Experimental study on influence of wall acoustic materials of 3D cavity for targeted energy transfer of a nonlinear membrane absorber

Shao, Jianwang; Luo, Qimeng; Deng, Guoming; Zeng, Tao; Yang, Jinmeng; Wang, Xian; Jin, Can

doi:10.1016/j.apacoust.2021.108342

Cited by 9 publications

(9 citation statements)

References 19 publications

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Section: Nonlinear Normal Modesmentioning

confidence: 99%

“…The mechanism of targeted energy transfer between the linear oscillator and the nonlinear membrane can be explained by 1:1 resonance capture, 35 and the lumped model is shown in Figure 10A. If the damping and excitation in Equations () and () are ignored and the equation is solved using the harmonic balance method, the relationship between system energy and frequency can be obtained.…”

Section: Theoretical Modeling Of the Experimental Systemmentioning

confidence: 99%

“…A tunable NES 31 was constructed by coupling a speaker with a linear acoustic system, and a system with multiple nonlinear membranes 32 arranged in parallel improved the efficiency and robustness of the targeted energy transfer. At the same time, the broadband sound absorption performance of the large-amplitude nonlinear vibrating membrane [33][34][35][36] was studied. These studies show that directional transmission of acoustic waves can be realized by using an NES, which provides a new method for low-frequency noise control.…”

Section: Introductionmentioning

confidence: 99%

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Realization of nonreciprocal acoustic energy transfer using an asymmetric strong nonlinear vibroacoustic system

Jin,

Huang,

Xiao

2024

Int Journal of Mech Sys Dyn

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In this paper, an asymmetric vibroacoustic system that can passively realize nonreciprocal transmission of acoustic energy is reported. This experimental system consists of a waveguide, a strongly nonlinear membrane, and three acoustic cavities with different sizes. The theoretical modeling of the system is verified by experiments, and parametric analysis is also carried out. These intensive studies reveal the nonreciprocal transmission of acoustic energy in this prototype system. Under forward excitation, internal resonance between the two nonlinear normal modes of the vibroacoustic system occurs, and acoustic energy is irreversibly transferred from the waveguide to the nonlinear membrane. However, under backward excitation, there is no internal resonance in the system. Energy spectra and wavelet analysis are used to highlight the mechanism of nonreciprocal transfer of acoustic energy. Consequently, nearly unidirectional (preferential) transmission of acoustic energy transfer is shown by this system. The nonreciprocal acoustic energy transfer method illustrated in this paper provides a new way to design the odd acoustic element.

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Section: Nonlinear Normal Modesmentioning

confidence: 99%

Section: Theoretical Modeling Of the Experimental Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Realization of nonreciprocal acoustic energy transfer using an asymmetric strong nonlinear vibroacoustic system

Jin,

Huang,

Xiao

2024

Int Journal of Mech Sys Dyn

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“…In recent years, significant research on compact acoustic metamaterials have been reported and improvements have been made to structure by employing folding cavity that compress the originally long channels into a compact space and effectively transfer the thickness from the vertical direction to the lateral direction [16][17][18]. Resonant sound absorbers based on membrane structures have achieved strong sound absorption with low loss coefficients [19,20]. Second-order sound absorbing metasurfaces are characterized with labyrinthine structures [21].…”

Section: Introductionmentioning

confidence: 99%

A compact low-frequency sound absorption metastructure realized by resonators with wavy bending necks

Zhang,

Song,

Wang

et al. 2023

J. Phys. D: Appl. Phys.

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In this work, a compact low-frequency sound absorption metastructure composed of multiple resonators with embedded wavy bending necks is proposed. By arranging this metastructure in parallel and optimizing the parameters, it exhibits excellent broadband sound absorption capability in low-frequency range and has a much more compact volume. Compared with the traditional resonators, an individual resonator of this metastructure can move down the absorption frequency about 120 Hz while maintaining the same thickness. Furthermore, different resonator units are combined into a sound absorption array by employing appropriate design techniques. We first built a small metastructure composed of four units to demonstrate the correctness and accuracy of our design method. Both theoretical models and finite element simulation models are built and experimental results show good agreement between them. To achieve the same absorption value and frequency range, the thickest resonator in the traditional resonator array must be 30% thicker than the one in the wavy bending neck resonator array, which means the overall size of the structure is 30% larger. Following this design method, perfect sound absorption within the frequency range of 248 Hz–420 Hz is achieved with a compact volume of 53 mm in radius and 47 mm in height. The design strategy presents a new approach to achieve perfect broadband low-frequency sound absorption.

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“…To generalize the results found in [7], J. Shao studied this system where several acoustic modes of the parallelepipedic cavity are taken into account [8]. The experimental set-up described in [9] allowed to present the energy pumping between this cavity and the membrane.…”

Section: Introductionmentioning

confidence: 99%

Identification of the parameters of a simplified 2 degree of freedom model of a nonlinear vibroacoustic absorber coupled to an acoustic system in linear and nonlinear forced regimes

Bouzid

Côte

Fakhfakh³

et al. 2022

Acta Acust.

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This article presents a method for identifying the parameters of a simplified 2 degree of freedom model representative of a linear primary system coupled to a non-linear absorber in a forced harmonic regime over a wide range of amplitudes and forcing frequencies covering different dynamical regimes. This is a priori a difficult operation because it is necessary to combine two apparently contradictory steps. The first step consists in establishing models representing the physics of the system which are analytically soluble, which imposes severe approximations. The second step consists in adjusting the parameters of the models to experimental data, which reveal some phenomena ignored by the models. To do so, two approximate analytic methods, Harmonic Balance and Complexification Averaging under 1:1 resonance, are used to describe the dynamics of the nonlinear system for its different operating regimes: linear behavior, nonlinear behavior without energy pumping, energy pumping, and saturation regime. Then, using a non-linear regression, the parameters of the simplified model are identified from experiments. The values obtained correspond to the expected physical quantities.

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Experimental study on influence of wall acoustic materials of 3D cavity for targeted energy transfer of a nonlinear membrane absorber

Cited by 9 publications

References 19 publications

Realization of nonreciprocal acoustic energy transfer using an asymmetric strong nonlinear vibroacoustic system

Realization of nonreciprocal acoustic energy transfer using an asymmetric strong nonlinear vibroacoustic system

A compact low-frequency sound absorption metastructure realized by resonators with wavy bending necks

Identification of the parameters of a simplified 2 degree of freedom model of a nonlinear vibroacoustic absorber coupled to an acoustic system in linear and nonlinear forced regimes

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