Acoustic intensity calculations for finite element fluid-structure interaction problems

Stephen A. Hambric, Gordon C. Everstine

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

An algorithm for calculating acoustic intensities from a time-harmonic pressure field in an axisymmetric fluid region is presented. Acoustic pressures are computed in a mesh of NASTRAN triangular finite elements of revolution using an analogy relating the scalar wave equation to elasticity equations. Acoustic intensities are then calculated from pressures and pressure derivatives taken over the mesh of triangular elements. Intensities are displayed as vectors indicating the directions and magnitudes of energy flow at all mesh points in the acoustic field. A submerged prolate spheroidal shell is modeled and analyzed to illustrate the acoustic intensity method and the usefulness of energy flow paths in the understanding of the response of fluid-structure interaction problems. The structural-acoustic analogy used is summarized for completeness.

Original languageEnglish (US)
Pages (from-to)23-29
Number of pages7
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume231
StatePublished - Jan 1 1992
Event1992 Pressure Vessels and Piping Conference - New Orleans, LA, USA
Duration: Jun 21 1992Jun 25 1992

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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