Applied Mathematics and Mechanics (English Edition) ›› 2023, Vol. 44 ›› Issue (8): 1241-1262.doi: https://doi.org/10.1007/s10483-023-3015-7

• 论文 • 上一篇    下一篇

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

S. H. JO1, D. LEE2   

  1. 1. Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 04620, Republic of Korea;
    2. Department of Mechanical Engineering, Seoul National University, Seoul 08826, Republic of Korea
  • 收稿日期:2023-03-02 修回日期:2023-05-26 发布日期:2023-07-27
  • 通讯作者: S. H. JO, E-mail: soohojo@dgu.ac.kr
  • 基金资助:
    the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education (No. 2022R1I1A1A0105640611)

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

S. H. JO1, D. LEE2   

  1. 1. Department of Mechanical, Robotics, and Energy Engineering, Dongguk University, Seoul 04620, Republic of Korea;
    2. Department of Mechanical Engineering, Seoul National University, Seoul 08826, Republic of Korea
  • Received:2023-03-02 Revised:2023-05-26 Published:2023-07-27
  • Contact: S. H. JO, E-mail: soohojo@dgu.ac.kr
  • Supported by:
    the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education (No. 2022R1I1A1A0105640611)

摘要: This paper proposes a method to amplify the performance of a flexuralwave-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 performance. The proposed analytical model is based on the Euler-Bernoulli beam theory. The proposed analytical approach, inspired by the transfer matrix and S-parameter methods, is used to perform band-structure and timeharmonic 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 defectband frequency, compared with a system without the PnC. Moreover, design guidelines for piezoelectric-defect-introduced PnCs are provided by analyzing the changes in wavegeneration performance that arise depending on the defect location.

关键词: phononic crystal(PnC), defect, wave-generation, flexural wave, analytical model

Abstract: This paper proposes a method to amplify the performance of a flexuralwave-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 performance. The proposed analytical model is based on the Euler-Bernoulli beam theory. The proposed analytical approach, inspired by the transfer matrix and S-parameter methods, is used to perform band-structure and timeharmonic 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 defectband frequency, compared with a system without the PnC. Moreover, design guidelines for piezoelectric-defect-introduced PnCs are provided by analyzing the changes in wavegeneration performance that arise depending on the defect location.

Key words: phononic crystal(PnC), defect, wave-generation, flexural wave, analytical model

中图分类号: 

APS Journals | CSTAM Journals | AMS Journals | EMS Journals | ASME Journals