摘要
传统的隔声结构往往无法同时满足中低频宽带隔声和自由通风的要求,因此,提出一种基于Fano共振干涉的通风声学超材料。该声学超材料在508~674 Hz频率范围内可实现超过90%的声波衰减,同时保持开口面积占比达56%。超材料采用开放区域和不均匀横截面通道的折叠结构,通过引导声波穿过这两个区域,激发类Fano共振干涉的不对称传输,形成有效反射声波,进而起到显著的隔声效果。通过参数化分析,研究结构单元的可调声学性能,并通过遗传算法对这些参数进行优化,以实现500~1000 Hz更宽频段的声音衰减。研究为同时实现中低频宽带隔声和自由通风提供了一种高效的解决方案,通过模拟和实验证明了其结果的可靠性,可为相关领域的研究提供新的思路和方法。
Traditional sound insulation structures cannot meet the requirements of medium and low-frequency broadband sound insulation and free ventilation simultaneously.Therefore,a ventilation acoustic metamaterial based on Fano resonance interference was proposed.The acoustic metamaterial can achieve more than 90%sound wave attenuation in the frequency range of 508-674 Hz,while maintaining an opening area ratio of 56%.The metamaterial has a folded structure of open areas and uneven cross-section channels.By guiding sound waves through these two areas,the asymmetric transmission of Fano-like resonance interference was stimulated,and the effective reflection of sound waves was formed.Thereby,the efficient sound insulation was achieved.Through parametric analysis,the adjustable acoustic performance of the structural units was studied,and the parameters were optimized through genetic algorithms to achieve sound attenuation in a wider frequency band of 500-1000 Hz.The reliability of the results was proved through simulation and experiments.This study has provided an efficient solution for medium and low-frequency broadband sound insulation and free ventilation,and new ideas and methods for research in related fields.
作者
张崇卓
肖蓉蓉
叶少芃
陶猛
ZHANG Chongzhuo;XIAO Rongrong;YE Shaopeng;TAO Meng(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China)
出处
《噪声与振动控制》
北大核心
2025年第5期65-70,共6页
Noise and Vibration Control
基金
国家自然科学基金资助项目(52265010)
贵州省科学技术基金资助项目(黔科合基础[2020]1Z048)。
关键词
声学
声学超材料
Fano共振
通风降噪
宽带隔声
噪声控制
acoustics
acoustic metamaterials
Fano resonance
ventilation and noise reduction
broadband sound insulation
noise control
