Definition of a high-frequency threshold for plates and acoustical spaces

G. Rabbiolo, R. J. Bernhard, F. A. Milner

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

An extension of the modal overlap factor is introduced that includes ensemble variations and frequency averaging of plates and acoustic spaces. Uniformly and normally distributed variations of geometric and material parameters are considered. Using this modal overlap factor, approximate formulas are derived to identify the limit of predictability for the combined case of damping, ensemble variation, and frequency averaging. The extended modal overlap factor is used to define a high-frequency threshold for plates and acoustical spaces that depends on system parameters and their variations as well as on damping, and the bandwidth of frequency averaging. Monte-Carlo simulations are shown to illustrate and validate the results.

Original languageEnglish (US)
Pages (from-to)647-667
Number of pages21
JournalJournal of Sound and Vibration
Volume277
Issue number4-5
DOIs
StatePublished - Nov 5 2004
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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