航空科学技术2024，Vol.35Issue(3)：11-19,9.DOI:10.19452/j.issn1007-5453.2024.03.002
飞行器舱室内壁蛛网仿生薄膜声学超材料设计
Design of Spider Web Bio-inspired Membrane Acoustic Metamaterials for Aircraft Cabin Walls
摘要
Abstract
The internal noise in an aircraft cabin poses a significant threat to passengers as well as flight control and communication.Membrane Acoustic Metamaterials(MAM)exhibit excellent noise reduction properties while fulfilling lightweight requirements,meeting the aviation industry's dual requirements of noise reduction and weight control.Inspired by the spider web,this paper proposed a bio-inspired MAM design,which integrates a membrane,frame,and set of resonators.Computational and experimental results show that the bio-inspired model reduces the resonator mass by 19%and expands the noise reduction bandwidth by 61%.Furthermore,this paper investigated the influence of three design parameters(membrane shape,resonator position,and model size)on the structure's noise reduction performance and analyze its multi-level anti-resonance modes.The results suggest that the round model outperforms the other two square models in noise reduction performance.When the resonator position has a radius ratio of 0.54,it yields the best noise reduction performance.While the model maintains a considerable noise reduction effect when reduced in size,it may fail when the size increases.The free frame contributes to the formation of anti-resonance modes in the 2×2 array model,but has an opposite effect in the 3×3 array model.By adjusting the design parameters according to different frequency requirements,our design can adapt to the complex and changeable noise environment inside the aircraft.关键词
薄膜声学超材料/仿生结构/飞行器降噪/宽频吸声/结构设计/舱内噪声Key words
membrane acoustic metamaterials/bio-inspired structures/aircraft noise reduction/broadband sound absorption/structural design/cabin noise分类
航空航天引用本文复制引用
曹尔泰,延浩,黄河源..飞行器舱室内壁蛛网仿生薄膜声学超材料设计[J].航空科学技术,2024,35(3):11-19,9.基金项目
航空科学基金(20200015053004) Aeronautical Science Foundation of China(20200015053004) （20200015053004）
