THE INFLUENCE OF FUNCTIONALLY GRADED LAYER ON THE BAND STRUCTURES OF ONE-DIMENSIONAL PHONONIC CRYSTALS

被引：0
|
作者：
Yang, Guang-ying [1 ,2 ]
Zhang, Ming-hua [2 ]
Lou, Jia [2 ]
Lu, Meng-kai [2 ]
Wang, Ji [2 ]
Du, Jian-ke [2 ]
机构：
[1] Jiaxing Univ, Coll Civil Engn & Architecture, Jiaxing 314001, Peoples R China
[2] Ningbo Univ, Sch Mech Engn & Mech, Ningbo 315211, Peoples R China
来源：
PROCEEDINGS OF THE 2019 14TH SYMPOSIUM ON PIEZOELECTRCITY, ACOUSTIC WAVES AND DEVICE APPLICATIONS (SPAWDA19) | 2019年
基金：
中国国家自然科学基金;
关键词：
Piezoelectric phononic crystal; Love wave; Functional graded material; FEM; WAVE-PROPAGATION;
D O I：
10.1109/spawda48812.2019.9019288
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In this paper, the propagation of surface acoustic waves in a periodic structure which consists of periodic domain inversion piezoelectric substrate covered by a functionally graded layer is studied. We calculated the band structures using the finite element method. The effects of the gradient variation of material constants on the band structures are discussed in detail. Numerical analysis shows that the band gap shifts to lower frequency and the bandwidth decreases with increase of the positive gradient factor beta, whereas the band gap shifts to higher frequency and the bandwidth increase with increase of the negative gradient factor beta. Besides, the thickness of the layer also has a significant effect on the first band gap.
引用
收藏
页码：327 / 330
页数：4
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