Broadband Acoustic Transmission Enhancement through a Structured Stiff Plate with Locally Resonant Elements  

作　　者：LI Yong LIANG Bin ZOU Xin-Ye CHENG Jian-Chun 李勇;梁彬;邹欣晔;程建春(Key Laboratory of Modern Acoustics,MOE,Institute of Acoustics,Department of Physics,Nanjing University,Nanjing 210093;State Key Laboratory of Acoustics,Chinese Academy of Sciences,Beijing 100190)

机构地区：[1]Key Laboratory of Modern Acoustics,MOE,Institute of Acoustics,Department of Physics,Nanjing University,Nanjing 210093 [2]State Key Laboratory of Acoustics,Chinese Academy of Sciences,Beijing 100190

出　　处：《Chinese Physics Letters》2012年第11期123-126,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10904068,10834009,11174138,11174139;Research Fund for the Doctoral Program(for new scholar)of Higher Education of China under Grant No 20100091120039;A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：Broadband acoustic transmission enhancement(ATE)is realized for a periodically structured stiff plate without any opening that is conventionally thought to be only capable of supporting narrowband ATE,by introducing locally resonant(LR)elements.This exotic phenomenon is interpreted by analyzing the vibration pattern of the structure-induced LR modes,and is well modeled by a simple"spring-mass"system which reveals the contribution of the LR effect to the important broadband performance.Our findings should help to better understand the physical mechanism of ATE and may have potential impact on ultrasonic applications such as broadband acoustic filters or compact acoustic devices in subwavelength scale.

关 键 词：LOCALLY RESONANT STIFF 

分 类 号：O42[理学—声学]