Ultralow-frequency tunable acoustic metamaterials through tuning gauge pressure and gas temperature

doi:10.1016/j.eml.2021.101218

	Ultralow-frequency tunable acoustic metamaterials through tuning gauge pressure and gas temperature
	Ning, Shaowu 3; Yan, Ziming 3; Chu, Dongyang 3; Jiang H(姜恒)1,2; Liu, Zhanli 3; Zhuang, Zhuo 3
刊名	EXTREME MECHANICS LETTERS
	2021-04-01
卷号	44 页码:9
关键词	Tunable acoustic metamaterials Gauge pressure Gas temperature Anti-symmetric and symmetric Lamb mode
ISSN号	2352-4316
DOI	10.1016/j.eml.2021.101218
通讯作者	Jiang, Heng(hengjiang@imech.ac.cn) ; Liu, Zhanli(liuzhanli@tsinghua.edu.cn)
英文摘要	Acoustic metamaterials possessing subwavelength characteristics can be used for low-frequency noise and vibration control. Acoustic metamaterials with adjustable dynamic properties can further enhance their possible applications. This paper designs a kind of tunable acoustic metamaterials consisting of the frame structure, airbag, and balancing weight. And their dynamic characteristics can be manipulated by tuning gauge pressure and gas temperature in the airbag. The calculation results indicate that the tunable acoustic metamaterials can effectively suppress the wave propagation and vibration in the ultralow-frequency band gap (about 13Hz similar to 90Hz) during manipulation. The complete band gap is the overlapping frequency range of an out-of- and in-plane band gaps. Numerical analyses indicate that the formation of out-of-plane band gap is due to the coupling between the out-of-plane resonant mode of balancing weight and the anti-symmetric Lamb mode of the frame structure. In contrast, the formation of an in-plane band gap is due to the coupling between the in-plane resonant mode of balancing weight and the symmetric Lamb mode of the frame structure. Meanwhile, the manipulation mechanism of these band gaps stems from the fact that through tuning gauge pressure or gas temperature, the structural stiffness of the airbag (torsional stiffness, in-plane, and out-of-plane stiffness) and frame structure (in-plane and bending stiffness) can be significantly tuned so that the modes related to them can be manipulated. The tunable acoustic metamaterials can be used for active control of low-frequency vibration and noise. It is possible to provide guidelines for designing other acoustic metamaterials to suppress low-frequency vibration and noise. (c) 2021 Published by Elsevier Ltd.
分类号	一类
WOS关键词	ELASTIC-WAVE PROPAGATION ; SOUND-TRANSMISSION LOSS ; SUBWAVELENGTH ARRAYS ; THIN PLATES ; BAND-GAPS ; TRANSFORMATION ; SCALE
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
WOS记录号	WOS:000643675200004
其他责任者	Jiang, Heng ; Liu, Zhanli
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/86509]
专题	力学研究所_国家微重力实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China; 3.Tsinghua Univ, Sch Aerosp Engn, Appl Mech Lab, Beijing 100084, Peoples R China;
推荐引用方式 GB/T 7714	Ning, Shaowu,Yan, Ziming,Chu, Dongyang,et al. Ultralow-frequency tunable acoustic metamaterials through tuning gauge pressure and gas temperature[J]. EXTREME MECHANICS LETTERS,2021,44:9.
APA	Ning, Shaowu,Yan, Ziming,Chu, Dongyang,姜恒,Liu, Zhanli,&Zhuang, Zhuo.(2021).Ultralow-frequency tunable acoustic metamaterials through tuning gauge pressure and gas temperature.EXTREME MECHANICS LETTERS,44,9.
MLA	Ning, Shaowu,et al."Ultralow-frequency tunable acoustic metamaterials through tuning gauge pressure and gas temperature".EXTREME MECHANICS LETTERS 44(2021):9.