The Existence of Simultaneous Bragg and Locally Resonant Band Gaps in Composite Phononic Crystal

被引：17
|
作者：
Xu Yan-Long [1 ]
Chen Chang-Qing [2 ,3 ]
Tian Xiao-Geng [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Struct Strength & Vibrat, Xian 710049, Peoples R China
[2] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
[3] Tsinghua Univ, CNMM, Beijing 100084, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2013年 / 30卷 / 04期
基金：
中国国家自然科学基金;
关键词：
2-DIMENSIONAL LATTICE; ACOUSTIC-WAVES; DEFECT STATES;
D O I：
10.1088/0256-307X/30/4/044301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The band structure and transmission coefficient of the two-dimensional ternary locally resonant phononic crystal are computed by the finite element method with the calculated frequency up to 120 kHz. The band gap in the high frequency range is found and considered as the Bragg band gap in the locally resonant phononic crystal which has the locally resonant band gap in the low frequency range normally. Then, a composite phononic crystal by hybridizing the Bragg scattering phononic crystal and the locally resonant phononic crystal is proposed. Simultaneous Bragg and locally resonant band gaps are displayed and discussed for the composite phononic crystal. The results show that the simultaneous Bragg band gap and locally resonant band gap can be tuned.
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页数：5
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