东南大学学报（英文版）2025，Vol.41Issue(2)：164-170,7.DOI:10.3969/j.issn.1003-7985.2025.02.005
弹性地基可调声子晶体板带隙与缺陷带研究
Study on band gaps and defect bands in tunable phononic crystal plates with elastic foundations
摘要
Abstract
To analyze the band gap characteristics of pho-nonic crystals,a two-dimensional phononic crystal plate model with an elastic foundation was first established.The plane wave expansion method was used to compute the dis-persion curves of this phononic crystal model,and the re-sults were compared with those from the finite element method to verify their accuracy.Subsequently,a parameter study explored the effects of the elastic foundation coeffi-cient and coverage ratio on the band gap.The results indi-cate that as the coverage ratio of the elastic foundation in-creases,the band gap significantly expands,reaching its maximum value at 100%coverage.Additionally,as the elastic foundation stiffness increases,the band gap gradu-ally widens and converges toward fixed boundary condi-tions.The study also investigated the band gap of phononic crystal plates with defects,finding that the vibrational en-ergy concentrates at the defect unit cell.Furthermore,the defect band frequency can be effectively modulated by ad-justing the coefficient of the elastic foundation,providing a theoretical basis for achieving efficient energy conversion.关键词
声子晶体/弹性地基/带隙/平面波展开法/缺陷带Key words
phononic crystals/elastic foundation/band gap/plane wave expansion method/defect band分类
力学引用本文复制引用
洪俊,高星昱,李可,王少鹏..弹性地基可调声子晶体板带隙与缺陷带研究[J].东南大学学报（英文版）,2025,41(2):164-170,7.基金项目
The National Natural Science Foundation of China(No.12002086). （No.12002086）
