Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects
The technique of processing data in the wavenumber domain based on the Spatial Fourier Transform (SFT), is a powerful tool to compute higher-order partial derivatives occurred in the expressions of the structural intensity and its divergence. However, performing directly the SFT usually results in g...
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| Format: | Article |
| Language: | English |
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Wiley
2002-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2002/850152 |
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| author | Jean-Claude Pascal Jing-Fang Li Xavier Carniel |
| author_facet | Jean-Claude Pascal Jing-Fang Li Xavier Carniel |
| author_sort | Jean-Claude Pascal |
| collection | DOAJ |
| description | The technique of processing data in the wavenumber domain based on the Spatial Fourier Transform (SFT), is a powerful tool to compute higher-order partial derivatives occurred in the expressions of the structural intensity and its divergence. However, performing directly the SFT usually results in great distortions if a discontinuity occurs in spatial periodicity (leakage effect). The worst thing is that the divergence of a free plate cannot correctly be estimated by existing wavenumber processing such as the STF and zero padding method. In this paper, a new algorithm -- mirror processing, is developed. By the use of vibrating velocity measured from the technique of laser scanning vibrometry, the structural intensity, its divergence and the force distribution are evaluated by different techniques of wavenumber processing. It is shown that the distortions caused by leakage effects can be removed by using advanced algorithms. |
| format | Article |
| id | doaj-art-751f74f01a544b9b87eecb5ecbd12f52 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2002-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-751f74f01a544b9b87eecb5ecbd12f522025-08-20T03:33:32ZengWileyShock and Vibration1070-96221875-92032002-01-0191-2576610.1155/2002/850152Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage EffectsJean-Claude Pascal0Jing-Fang Li1Xavier Carniel2Ecole Nationale Supérieure d'Ingénieurs du Mans (ENSIM) and Institut d’Acoustique et de Mécanique (IAM), Université du Maine, rue Aristote, 72000 Le Mans, FranceVisual VibroAcoustics, 51 rue d’Alger, 72000 Le Mans, FranceCentre Technique des Industries Mécaniques (CETIM), 52 avenue Felix-Louat BP 80067, 60300 Senlis, FranceThe technique of processing data in the wavenumber domain based on the Spatial Fourier Transform (SFT), is a powerful tool to compute higher-order partial derivatives occurred in the expressions of the structural intensity and its divergence. However, performing directly the SFT usually results in great distortions if a discontinuity occurs in spatial periodicity (leakage effect). The worst thing is that the divergence of a free plate cannot correctly be estimated by existing wavenumber processing such as the STF and zero padding method. In this paper, a new algorithm -- mirror processing, is developed. By the use of vibrating velocity measured from the technique of laser scanning vibrometry, the structural intensity, its divergence and the force distribution are evaluated by different techniques of wavenumber processing. It is shown that the distortions caused by leakage effects can be removed by using advanced algorithms.http://dx.doi.org/10.1155/2002/850152 |
| spellingShingle | Jean-Claude Pascal Jing-Fang Li Xavier Carniel Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects Shock and Vibration |
| title | Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects |
| title_full | Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects |
| title_fullStr | Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects |
| title_full_unstemmed | Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects |
| title_short | Wavenumber Processing Techniques to Determine Structural Intensity and Its Divergence from Optical Measurements without Leakage Effects |
| title_sort | wavenumber processing techniques to determine structural intensity and its divergence from optical measurements without leakage effects |
| url | http://dx.doi.org/10.1155/2002/850152 |
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