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SPIE会议 EI号码检索 初始悬赏金币 5 个 Acoustic Metamaterial with Negative Parameter 作者hongwei sun 2014 SPIE NDE会议 |
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Record 1 from Compendex for: ((Acoustic Metamaterial with Negative Parameter) WN TI), 1969-2015 Check record to add to Selected Records 1. Add to selected records Accession number: 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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