Toward a theory of wave energy transport in large irregular structures

Nicholas L. Wolff, Richard L. Weaver

Research output: Contribution to journalArticlepeer-review

Abstract

An ansatz is proposed by which the energy transport behavior observed at early times in a direct numerical simulation (DNS) of a large irregular structure may be extrapolated to arbitrary times. In the slow-transport limit, this ansatz leads to a diffusion-like equation, similar to that of time-domain statistical energy analysis (SEA), but it does not require substructuring. The model is successfully used to extract diffusion parameters from simulated data of unambiguously diffusive character. The model is then successfully used to extract diffusion parameters from data obtained in a DNS of a simple undamped two-room structure of a kind typically analyzed by SEA or room acoustics.

Original languageEnglish (US)
Pages (from-to)222-231
Number of pages10
JournalJournal of the Acoustical Society of America
Volume118
Issue number1
DOIs
StatePublished - Jul 2005

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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