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Study on energy propagation and noise radiation in plates containing the array of acoustic black holes

  • Beihang University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The vehicle body panel containing acoustic black hole indentations is potential to solve the contradiction between the structural lightweight and the control of vibration and noise. In this paper, a finite element plate model containing the array of five ABH indentations is established and simulated, and the power flow method is introduced to analyze the energy propagation characteristics arising from ABH effect. Then the average vibration power density in different plate sections is calculated to quantitatively study the energy focalization effect. Next, the plate model containing ABH indentations with damping layer and their energy dissipation effects are investigated. Finally, the radiated sound power levels of the structures under a given excitation are also calculated and discussed. This work is helpful to understand the characteristics of plates containing ABH array in reducing vibration and noise radiation.

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
ISBN (Electronic)9788994021362
StatePublished - 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

Keywords

  • Acoustic black hole
  • Energy focalization
  • Noise control
  • Power flow
  • Vibration

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