Energy transmission in a mechanically-linked double-wall structure coupled to an acoustic enclosure

Li Cheng, Y. Y. Li, J. X. Gao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

83 Citations (Scopus)


The energy transmission in a mechanically linked double-wall structure into an acoustic enclosure is studied in this paper. Based on a fully coupled vibro-acoustic formulation, focus is put on investigating the effect of the air gap and mechanical links between the two panels on the energy transmission and noise insulation properties of such structures. An approximate formula reflecting the gap effect on the lower-order coupled frequencies of the system is proposed. A criterion, based on the ratio between the aerostatic stiffness of the gap cavity and the stiffness of the link, is proposed to predict the dominant transmitting path, with a view to provide guidelines for the design of appropriate control strategies. Numerical results reveal the existence of three distinct zones, within which energy transmission takes place following different mechanisms and transmitting paths. Corresponding effects on noise insulation properties of the double-wall structure are also investigated.
Original languageEnglish
Pages (from-to)2742-2751
Number of pages10
JournalJournal of the Acoustical Society of America
Issue number5
Publication statusPublished - 1 May 2005

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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