Effect of a vibrating substructure on acoustic radiation from a cylindrical shell

J. D. Achenbach, J. Bjarnason, T. Igusa

Research output: Contribution to journalArticlepeer-review

Abstract

The presence of a substructure in a cylindrical shell gives rise to dynamic interactions, including resonance effects, which have an influence on the radiated acoustic field. The lowest mode of the substructure may interact vigorously with a higher order mode of the shell. In this paper a Lagrangian formulation is used to analyze the forced motion of the immersed shell/substructure system. In addition, the frequency window method is used to reduce the complexity of the resulting expressions and to obtain approximate solutions in a frequency range of interest. The particular example is concerned with a spring-mass system, which is attached to the shell. Three cases of forced harmonic motion are considered. The radiated pressure is computed as a function of the frequency. The radiated pressure for the shell/substructure system is compared with that for a shell without an oscillator subjected to the same input force.

Original languageEnglish (US)
Pages (from-to)312-318
Number of pages7
JournalJournal of Vibration and Acoustics, Transactions of the ASME
Volume114
Issue number3
DOIs
StatePublished - Jul 1992
Externally publishedYes

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

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