Applied Mathematics and Mechanics (English Edition) ›› 2020, Vol. 41 ›› Issue (3): 425-438.doi: https://doi.org/10.1007/s10483-020-2586-5

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Electro-mechanical coupling wave propagating in a locally resonant piezoelectric/elastic phononic crystal nanobeam with surface effects

Denghui QIAN   

  1. Jiangsu Province Key Laboratory of Structure Engineering, College of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu Province, China
  • 收稿日期:2019-09-09 修回日期:2019-12-09 出版日期:2020-03-01 发布日期:2020-02-17
  • 通讯作者: Denghui QIAN E-mail:dhqian@usts.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (No. 11847009) and the Natural Science Foundation of Suzhou University of Science and Technology (No. XKQ2018007)

Electro-mechanical coupling wave propagating in a locally resonant piezoelectric/elastic phononic crystal nanobeam with surface effects

Denghui QIAN   

  1. Jiangsu Province Key Laboratory of Structure Engineering, College of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu Province, China
  • Received:2019-09-09 Revised:2019-12-09 Online:2020-03-01 Published:2020-02-17
  • Contact: Denghui QIAN E-mail:dhqian@usts.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (No. 11847009) and the Natural Science Foundation of Suzhou University of Science and Technology (No. XKQ2018007)

摘要: The model of a "spring-mass" resonator periodically attached to a piezoelectric/elastic phononic crystal (PC) nanobeam with surface effects is proposed, and the corresponding calculation method of the band structures is formulized and displayed by introducing the Euler beam theory and the surface piezoelectricity theory to the plane wave expansion (PWE) method. In order to reveal the unique wave propagation characteristics of such a model, the band structures of locally resonant (LR) elastic PC Euler nanobeams with and without resonators, the band structures of LR piezoelectric PC Euler nanobeams with and without resonators, as well as the band structures of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on PZT-4, with resonators attached on epoxy, and without resonators are compared. The results demonstrate that adding resonators indeed plays an active role in opening and widening band gaps. Moreover, the influence rules of different parameters on the band gaps of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on epoxy are discussed, which will play an active role in the further realization of active control of wave propagations.

关键词: locally resonant (LR) piezoelectric/elastic phononic crystal (PC) nanobeam, surface effect, plane wave expansion (PWE) method, spring-mass resonator

Abstract: The model of a "spring-mass" resonator periodically attached to a piezoelectric/elastic phononic crystal (PC) nanobeam with surface effects is proposed, and the corresponding calculation method of the band structures is formulized and displayed by introducing the Euler beam theory and the surface piezoelectricity theory to the plane wave expansion (PWE) method. In order to reveal the unique wave propagation characteristics of such a model, the band structures of locally resonant (LR) elastic PC Euler nanobeams with and without resonators, the band structures of LR piezoelectric PC Euler nanobeams with and without resonators, as well as the band structures of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on PZT-4, with resonators attached on epoxy, and without resonators are compared. The results demonstrate that adding resonators indeed plays an active role in opening and widening band gaps. Moreover, the influence rules of different parameters on the band gaps of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on epoxy are discussed, which will play an active role in the further realization of active control of wave propagations.

Key words: locally resonant (LR) piezoelectric/elastic phononic crystal (PC) nanobeam, surface effect, plane wave expansion (PWE) method, spring-mass resonator

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