Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method
© 2017 Acoustical Society of America. The non-negative intensity (NNI) method is applied to large-scale coupled fluid-structure interaction (FSI) problems using the fast multipole boundary element method (FMBEM). The NNI provides a field on the radiating structure surface that consists of positive-o...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Acoustical Society of America
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/55997 |
| _version_ | 1848759759967092736 |
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| author | Wilkes, D. Peters, H. Croaker, P. Marburg, S. Duncan, Alec Kessissoglou, N. |
| author_facet | Wilkes, D. Peters, H. Croaker, P. Marburg, S. Duncan, Alec Kessissoglou, N. |
| author_sort | Wilkes, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Acoustical Society of America. The non-negative intensity (NNI) method is applied to large-scale coupled fluid-structure interaction (FSI) problems using the fast multipole boundary element method (FMBEM). The NNI provides a field on the radiating structure surface that consists of positive-only contributions to the radiated sound power, thus avoiding the near-field cancellation effects that otherwise occur with the sound intensity field. Thus far the NNI has been implemented with the boundary element method (BEM) for relatively small problem sizes to allow for the full BEM coefficient and inverse matrices to be explicitly constructed and stored. In this work, the FMBEM is adapted to the NNI by calculating the eigenvalue solution of the symmetric acoustic impedance matrix using the FMBEM via a two-stage solution method. The FMBEM implementation of the NNI is demonstrated for a largescale model of a submerged cylindrical shell. The coupled FSI problem is first solved using a finite element-FMBEM model and the resulting surface fields are then used in the FMBEM calculation of the NNI. An equivalent reactive NNI field representing the evanescent near-field radiation is demonstrated and the effect of the chosen number eigenvectors on the NNI field is investigated. |
| first_indexed | 2025-11-14T10:05:00Z |
| format | Journal Article |
| id | curtin-20.500.11937-55997 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:05:00Z |
| publishDate | 2017 |
| publisher | Acoustical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-559972017-09-13T16:11:24Z Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method Wilkes, D. Peters, H. Croaker, P. Marburg, S. Duncan, Alec Kessissoglou, N. © 2017 Acoustical Society of America. The non-negative intensity (NNI) method is applied to large-scale coupled fluid-structure interaction (FSI) problems using the fast multipole boundary element method (FMBEM). The NNI provides a field on the radiating structure surface that consists of positive-only contributions to the radiated sound power, thus avoiding the near-field cancellation effects that otherwise occur with the sound intensity field. Thus far the NNI has been implemented with the boundary element method (BEM) for relatively small problem sizes to allow for the full BEM coefficient and inverse matrices to be explicitly constructed and stored. In this work, the FMBEM is adapted to the NNI by calculating the eigenvalue solution of the symmetric acoustic impedance matrix using the FMBEM via a two-stage solution method. The FMBEM implementation of the NNI is demonstrated for a largescale model of a submerged cylindrical shell. The coupled FSI problem is first solved using a finite element-FMBEM model and the resulting surface fields are then used in the FMBEM calculation of the NNI. An equivalent reactive NNI field representing the evanescent near-field radiation is demonstrated and the effect of the chosen number eigenvectors on the NNI field is investigated. 2017 Journal Article http://hdl.handle.net/20.500.11937/55997 10.1121/1.4983686 Acoustical Society of America restricted |
| spellingShingle | Wilkes, D. Peters, H. Croaker, P. Marburg, S. Duncan, Alec Kessissoglou, N. Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| title | Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| title_full | Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| title_fullStr | Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| title_full_unstemmed | Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| title_short | Non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| title_sort | non-negative intensity for coupled fluid-structure interaction problems using the fast multipole method |
| url | http://hdl.handle.net/20.500.11937/55997 |