物理学报2012，Vol.61Issue(19)：394-401,8.
复合兰姆波声子晶体中超宽部分禁带
Large partial band-gaps for Lamb waves in multiple phononic crystals thin plates
摘要
Abstract
During the past decade, a growing attention has been paid to the Lamb waves propagating in composite plates due to a variety of applications for nondestructive evaluation, vibration attenuation and Lamb wave sensors. We present a revised plane wave expansion method and a finite element method to study the large partial band-gaps of a multiple Lamb wave phononic crystal thin plate with a symmetric mirror plane The results show that lots of partial stopbands of lower-order Lamb waves exist and can be substantially enlarged by using multiple heterostructures which consist of several pieces of phononic crystal with different ratios of the thickness (H) to the lattice period (L). These contribute to good mode choice for lower-order Lamb waves, which is believed to have much significance for optimially choosing models in Lamb wave nondestructive test and the one-way Lamb wave mode transmission.关键词
兰姆波/声子晶体/部分禁带Key words
lamb waves/phononic crystal/partial band gap分类
数理科学引用本文复制引用
丁红星,沈中华,李加,祝雪丰,倪晓武..复合兰姆波声子晶体中超宽部分禁带[J].物理学报,2012,61(19):394-401,8.基金项目
国家自然科学基金（批准号：11274175,61108013）,教育部新世纪优秀人才基金和华中科技大学鸟巢计划资助的课题. （）
