Back to Search
Start Over
Low-frequency band gap of locally resonant phononic crystals with a dual-base plate
- Source :
- The Journal of the Acoustical Society of America. 143:1326-1332
- Publication Year :
- 2018
- Publisher :
- Acoustical Society of America (ASA), 2018.
-
Abstract
- To achieve a wider band gap and a lower cut-on frequency, a locally resonant phononic crystal (LRPC) with a dual-base plate is investigated in this paper. Compared with the LRPC with a single plate, the band structure of the LRPC with a dual-base plate is calculated using the method of plane wave expansion and verified by the finite element method. According to the analysis of the band curves of the LRPC with a dual-base plate, the mechanisms are explained. Next, the influences of the thickness of the plates, the stiffness of the springs, the mass of resonators, and the lattice constant are also investigated. The results show that the structural asymmetry between the upper and the lower plate is conducive to reducing the cut-on frequency and broadening the band gap effectively. The results indicate a different approach for the application of LRPC in vibration and noise control.
- Subjects :
- Materials science
Acoustics and Ultrasonics
Condensed matter physics
Band gap
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Finite element method
Vibration
Resonator
Lattice constant
Arts and Humanities (miscellaneous)
0103 physical sciences
Plane wave expansion
010306 general physics
0210 nano-technology
Electronic band structure
Structural acoustics
Subjects
Details
- ISSN :
- 00014966
- Volume :
- 143
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi.dedup.....829a1a77383d9293b6c346e42c59bd4b
- Full Text :
- https://doi.org/10.1121/1.5025041