Flexural-wave-generation using a phononic crystal with a piezoelectric defect

作     者：S.H.JO D.LEE S.H.JO;D.LEE

作者机构：Department of MechanicalRoboticsand Energy EngineeringDongguk UniversitySeoul 04620Republic of Korea Department of Mechanical EngineeringSeoul National UniversitySeoul 08826Republic of Korea 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2023年第44卷第8期

页      面：1241-1262页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education(No.2022R1I1A1A0105640611) 

主　　题：phononic crystal(PnC) defect wave-generation fexural wave analytical model 

摘      要：This paper proposes a method to amplify the performance of a flexural-wave-generation system by utilizing the energy-localization characteristics of a phononic crystal(PnC)with a piezoelectric defect and an analytical approach that accelerates the predictions of such wave-generation *** proposed analytical model is based on the Euler-Bernoulli beam *** proposed analytical approach,inspired by the transfer matrix and S-parameter methods,is used to perform band-structure and time-harmonic analyses.A comparison of the results of the proposed approach with those of the finite element method validates the high predictive capability and time efficiency of the proposed model.A case study is explored;the results demonstrate an almost ten-fold amplification of the velocity amplitudes of flexural waves leaving at a defect-band frequency,compared with a system without the ***,design guidelines for piezoelectric-defect-introduced PnCs are provided by analyzing the changes in wave-generation performance that arise depending on the defect location.