Stiffness and Damping Identification from Full Field Measurements on Vibrating Plates |
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Authors: | A Giraudeau B Guo F Pierron |
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Institution: | (1) Laboratoire de Mécanique et Procédés de Fabrication (JE 2381), Ecole Nationale Supérieure d’Arts et Métiers, Rue Saint-Dominique, BP 508, 51006 Chalons-en-Champagne Cedex, France |
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Abstract: | The paper presents an experimental application of a method leading to the identification of the elastic and damping material
properties of isotropic vibrating plates. The theory assumes that the searched parameters can be extracted from curvature
and deflection fields measured on the whole surface of the plate at two particular instants of the vibrating motion. The experimental
application consists in an original excitation fixture, a particular adaptation of an optical full-field measurement technique,
a data preprocessing giving the curvature and deflection fields and finally in the identification process using the Virtual
Fields Method (VFM). The principle of the deflectometry technique used for the measurements is presented. First results of
identification on an acrylic plate are presented and compared to reference values. Results are discussed and improvements
of the method are proposed. |
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Keywords: | Identification Virtual fields method Damping Forced vibrations Optical measurements Grid method Deflectometry Slope fields |
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