کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8205074 | 1530578 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrawide low frequency band gap of phononic crystal in nacreous composite material
ترجمه فارسی عنوان
پرتو باند فرکانس پایین در کریستال های فونونی در مواد کامپوزیتی براق
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کلمات کلیدی
نارر، بلور فونیک، فاصله باند، جداسازی لرزش، روش عنصر محدود
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
چکیده انگلیسی
The band structure of a nacreous composite material is studied by two proposed models, where an ultrawide low frequency band gap is observed. The first model (tension-shear chain model) with two phases including brick and mortar is investigated to describe the wave propagation in the nacreous composite material, and the dispersion relation is calculated by transfer matrix method and Bloch theorem. The results show that the frequency ranges of the pass bands are quite narrow, because a special tension-shear chain motion in the nacreous composite material is formed by some very slow modes. Furthermore, the second model (two-dimensional finite element model) is presented to investigate its band gap by a multi-level substructure scheme. Our findings will be of great value to the design and synthesis of vibration isolation materials in a wide and low frequency range. Finally, the transmission characteristics are calculated to verify the results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 378, Issues 32â33, 27 June 2014, Pages 2436-2442
Journal: Physics Letters A - Volume 378, Issues 32â33, 27 June 2014, Pages 2436-2442
نویسندگان
J. Yin, J. Huang, S. Zhang, H.W. Zhang, B.S. Chen,