Formation of vibration attenuation in plate by inserting acoustic black hole indentations without damping layer treatment

Bing Han, Hongli Ji, Jinhao Qiu, Li Cheng

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

1 Citation (Scopus)

Abstract

In the present paper, two-dimensional (2D) ABHs are used to attenuate vibration while discarding the dissipation of damping materials. The vibration transmission properties of finite-size plate with embedded different number of ABHs are numerically investigated below the characteristic frequency of ABH element while leaving the damping layer treatment out of account. Simulation results show that the broadband attenuation feature of the considered finite-size plates with embedded ABHs is improved below the characteristic frequency with the number of ABH cell increasing, which really highlights the advantage of multiple 2D ABH indentations for vibration attenuation. Analyses reveal the physical mechanism of generating vibration attenuation and broadening attenuation band. The appearance of attenuation is attributed to the offset effect among modal responses dominated by the phase difference. The attenuation bandwidth depends on the transformation of mode frequencies caused by altering the placement of ABH indentations. The reported phenomena will enrich the existing knowledge on energy distribution in similar ABH systems for vibration suppression and energy harvesting

Original languageEnglish
Title of host publicationProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019
PublisherCanadian Acoustical Association
ISBN (Electronic)9781999181000
Publication statusPublished - 1 Jan 2019
Event26th International Congress on Sound and Vibration, ICSV 2019 - Montreal, Canada
Duration: 7 Jul 201911 Jul 2019

Publication series

NameProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019

Conference

Conference26th International Congress on Sound and Vibration, ICSV 2019
CountryCanada
CityMontreal
Period7/07/1911/07/19

Keywords

  • Acoustic black hole
  • Modal superposition
  • Vibration attenuation

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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