Low-frequency broadband metamaterials for ventilated acoustic insulation

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-02-05 DOI:10.1016/j.ijmecsci.2025.110044

Hao-Bo Qi , Shi-Wang Fan , Mu Jiang , Zhu Tong , Badreddine Assouar , Yue-Sheng Wang

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Abstract

Achieving effective sound insulation across a broadband range at low frequency while ensuring sufficient ventilation remains a significant challenge in the field of acoustic engineering, as there exist complex trade-offs in attenuation capacity, operating frequency, and opening size. Here, a double Archimedean spiral structure is proposed and then optimized using genetic algorithms. The sparse design, featuring ventilated channels on both sides of the unit, significantly expands the operational frequency range, effectively blocking over 80 % of incident energy within the 546–1575 Hz range. Its working mechanism can be attributed to the Fano-like resonance effect, which is further revealed by employing a mechanical analogy based on the spring-mass model. Moreover, the addition of foams and a reconfigurable modular assembly enhances both broadband sound reduction and flexibility. Consistency between numerical simulations and experimental results validate the potential for this approach in applications of ventilated acoustic insulation, offering advantageous theoretical and practical perspectives.

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.