Band Gaps and Transmission Characteristics Analysis on a Two-Dimensional Multiple-Scatter Phononic Crystal Structure
| Autor: | Xingfu Ma, Jiawei Xiang, Hang Xiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Frequency response
Materials science band gaps Band gap finite element method 02 engineering and technology Low frequency starting frequency lcsh:Technology 01 natural sciences Article Crystal 0103 physical sciences General Materials Science lcsh:Microscopy lcsh:QC120-168.85 010302 applied physics multiple-scatter PC structure transmission characteristics lcsh:QH201-278.5 lcsh:T Attenuation Resonance 021001 nanoscience & nanotechnology Finite element method Computational physics Transmission (telecommunications) lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | Materials Volume 13 Issue 9 Materials, Vol 13, Iss 2106, p 2106 (2020) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13092106 |
| Popis: | In this paper, a novel wrap-around multi-scattering phononic crystal (PC) structure is proposed. Band gaps (BGs) and transmission characteristics of the present structure are calculated using finite element method (FEM). Through the calculations of single-scattering prototype, three complete BGs which are exhibited at low frequency and the fourth wide BG at high frequency are discovered. The transmission features and resonant spectra represented by frequency response function (FRF) shows that apparent resonance directly cause the four specific BGs. By keeping the total area of scatterers unchanged, 2 × 2, 3 × 3 and 4 × 4 scatterers are designed to obtain the change rule of BGs. Furthermore, the size ratio of 2 × 2 scatterers, the number of connection beams are investigated to obtain the regular pattern of acoustic energy transmission and attenuation. The present investigation of multiple-scatter PC structure will provide a solid support on the future design of acoustical functional materials. |
| Databáze: | OpenAIRE |
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