Développement d'UNE Méthodologie De Mesure d'INTENSITÉ De Structure Sur Des Plaques Homogènes Isotropes

Abstract

An investigation is made on the ability of a two accelerometer probe to measure structural intensity through plates. The method applies to thin homogeneous plates excited by bending waves. A finite difference approximation of a first order spatial derivative is assumed in the expression of intensity in the far field. Numerical results on infinite plate are presented, comparing general and far field formulation of intensity. Finally, an experiment on a clamped plate shows off specific information of structural intensity with comparison to acoustic intensity and modal analysis.

Development and Application of Structural Intensity on Composite Panels

“…A lot of works concern beams and isotropic thin plates [1]. The measurement of structural intensity is based on finite difference approximation [2,3,4]. Nevertheless, because of the importance of composite structures in aeronautic or car industries, the aim of this investigation is to study the ability of far field method to measure structural intensity on orthotropic multi-layered sandwich panels.…”