A fully coupled electromechanical model for a PZT-coated acoustic black hole beam

Linli Zhang, Li Cheng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The Acoustic Black Hole (ABH) phenomenon exhibits obvious wave retarding and energy focusing when bending waves propagate inside a structure whose thickness is tailored according to a power-law relationship. These appealing features offer new opportunities for effective wave manipulation and energy harvesting (EH). Using a PZT-coated ABH beam as a benchmark, this paper proposes an improved semi-analytical model based on Timoshenko deformation assumption. The model considers the high-frequency shear effects of the beam alongside the full electromechanical coupling between the host beam and the PZT patches. Comparisons with FEM and experimental results show the model offers improved accuracy as compared with the previous Euler-Bernoulli model. This improved accuracy, which can be achieved through including a small number of decomposition terms relating to the rotational angle of the cross section of the beam, proves to be necessary to truthfully describe the increasing dynamics of the ABH beam, especially near the tip region, which is a critical area for EH. Meanwhile, the model allows straightforward integration of any external electrical modules, conducive to studies such as their interaction with the host ABH structures as well as the design of efficient energy harvesting systems.

Original languageEnglish
Title of host publicationProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
EditorsJin Yong Jeon
PublisherKorean Society of Noise and Vibration Engineering
Pages5288-5299
ISBN (Electronic)9788994021362
Publication statusPublished - 23 Aug 2020
Event49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020 - Seoul, Korea, Republic of
Duration: 23 Aug 202026 Aug 2020

Publication series

NameProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020

Conference

Conference49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020
Country/TerritoryKorea, Republic of
CitySeoul
Period23/08/2026/08/20

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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