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【答案】应助回帖
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感谢参与，应助指数 +1
sunhw_hit: 金币+5, ★★★★★最佳答案 2014-06-23 11:19:22
sunshan4379: 检索EPI+1, 感谢应助！ 2014-06-23 12:01:45
Record 1 from Compendex for: ((Acoustic Metamaterial with Negative Parameter) WN TI), 1969-2015
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20142417802468
Title: Acoustic metamaterial with negative parameter
Authors: Sun, Hongwei1, 2 Email author sunhongwei_china@126.com; Yan, Fei1; Gu, Hao1; Li, Ying2
Author affiliation: 1 Jiangsu Automation Research Institute, Lianyungang 222006, China
2 Nanjing University of Science and Technology, Nanjing 210094, China
Corresponding author: Sun, H. (sunhongwei_china@126.com)
Source title: Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title: Proc SPIE Int Soc Opt Eng
Volume: 9063
Monograph title: Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014
Issue date: 2014
Publication year: 2014
Article number: 906324
Language: English
ISSN: 0277786X
E-ISSN: 1996756X
CODEN: PSISDG
ISBN-13: 9780819499899
Document type: Conference article (CA)
Conference name: Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014
Conference date: March 10, 2014 - March 13, 2014
Conference location: San Diego, CA, United states
Conference code: 105369
Sponsor: American Society of Mechanical Engineers; The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher: SPIE
Abstract: In this paper we present theoretical results on an acoustic metamaterial beam and a bar that exhibit negative effective mass and negative effective stiffness. A one-dimensional acoustic metamaterial with an array of spring-mass subsystems was fabricated. The frequency of the acoustic one dimensional metamaterial structure has the same form as that of the permittivity in metals due to the plasma oscillation. We also provide a theory to explain the simulation results. And we use the concept of conventional mechanical vibration absorbers to reveal the actual working mechanism of the acoustic metamaterials. We explain the two vibrate modes which are optical mode and acoustic mode in detail. When the incoming elastic wave in the acoustic metamaterials to resonate the integrated spring-mass-damper absorbers to vibrate in their optical mode at frequencies close to but above their local resonance frequencies to create shear forces and bending moments to straighten the beam and stop the wave propagation. Moreover, we explain the negative parameter in acoustic metamaterials. © 2014 SPIE.
Number of references: 22
Main heading: Metamaterials
Controlled terms: Aerospace engineering - Elastic waves - National security - Nondestructive examination - Plasma oscillations - Security systems - Stiffness - Wave propagation
Uncontrolled terms: Acoustic metamaterial - Acoustic metamaterials - Effective stiffness - Metamaterial structures - Negative effective mass - Negative mass - Negative stiffness - Spring mass
Classification code: 404.1 Military Engineering - 421 Strength of Building Materials; Mechanical Properties - 658 Aerospace Engineering, General - 711 Electromagnetic Waves - 751.1 Acoustic Waves - 914.1 Accidents and Accident Prevention - 932.3 Plasma Physics - 951 Materials Science
DOI: 10.1117/12.2035707
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc. |
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