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Journal of Applied Fluid Mechanics، جلد ۱۰، شماره ۲، صفحات ۵۶۹-۵۷۹
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عنوان انگلیسی Development of an Acoustic Metamaterials for Aero Acoustic Noise Control
چکیده انگلیسی مقاله This paper aims at proposing a novel type tunable acoustic metamaterials with complete band gap composed of piezoelectric rods (Lithium Niobate) with square array as inclusion embedded polyimide aerogel background. The plane wave expansion method and the principles of Bloch-Floquet method used to get a band frequency and study the pass band for noise control. The results of this paper provide the required guidance for designing tunable wave filters or wave guide which might be useful in high-precision mechanical systems operated in certain frequency ranges, and switches made of piezoelectric; they also propose a novel type of tunable mechanical meta composite, where is independent of wave direction and has an equal sensitivity in all directions in which reacts omnidirectional and improves the aero acoustic noise control (e.g. bladeless fans) as well as general performance of vibrating structures (e.g. wind turbine).
کلیدواژه‌های انگلیسی مقاله Acoustic band gaps, Phononic crystal, Passive control, Piezoelectricity, Low frequency regime shielding
نویسندگان مقاله S. Rezaei |
School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Tehran, P.O.Box: 4563-11155,Iran

M. Eskandari-Ghadi |
School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Tehran, P.O.Box: 4563-11155,Iran

M. Rahimian |
School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Tehran, P.O.Box: 4563-11155,Iran

نشانی اینترنتی https://www.jafmonline.net/article_457_0935b7d3316e5aea4c628f0935635fd5.pdf
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