Abstract
Modal decomposition is used to compute the modal contributions to the sound power radiated from externally excited structures submerged in a heavy fluid. The exterior structural-acoustic problem is discretized using finite elements for the structure and boundary elements for the fluid. The structure and fluid domain models are fully coupled. The numerical technique presented here allows the individual contributions of the wet structural modes to the radiated sound power to be observed, thus providing physical insight into the vibro-acoustic problem. Two fluid-loaded structures are examined corresponding to a spherical shell and a cylindrical shell with hemi-spherical end caps. The sphere is excited by a point force and the cylinder is excited by a ring of axial or radial forces acting at one end. In each case, the individual modal contributions to the radiated sound power are presented. The individual modal contributions to the directivity of the radiated sound pressure for the cylindrical shell is also observed.
| Original language | English |
|---|---|
| Article number | 065035 |
| Journal | Proceedings of Meetings on Acoustics |
| Volume | 19 |
| DOIs | |
| State | Published - 2013 |
| Event | 21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada Duration: 2 Jun 2013 → 7 Jun 2013 |