期刊
COMPOSITE STRUCTURES
卷 176, 期 -, 页码 294-303出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2017.05.048
关键词
-
资金
- National Natural Science Foundation of China [11272126, 51435006, 51421062]
- Fundamental Research Funds for the Central Universities
- HUST [2016JCTD114, 2015TS121]
- China Scholarship Council [201606165026, 201606160045]
We propose a new type of phononic crystal (PnC) composed of a periodic alternation of circular cavity sandwich plates. In the low-frequency regime, the crystal can modulate the propagation of flexural waves. Governing equations are deduced basing on the classical theory of coupled extensional and flexural vibrations of plates. The dispersion relation of the infinite PnC is calculated by combining the transfer matrix method with Bloch theory. The dynamic response of the PnC with finite unit cells is further studied with finite element analysis. An experiment is carried out to demonstrate the performance of the PnC in vibration isolation. Numerical results and experimental results both illustrate that the proposed PnC can generate several wide low-frequency Bragg band gaps providing strong attenuation. The dependence of band gaps upon geometric and material parameters is also analyzed in detail in view of vibration isolation applications. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据