Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier. (2017-2018 à 2018-2019)

The Laboratory for Acoustics and Vibration Analysis (LAVA), at École Polytechnique de Montréal, andx000D
Comtek, a Canadian company based in Burlington, are combining their expertise to develop new solutions forx000D
sound attenuation in sandwich floor panels used in regional and business jets. Composite floor panels are madex000D
of lightweight core sandwiched between two thin skins having high tensile stiffness. Such design leads to lightx000D
structures with exceptional flexural properties. However, the lightness of the panels facilitate the propagationx000D
of the acoustic and mechanical vibration causing passenger discomfort, and failure of electronic systems.x000D
Sound attenuation in such sandwich structures can be achieved through modification of the constructionx000D
parameters such as thickness, density of the core and/or the skin. Moreover a good scientific understanding ofx000D
the sound attenuation mechanism is needed to correlate experimental measurements.x000D
In this collaborative project, an analytical model will be created to predict the acoustic properties of compositex000D
sandwich panels. The main purpose is to investigate and understand the relationship between the physicalx000D
parameters of the panels and the sound transmission loss (STL). Thus, a range of parameters known to improvex000D
acoustic properties such as the core shear modulus and the density of the core will be used as inputs to thex000D
model. Experimental data collected from a previous Engage project will be used to validate the model. Such ax000D
combined approach will provide Comtek with valuable design tool to develop custom made floor panels withx000D
enhanced acoustic properties for the aeronautic industry.