摘要
基于有限元方法,对一种新型的二维含非凸型孔声子晶体的带隙特性进行研究,并讨论了结构几何参数对带隙性质的影响。结果表明,结构几何参数对系统的带隙特性具有显著的影响,而合理确定几何参数可使该新型声子晶体在低频范围内打开相对较宽的完全带隙。这为声子晶体的带隙设计提供了一定的理论依据。
The bandgap characteristics of phononic crystals have a wide application prospect in vibration and noise reduction and acoustic devices.In this paper,the bandgap characteristics of a new two-dimensional non-convex hole phononic crystal were studied based on the finite element method.The influences of the geometrical parameters on the bandgap properties was also discussed.The results show that the geometrical parameters have a significant effect on the bandgap characteristics of the system.The geometrical parameters need to be determined reasonably so that the new phononic crystal can open the relatively wide full bandgap in low frequency range.This provides a theoretical basis for designing bandgap of phononic crystals.
作者
许卫锴
张蒙
宁金英
XU Wei-kai;ZHANG Meng;NING Jin-ying(Faculty of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China)
出处
《沈阳航空航天大学学报》
2018年第1期9-15,共7页
Journal of Shenyang Aerospace University
基金
国家自然科学基金(项目编号:11302135
51308357
11672187)
辽宁省自然科学基金(项目编号:201602572
201602627)
辽宁省高等学校优秀人才支持计划(项目编号:LJQ2014019
LJQ2015091)
关键词
声子晶体
带隙特性
局域共振
能带结构
phononic crystal
bandgap characteristics
local resonance
band structure
