Advanced NDIF Method for Eigenvalue Analysis of Arbitrarily Shaped Acoustic Cavities with the Partially Pressure-Release Boundary

S. W. Kang, Satya N. Atluri

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, an advanced non-dimensional dynamic influence function method (NDIF method) for eigenvalue analysis of arbitrarily shaped two-dimensional acoustic cavities with the mixed boundary consisting of the pressure-release and rigid-wall boundaries is proposed. The existing NDIF method has the weakness of having to calculate the singularity of the final system matrix of an analyzed acoustic cavity in the frequency band of interest to obtain the eigenvalues of the cavity because the final system matrix is dependent on the frequency. The newly proposed NDIF method in this paper provides an efficient way to extract accurate eigenvalues and eigenmodes by successfully overcoming the above weaknesses. Finally, the validity and accuracy of the proposed method are shown through verification examples.

Original languageEnglish
Article number041004
JournalJournal of Vibration and Acoustics, Transactions of the ASME
Volume143
Issue number4
DOIs
StatePublished - Aug 2021

Keywords

  • Dynamics
  • Modal analysis
  • Propagation and radiation
  • Structural acoustics

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