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    题名 作者 年代 出处 被引量
1低频弹性波超材料的若干进展显示文摘超材料是一类新兴的具有超常物理性质的人造周期/拟周期材料,能够改变电磁波、声波以及弹性波等在介质中的传播特性.因在航天、国防以及民用科学等方面的巨大应用潜力,超材料自被提出后便受到极大的关注并引发研究热潮.弹性波超材料是超材料的一种,能够基于弹性波与超材料结构的相互耦合作用实现对弹性波的操控.带隙是评估弹性波超材料实现弹性波操控的重要工具,其性质与超材料的材料参数、晶格常数以及局域振子的固有频率相关.受制于超材料的承载能力、外观尺寸以及局域振子结构等因素,利用传统超材料开启低频(约100 Hz)弹性波带隙依然存在较大困难.文章首先简要介绍超材料开启弹性波带隙的基本原理,然后从低频弹性波超材料基本结构与低频带隙实现方法、低频带隙优化与调控策略、低频带隙潜在应用等三个方面详细总结低频弹性波超材料的研究工作.其中,低频带隙超材料的基本结构主要包括布拉格散射型超材料、传统局域共振型超材料以及准零刚度局域共振超材料.文章通过总结低频弹性波超材料的研究进展,分析了目前研究中的不足并对未来低频弹性波的研究方向进行了展望.王凯 周加喜 蔡昌琦 徐道临 文桂林 2022力学学报2022,54,10:4
2周期结构振动带隙特性优化研究进展显示文摘周期结构(声子晶体或超材料结构)拥有良好的振动带隙特性,从而达到减振降噪的目的。在应用过程中,针对不同减振频率需求,需要对其振动带隙特性进行优化以达到应用需求。本文论述了周期结构振动带隙特性优化的研究进展,介绍了通过对单胞构型、结构尺寸及材料参数等进行优化,以改进此类结构的振动带隙特性,达到不同减振需求的设计及研究方法,展望了振动带隙特性优化的研究前景及思路。周期结构振动带隙特性优化能够有效提升结构的减振特性,有较好的应用前景。熊远皓 李凤明 张传增 2022哈尔滨工程大学学报2022,43,9:1
3A brief review of metamaterials for opening low-frequency band gaps显示文摘Metamaterials are an emerging type of man-made material capable of obtaining some extraordinary properties that cannot be realized by naturally occurring materials.Due to tremendous application foregrounds in wave manipulations,metamaterials have gained more and more attraction.Especially,developing research interest of low-frequency vibration attenuation using metamaterials has emerged in the past decades.To better understand the fundamental principle of opening low-frequency(below 100 Hz)band gaps,a general view on the existing literature related to low-frequency band gaps is presented.In this review,some methods for fulfilling low-frequency band gaps are firstly categorized and detailed,and then several strategies for tuning the low-frequency band gaps are summarized.Finally,the potential applications of this type of metamaterial are briefly listed.This review is expected to provide some inspirations for realizing and tuning the low-frequency band gaps by means of summarizing the related literature.Kai WANG Jiaxi ZHOU Dongguo TAN Zeyi LI Qida LIN Daolin XU 2022Applied Mathematics and Mechanics(English Edition)2022,43,7:0
4Theoretical Modeling and Analysis of Vibroacoustic Characteristics of an Acoustic Metamaterial Plate显示文摘Locally resonant metamaterial plates with subwavelength bandgaps can be exploited for the simultaneous control of structural vibrations and acoustic radiation.The present work theoretically investigates the vibroacoustic characteristics of a metamaterial plate with periodic lateral local resonance.The high accuracy of the presented method is evident from the consistency of the cross mobility of the metamaterial plate calculated with the finite element technique.The modal superposition approach and Rayleigh integral technique are adopted to formulate the mean square velocity and acoustic radiation power in terms of the structural deflection and sound pressure to capture the vibroacoustic coupling characteristics of the metamaterial plate and the surrounding environment.Large vibration suppression and sound reduction with high radiation efficiency can be observed within the frequency ranges of interest.The near-field sound intensity and far-field acoustic pressure distributions inside and outside the bandgaps are plotted and analyzed.The results from this work can be utilized to set design guidelines for metamaterial design to achieve prescribed vibroacoustic characteristics.Ting Wang Hanbei Guo Meixia Chen Wenkai Dong 2022Acta Mechanica Solida Sinica2022,35,5:0
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