Low frequency noise control in duct based on locally resonant membrane with attached resonators

Li, Jinze; Zuo, Hongwei; Shen, Cheng; Leung, R. C. K.

doi:10.1177/10775463221085860

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…These vibrations may affect working performance of precision equipment, lead to structural damage, and affect the comfort of users. Periodic structures with excellent wave attenuation characteristics within specific frequency ranges exhibit great potential for vibration control and noise reduction [1][2][3]. Metamaterials exhibiting local resonance band gaps have significantly expanded the application of small-scale periodic structures in the low-frequency domain [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

Li,

Wang,

Chai

et al. 2024

J. Phys. D: Appl. Phys.

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Structures with linkage mechanism, which could be widely seen in engineering, usually need to bear a certain load and exhibit ideal vibration isolation performance. One of the key factors affecting the mechanical and vibration properties is the connection behavior of the linkage mechanism. To clarify its influence on the vibration characteristics, a novel frog-like meta-structure by introducing a linkage mechanism into the conventional locally resonant metamaterial with a mass-spring resonator is proposed in the present paper, in which the linkage connection is considered as three types of hinged, fixed and elastic, respectively. The equivalent dynamic model of the meta-structure is established theoretically to calculate the effective material properties, which is then validated numerically through band gap and vibration analysis. The results show that the hinged linkage offers equivalent mass and free vertical displacement, while the fixed linkage provides supporting stiffness, shifting the band gap towards higher frequencies. An appropriate elastic connection can enhance the “spring-vibrator” effect, which in turn can significantly expand the low-frequency vibration suppression range of the structure. Experiments are also conducted corresponding to the different linkage mechanisms, and the dynamic model is verified. This study could provide a new idea for promoting the application of the locally resonant meta-structure with a linkage mechanism in the field of low-frequency vibration isolation.

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Section: Introductionmentioning

confidence: 99%

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

Li,

Wang,

Chai

et al. 2024

J. Phys. D: Appl. Phys.

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“…With the continuous advancement of acoustic metamaterial research towards engineering applications(Li et al, 2022), rapid progress has been made in physical mechanism and design theory (Burlon and Failla, 2022; Bae and Oh, 2022; El-Sabbagh et al, 2008; Li et al, 2020a; Song et al, 2015, 2019; Yi and Youn, 2016). The rapid implementation of the reverse design to meet the engineering structural requirements is an important direction to further enhance the application of acoustic metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Vibration transmission characteristic prediction and structure inverse design of acoustic metamaterial beams based on deep learning

Chen

et al. 2023

Journal of Vibration and Control

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In this paper, an intelligent prediction and design method of acoustic metamaterial beams based on deep learning is presented. A theoretical model of acoustic metamaterial beams is derived by using the spectral element method to calculate the band structure and transmission characteristic of beam-type acoustic metamaterial. A high-degree-of-freedom design space dataset of band structure and transmission characteristics is constructed. In addition, the vibration transmission characteristics of acoustic metamaterial beams are predicted and the on-demand inverse design of acoustic metamaterial beams is realized by constructing a fully connected deep learning neural network model. Furthermore, the forward prediction and reverse design network model is verified by using the autoencoder neural network model. Results show that the predicted value of the autoencoder neural network structure is in good agreement with the target value, which indicates the feasibility of the intelligent design method of acoustic metamaterials based on deep learning. The presented intelligent design method could be potentially utilized in the field of fast and efficient acoustic metamaterial design for low frequency vibration isolation in engineering structures.

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“…Phononic crystals (PCs) are artificial structures with exceptional material properties not observed in nature. The applications of PCs are diverse including noise reduction (Liu et al, 2020a; Cheng et al, 2022; Li et al, 2022), energy harvesting (Sugino et al, 2017; Sugino and Erturk, 2018; Lee et al, 2020), and wave guide (Shao et al, 2021; Liu et al, 2020c; Jensen, 2003). The most distinctive feature of PCs is frequency bands (band gaps) within which waves cannot propagate through the structure (Ji et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Analysis of flexural and torsional vibration band gaps in phononic crystal beam

Wang

Wan

Hong

et al. 2022

Journal of Vibration and Control

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Phononic crystals (PCs) play an important role in the reduction of vibration within a targeted frequency range. Most research of the one-dimensional PCs focuses on the properties or applications of the flexural band gaps; however, practically, the broadband environmental excitations also induce the torsional vibration. Hence, this paper studies a two-degrees-of-freedom local resonance (2DOF-LR) phononic crystal, which can both suppress the propagation of flexural and torsion waves in the same frequency range. To improve the computational efficiency, the Timoshenko theory with a modified transfer matrix (MTM) approach is used for flexural vibration band structure analysis. Through the finite element method (FEM), the vibration attenuation characteristics of the structure within the band gaps are verified. A comprehensive study is conducted to investigate the effects of geometric and material parameters on the attenuation characteristics of the phononic crystal. Finally, a prototype of the proposed phononic crystal is fabricated for the vibration experiment. It is worth noting that a novel experimental setup using the lever principle is designed in this paper to verify the torsional band gap. The frequency ranges of the experimental vibration attenuation match well with the numerical results.

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Low frequency noise control in duct based on locally resonant membrane with attached resonators

Cited by 5 publications

References 22 publications

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

A novel frog-like meta-structure with linkage mechanism for low-frequency vibration isolation

Vibration transmission characteristic prediction and structure inverse design of acoustic metamaterial beams based on deep learning

Analysis of flexural and torsional vibration band gaps in phononic crystal beam

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