A study of power transmission through a finite periodic dual-layer beam structure with transverse connection

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Abstract

A study of the structure-borne sound power transmission through a finite periodic dual-layer beam structure with connection branches was conducted. The results suggest that the power transmitted through the beam structure into the supporting structure depends not only on the characteristics of the source and the supporting structure, but also on the attenuation of the periodic beam elements with the coupling branches and the exciting position of the source. The results also reveal the model under the mono-coupling condition to be similar to that under the multi-coupling condition in the relatively low frequency region. The transmitted power was strongly attenuated in a number of frequency regions, and in a few regions the power was even transmitted into the second layer of the supporting structure. The analysis indicated that this study is useful in understanding the structure-borne sound transmission from the first layer into the second layer of the beam structure.
Original languageEnglish
Pages (from-to)177-188
Number of pages12
JournalJournal of Low Frequency Noise Vibration and Active Control
Volume32
Issue number3
DOIs
Publication statusPublished - 1 Sep 2013

Keywords

  • coupled longitudinal-flexural wave
  • cross-layer transmission
  • dual-layer beam
  • periodic structure

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Geophysics
  • Mechanical Engineering

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