Huang, S., Zhang, L., Wen, G., Tham, Z. W., Yin, S., & Liu, J. (2025). Broadband acoustic wave suppression via total internal reflection in phase gradient curved metasurfaces. Smart Materials and Structures, 34(5), 055021. https://doi.org/10.1088/1361-665x/add637
Abstract:
Abstract
Vibration suppression remains a persistent challenge in engineering applications. Elastic metasurfaces have emerged as a promising solution, yet many existing designs rely on slotting and narrow-band structures, which compromise structural integrity and limit practical uses. In this work, a surface mounted phased gradient curved metasurface (PGCM) is designed based on the generalized Snell’s law and the theory of total internal reflection for broadband Lamb waves suppression. By adjusting the height of the curved beam, the phase of transmitted Lamb waves can be modulated over a 2π range. The dimensions of the cell structure are optimized through theoretical analysis and numerical simulation. The broadband wave suppression capabilities of the PGCM are thoroughly investigated and experimentally validated. Compared to existing metasurface designs, the PGCM effectively suppresses both normal incident Lamb waves and omnidirectional incident waves. Simulations show a maximum wave suppression of 39.72 dB for normal incidence and 21.34 dB for omnidirectional incidence, with a robust bandwidth effect under both conditions. Experimental results verify the wave suppression performance and bandwidth effect. The structure is simple, cost-effective, and suitable for surface mounting. This work provides an innovative solution for acoustic wave suppression.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the Agency for Science, Technology and Research - Manufacturing, Trade, and Connectivity Individual Research Grants
Grant Reference no. : M22K2c0090
Description:
This is the Accepted Manuscript version of an article accepted for publication in Smart Materials and Structures. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1361-665x/add637