side of the central area of the ABH [ 33 ]. Additionally, a combination of ABH and techniques with different physical application backgrounds may be effective at low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes

Zhao

et al. 2023

Materials

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Acoustic black holes (ABHs) are effective at suppressing vibrations at high frequencies, but their performance at low frequencies is limited. This paper aims to improve the low-frequency performance of ABH plates through the design of a metamaterial acoustic black hole (MMABH) plate. The MMABH plate consists of a double-layer ABH plate with a set of periodic local resonators installed between the layers. The resonators are tuned to the low-frequency peak points of the ABH plate, which are identified using finite element analysis. To dissipate vibration energy, the beams of the resonators are covered with damping layers. A modal analysis of the MMABH plate is performed, confirming its damping effect over a wide frequency band, especially at low frequencies.

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A method for improving wave suppression ability of acoustic black hole plate in low-frequency range

Cited by 30 publications

References 34 publications

An artificial spring component mode synthesis method for built-up structures

An artificial spring component mode synthesis method for built-up structures

Damping contribution of viscoelastic core on airborne sound insulation performance of finite constrained layer damping panels at low and middle frequencies

Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes

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