Band-Gap Engineering of Elastic Waveguides Using Periodic Materials
Band-Gap Engineering of Elastic Waveguides Using Periodic Materials
复制标题
使用周期性材料的弹性波导的带隙工程
DOI：
10.1115/imece2003-41886
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发表时间：
2003
影响因子：
5.5
通讯作者：
R. Scott
中科院分区：
文献类型：
--
作者：
M. Hussein;G. Hulbert;R. Scott
在周期性非均匀材料中，波在组成材料界面上发生散射，从而在称为带隙的特定频率范围内产生整体波衰减效应。这一现象可用于开发具有定制动力特性的结构。在这项工作中，周期材料被用来合成有界结构中的弹性波导管。描述了基本的局部-全局设计过程，并研究了形成导轨“墙”的周期单元数目的影响。用强迫振动分析表明，仅用三个或四个周期单元格，就能达到形成导轨所需的波衰减能力。版权所有？ASME？2003
Within periodically heterogeneous materials, wave scattering takes place across constituent material interfaces in such a way that an overall wave attenuation effect arises at certain frequency ranges known as band gaps. This phenomenon can be utilized in developing structures with tailored dynamic characteristics. In this work, periodic materials are used to synthesize elastic waveguides within bounded structures. The underlying local-global design process is described, and the effect of the number of periodic cells used to form the guide “wall” is studied. Using forced vibration analysis, it is shown that with only three or four periodic unit cells, the desired wave attenuation capacity required to form a guide is attained.Copyright © 2003 by ASME