Topology-Optimized Omnidirectional Broadband Acoustic Ventilation Barrier

Xu, Zi-Xiang; Gao, Hao; Ding, Yujiang; Yang, Jing; Liang, Bin; Cheng, Jianchun

doi:10.1103/physrevapplied.14.054016

Cited by 35 publications

(7 citation statements)

References 37 publications

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“…Broadband ventilation barriers can also be realized by leveraging Bragg reflection stem from a sonic crystal. Xu et al [86] proposed a crystal design made of sparse interlaced contraction structures (figures 9(c) and (d)). Although the mechanism of Bragg reflection suggests a large thickness, in this work, the density-based topological optimization was demonstrated as a great power to boost the performances in both ventilation and sound-proofing capacities, while keeps the number of layers minimum (i.e.…”

Section: Broadband Designs Based On Bragg Reflectionmentioning

confidence: 99%

Recent advances in acoustic ventilation barriers

Dong¹,

Sun²,

Mo³

et al. 2021

J. Phys. D: Appl. Phys.

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Acoustic barriers designed for sound insulation block airflow transport at the same time. However, in acoustic engineering, particular scenarios are calling for noise control in a flowing-fluid-filled circumstance. Acoustic metasurfaces, owing to their unique functional characteristics and vanishing size, hold out new solutions for acoustic ventilation barriers. In this review, we trace the development of acoustic ventilation barriers and categorize them into several variants. We focus on the core underpinned physics, such as local resonance and Fano-like interference, that can fulfill the task of simultaneous ventilation and sound-proofing. Since these mechanisms naturally support a very narrow working range, we further underline those efforts taken on expanding the sound-proofing range. Finally, current challenges as well as the outlook of future directions in this emerging field are discussed.

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Section: Broadband Designs Based On Bragg Reflectionmentioning

confidence: 99%

Recent advances in acoustic ventilation barriers

Dong¹,

Sun²,

Mo³

et al. 2021

J. Phys. D: Appl. Phys.

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“…At the time of writing this article, topology optimisation has been performed on a variety of acoustic applications, including horns, mu✏ers, rooms and sound barriers [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] . A majority of these applications use the gradient-based SIMP method or its variants, while a small fraction of them use BESO or level-set methods.…”

Section: Acoustic Topology Optimisationmentioning

confidence: 99%

Comparison of heuristics and metaheuristics for topology optimisation in acoustic porous materials

Ramamoorthy

Özcan

Parkes

et al. 2021

The Journal of the Acoustical Society of America

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When designing sound packages, often fully filling the available space with acoustic materials is not the most absorbing solution. Better solutions can be obtained by creating cavities of air pockets, but determining the most optimal shape and topology that maximises sound absorption is a computationally challenging task. Many recent topology optimisation applications in acoustics use heuristic methods such as solid-isotropic-material-with-penalisation (SIMP) to quickly find near-optimal solutions. This study investigates seven heuristic and metaheuristic optimisation approaches including SIMP applied to topology optimisation of acoustic porous materials for absorption maximisation. The approaches tested are hill climbing, constructive heuristics, SIMP, genetic algorithm, tabu search, covariance-matrix-adaptation evolution strategy (CMA-ES), and di↵erential evolution. All the algorithms are tested on seven benchmark problems varying in material properties, target frequencies, and dimensions. The empirical results show that hill climbing, constructive heuristics, and a discrete variant of CMA-ES outperform the other algorithms in terms of the average quality of solutions over the di↵erent problem instances. Though gradient-based SIMP algorithms converge to local optima in some problem instances, they are computationally more e cient. One of the general lessons is that di↵erent strategies explore di↵erent regions of the search space producing unique sets of solutions.

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“…[52] These types of structures can realize sound insulation/absorption and ventilation simultaneously, however, the working bandwidths are narrow owing to resonance nature. In order to solve this problem, several researches [53][54][55][56][57][58][59] have been devoted to optimizing working bandwidths of sound insulation/sound absorption, such as ultra-wideband ventilation barrier [53] based on sound dissipation mechanism and interference mechanism, and ventilated sound metamaterial and sound absorption metamaterial based on the coupling modulation of resonance energy leakage and loss. [59] However, it still poses a great challenge to further increasing the bandwidth of ventilated sound-reduction structures.…”

Section: Introductionmentioning

confidence: 99%

Ultra-broadband acoustic ventilation barrier based on multi-cavity resonators

Xu 许,

Guan 管,

Wu 吴

et al. 2023

Chinese Phys. B

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We report the numerical and experimental realization of an ultra-broadband acoustic ventilation barrier composed of periodic unit cells. Based on multiple mechanisms, including sound absorption by eigenmodes of the unit cell and sound reflection by a plate structure on upper surface of the unit cell, we design a single-layer ventilation barrier with broadband sound reduction, and the working bandwidth can reach about 1560 Hz. The experimental results agree well with the simulation ones. Furthermore, we design and demonstrate two types of three-layer ventilation barriers by using the unit cells with different values of a (the length of the hollow square region) and w (the width of the channel between the adjacent cavities), and the bandwidths of both ventilation barriers can be increased to 3160 and 3230 Hz, respectively. The designed barrier structures have the advantages of ultra-broadband sound reduction and ventilation, which paves a way to design high-performance ventilation barriers for the application in environmental protection and architectural acoustics.

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Topology-Optimized Omnidirectional Broadband Acoustic Ventilation Barrier

Cited by 35 publications

References 37 publications

Recent advances in acoustic ventilation barriers

Recent advances in acoustic ventilation barriers

Comparison of heuristics and metaheuristics for topology optimisation in acoustic porous materials

Ultra-broadband acoustic ventilation barrier based on multi-cavity resonators

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