2022 Designing a Phononic Crystal with a Defect for Target Frequency Matching Using an Analytical Approach
본문
- Journal
- Mechanics of Advanced Materials and Structures
- Date
- 2022-07
- Citation Index
- SCIE (IF: 3.6, Rank: 17.1%)
- Vol./ Page
- Vol. 29, No. 17, pp. 2454-2467
- Year
- 2022
- Link
- http://doi.org/10.1080/15376494.2021.1953648 115회 연결
Abstract
This paper proposes a one-dimensional, defect-introduced phononic crystal design for target frequency matching. A quarter-wave stack is used as a unit cell. The supercell-technique-based transfer matrix method enables the defect’s length to be explicitly derived; this generates a defect band at the target frequency in band-structure analysis. For the verification through time-harmonic analysis, the perturbation-theory-incorporated S-parameter method is used. The results show that the proposed design enables the realization of defect-mode-induced energy localization at the desired frequency, regardless of the harmonic number, supercell size, and defect location. The proposed design is validated by numerical examples through the finite element method.