Characterization of a dissipative assembly by structural intensity using optical measurements

Jean-Claude Pascal; Xavier Carniel; Jing-Fang Li

doi:10.1117/12.468182

22 May 2002 Characterization of a dissipative assembly by structural intensity using optical measurements

Jean-Claude Pascal, Xavier Carniel, Jing-Fang Li

Proceedings Volume 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2002) https://doi.org/10.1117/12.468182
Event: Fifth International Conference on Vibration Measurements by Laser Techniques, 2002, Ancona, Italy

Abstract

It has been shown in previous publications that it was possible to obtain from complex velocity maps obtained by optical measurements (Holography, LDV, etc. .) and wave number processing, useful quantities to study energy flows in structures: intensity, power flow, forces, localisation of sources and sinks of energy. In this paper, scanning laser vibrometer measurements on two-plate assembly are used to determine the dissipating power by the joints from these energetic quantities. The proposed method compute the average power flow over lines parallel to the junction to check a one dimensional model of power flow distribution along the other dimension. An approximate energy conservation law of flexural vibration which gives good results on beam structures is used to determine the dissipation characteristics of joints.

Citation Download Citation

Jean-Claude Pascal, Xavier Carniel, and Jing-Fang Li "Characterization of a dissipative assembly by structural intensity using optical measurements", Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); https://doi.org/10.1117/12.468182

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