Design and analysis of a microlattice structure for enhanced broadband sound absorption

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-03-19 DOI:10.1016/j.apacoust.2025.110681

Longhu Chen , Chaoyan Wang , Hongli Ji , Jinhao Qiu

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引用次数: 0

Abstract

This paper presents a novel microlattice structure designed for enhanced broadband sound absorption, leveraging the integration of a body-centered cubic (BCC) lattice with a triply periodic minimal surface (TPMS) I-Wrapped Package (IWP). The proposed microlattice sound absorber (MSA) features a hollow, two-stage parallel-coupled structure, which introduces multi-frequency dissipation components, achieving tunable and broadband sound absorption across a wide frequency range. The study employs both the LRF and JCA models to derive acoustic performance, and results are validated through numerical simulations and impedance tube experiments, demonstrating good agreement. Additionally, parametric analysis results demonstrate that increasing material thickness and reducing unit cell size can enhance overall sound absorption performance. Increasing the depth of the reserved back cavity can lower the peak frequency of the first-order sound absorption. The developed MSA structure is further applied in a muffler system, exhibiting broadband noise reduction and excellent ventilation performance. This research contributes a customizable and efficient approach to noise control, suitable for extreme environments, with broad applications in engineering fields such as aerospace and automotive industries.

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.