Bistable sound insulator with an abrupt stiffness shift using magnetic-coupled dielectric elastomer actuator

被引：7

作者：

Zhang, Yu ^{[1
,2
]}

Li, Bo ^{[1
,2
]}

Chang, Longfei ^{[3
]}

Ma, Fuyin ^{[1
,2
]}

Zhou, Xiaoling ^{[4
]}

Chen, Guimin ^{[1
,2
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mfg Engn Syst, Shaanxi Prov Key Lab Intelligent Robots, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China

[3] Hefei Univ Technol, Auhui Prov Key Lab Aerosp Struct Parts Forming Te, Hefei 230009, Peoples R China

[4] Shanghai Inst Aerosp Syst Engn, Shanghai 201109, Peoples R China

来源：

SMART MATERIALS AND STRUCTURES | 2022年 / 31卷 / 06期

基金：

中国国家自然科学基金;

关键词：

dielectric elastomer actuator; sound insulator; abrupt stiffness shift; frequency shift; bistable structure; SOFT ROBOT; MEMBRANE;

D O I：

10.1088/1361-665X/ac6a2e

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Aiming at noise isolation in low frequency range, this paper presents a novel kind of membrane sound insulator featuring a bistable actuation, by combining magnets and multilayer dielectric elastomer actuator (DEA). With a critical applied voltage on DEA, it deforms and the magnets attract in terms of a bistable snapping, which leads to an abrupt stiffness shift, and consequently regulates the sound transmission loss peak frequency. An electromechanical model is established to reveal the bistable characteristics and to study the effect of voltage and structure parameters for design optimization. The sound-insulation measurement experiment verifies the tunable acoustic performance. The sound-insulation peak frequency has a maximum shift of 142, 130, and 141 Hz under voltages of 2000, 2500, and 3000 V, respectively, showing an advancing figure of merit compared with the existed acoustic metamaterial based on dielectric elastomer.

引用

页数：14

共 45 条

[1] A robust actively-tunable perfect sound absorber [J].