## 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 language | English (US) |
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Pages (from-to) | 23-29 |

Number of pages | 7 |

Journal | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |

Volume | 231 |

State | Published - 1992 |

Event | 1992 Pressure Vessels and Piping Conference - New Orleans, LA, USA Duration: Jun 21 1992 → Jun 25 1992 |

## All Science Journal Classification (ASJC) codes

- Mechanical Engineering