微型週期性結構聲波頻溝理論分析與微機電實驗(1/2)
Date Issued
2004-07-31
Date
2004-07-31
Author(s)
DOI
922212E002058
Abstract
The purpose of the research is to study
the characteristics of the acoustic band gaps
in the two-dimensional phononic crystals.
The phononic crystal is a kind of periodic
elastic material structure that there are some
band gaps in which the elastic wave
propagation of particular frequency is
forbidden. The phenomena of band gaps are
studied by using the plane wave expansion
(PWE) and finite difference time domain
(FDTD) methods. The personal computer
clusters are adjusted to meet the
requirements of RAM and CPU time. Base
on the clusters, the parallel calculated
program of PWE method is developed and
discussed. On the other hand, the FDTD
method is developed and used to calculate
the propagating phenomena of bulk acoustic
waves in two-dimensional phononic crystals.
These methods and calculated results
provide useful guidelines for the design of a
phononic crystal device as a frequency filter.
Subjects
Phononic crystals
Band gaps
Cluster
Plane wave expansion method
Finite difference time domain
SAW
Publisher
臺北市：國立臺灣大學應用力學研究所
Type
report
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