Frequency-preserved non-reciprocal acoustic propagation in a granular chain

被引：36

作者：

Cui, Jian-Guo ^{[1
,2
]}

Yang, Tianzhi ^{[3
,4
]}

Chen, Li-Qun ^{[1
,2
]}

机构：

[1] Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai 200072, Peoples R China

[2] Shanghai Univ, Dept Mech, Shanghai 200444, Peoples R China

[3] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China

[4] Tianjin Key Lab Nonlinear Dynam & Chaos Control, Tianjin 300072, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2018年 / 112卷 / 18期

基金：

美国国家科学基金会;

关键词：

WAVES;

D O I：

10.1063/1.5009975

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Experimental evidence is presented for demonstrating frequency-preserved non-reciprocal acoustic propagation in a lower frequency range. A 23-bead granular chain and a conical rod are combined to realize this phenomenon. The conical rod is used to amplify the amplitude of the incident wave. Because of the inherent nonlinearity, this granular system offers an ideal testing platform that can provide an amplitude-dependent bandgap. By carefully tuning the taper ratio of the conical rod, a strong non-reciprocal acoustic propagation is observed. Moreover, such a phenomenon does not change the frequency of the incident wave due to the weak nonlinearity, which is different from previous studies. The result represents an advance in acoustic metamaterial systems using simple materials and paves the way for practical applications. Published by AIP Publishing.

引用

页数：4

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