Two-Dimensional Phononic Crystal Simulation and Analysis

Electrical & Computer Engineering;phononic;acoustic;band;gap;crystal

Norris, Ryan

University of Waterloo

关键词: Electrical & Computer Engineering;    phononic;    acoustic;    band;    gap;    crystal;   

Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/2792/1/rcnorris2006.pdf

瑞士|英语

来源: UWSPACE Waterloo Institutional Repository

【 摘 要 】

This thesis presents the design of a two-dimensional phononic band gap crystal simulator, and phononic crystal analysis.

Phononic crystals and their application tomicrowave acoustic filters are studied. Wave mechanics is introduced. A two-dimensional phononic crystal simulator is developed. Simulator operation is validated through comparison with published data. Design parameters for phononic crystal band gap engineering are outlined. Digital signal processing and wave mechanics are utilized to analyze fractal and circular inclusion based phononic crystals. Topics for further study are given.

Phononic crystal band structure is found to be sensitive to inclusion boundary geometry. Fractal inclusion based crystals provide multiple pass band characteristics. The evolution of a fractal inclusion in a phononic crystal may cause band gap widening and the formation of new band gaps. Circular inclusion based phononic crystals have piecewise-linear phase characteristics and quality factors up to 600.