Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements
This paper presents an experimental method especially adapted for the computation of structural power flow using spatially dense vibration data measured with scanning laser Doppler vibrometers. In the proposed method, the operational deflection shapes measured over the surface of the structure are c...
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| Format: | Article |
| Language: | English |
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Wiley
1998-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/1998/738387 |
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| author | J.R.F. Arruda P. Mas |
| author_facet | J.R.F. Arruda P. Mas |
| author_sort | J.R.F. Arruda |
| collection | DOAJ |
| description | This paper presents an experimental method especially adapted for the computation of structural power flow using spatially dense vibration data measured with scanning laser Doppler vibrometers. In the proposed method, the operational deflection shapes measured over the surface of the structure are curve-fitted using a two-dimensional discrete Fourier series approximation that minimizes the effects of spatial leakage. From the wavenumber-frequency domain data thus obtained, the spatial derivatives that are necessary to determine the structural power flow are easily computed. Divergence plots are then obtained from the computed intensity fields. An example consisting of a rectangular aluminum plate supported by rubber mounts and excited by a point force is used to appraise the proposed method. The proposed method is compared with more traditional finite difference methods. The proposed method was the only to allow the localization of the energy source and sinks from the experimental divergence plots. |
| format | Article |
| id | doaj-art-3dfbcc37bac54b01b3249a7f9f6eec5a |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 1998-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-3dfbcc37bac54b01b3249a7f9f6eec5a2025-02-03T01:32:05ZengWileyShock and Vibration1070-96221875-92031998-01-015423525310.1155/1998/738387Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer MeasurementsJ.R.F. Arruda0P. Mas1Departamento de Mecânica Computacional, Universidade Estadual de Campinas, Cidade Universitária “Zeferino Vaz”, FEM-UNICAMP-Caixa Postal 6122, CEP 13083-970 Campinas, SP, BrazilDepartment of Mechanical Engineering, Katholieke Universiteit Leuven, Leuven, BelgiumThis paper presents an experimental method especially adapted for the computation of structural power flow using spatially dense vibration data measured with scanning laser Doppler vibrometers. In the proposed method, the operational deflection shapes measured over the surface of the structure are curve-fitted using a two-dimensional discrete Fourier series approximation that minimizes the effects of spatial leakage. From the wavenumber-frequency domain data thus obtained, the spatial derivatives that are necessary to determine the structural power flow are easily computed. Divergence plots are then obtained from the computed intensity fields. An example consisting of a rectangular aluminum plate supported by rubber mounts and excited by a point force is used to appraise the proposed method. The proposed method is compared with more traditional finite difference methods. The proposed method was the only to allow the localization of the energy source and sinks from the experimental divergence plots.http://dx.doi.org/10.1155/1998/738387 |
| spellingShingle | J.R.F. Arruda P. Mas Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements Shock and Vibration |
| title | Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements |
| title_full | Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements |
| title_fullStr | Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements |
| title_full_unstemmed | Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements |
| title_short | Localizing Energy Sources and Sinks in Plates Using Power Flow Maps Computed From Laser Vibrometer Measurements |
| title_sort | localizing energy sources and sinks in plates using power flow maps computed from laser vibrometer measurements |
| url | http://dx.doi.org/10.1155/1998/738387 |
| work_keys_str_mv | AT jrfarruda localizingenergysourcesandsinksinplatesusingpowerflowmapscomputedfromlaservibrometermeasurements AT pmas localizingenergysourcesandsinksinplatesusingpowerflowmapscomputedfromlaservibrometermeasurements |