Reference number : GC-2017-Q1-00561, amendment number : , agreement type : G, recipient legal name : Ruiz, Eduardo (École Polytechnique de Montréal), recipient country : CA, recipient province : nan, recipient city : Quebec|Québec, recipient postal code : nan, program name english : Engage Plus Grants for Universities, program name french : Subvention d'engagement partenarial Plus pour les universités, program purpose english : The Laboratory for Acoustics and Vibration Analysis (LAVA), at École Polytechnique de Montréal, and_x000D_
Comtek, a Canadian company based in Burlington, are combining their expertise to develop new solutions for_x000D_
sound attenuation in sandwich floor panels used in regional and business jets. Composite floor panels are made_x000D_
of lightweight core sandwiched between two thin skins having high tensile stiffness. Such design leads to light_x000D_
structures with exceptional flexural properties. However, the lightness of the panels facilitate the propagation_x000D_
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 construction_x000D_
parameters such as thickness, density of the core and/or the skin. Moreover a good scientific understanding of_x000D_
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 composite_x000D_
sandwich panels. The main purpose is to investigate and understand the relationship between the physical_x000D_
parameters of the panels and the sound transmission loss (STL). Thus, a range of parameters known to improve_x000D_
acoustic properties such as the core shear modulus and the density of the core will be used as inputs to the_x000D_
model. Experimental data collected from a previous Engage project will be used to validate the model. Such a_x000D_
combined approach will provide Comtek with valuable design tool to develop custom made floor panels with_x000D_
enhanced acoustic properties for the aeronautic industry., program purpose french : The Laboratory for Acoustics and Vibration Analysis (LAVA), at École Polytechnique de Montréal, and_x000D_
Comtek, a Canadian company based in Burlington, are combining their expertise to develop new solutions for_x000D_
sound attenuation in sandwich floor panels used in regional and business jets. Composite floor panels are made_x000D_
of lightweight core sandwiched between two thin skins having high tensile stiffness. Such design leads to light_x000D_
structures with exceptional flexural properties. However, the lightness of the panels facilitate the propagation_x000D_
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 construction_x000D_
parameters such as thickness, density of the core and/or the skin. Moreover a good scientific understanding of_x000D_
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 composite_x000D_
sandwich panels. The main purpose is to investigate and understand the relationship between the physical_x000D_
parameters of the panels and the sound transmission loss (STL). Thus, a range of parameters known to improve_x000D_
acoustic properties such as the core shear modulus and the density of the core will be used as inputs to the_x000D_
model. Experimental data collected from a previous Engage project will be used to validate the model. Such a_x000D_
combined approach will provide Comtek with valuable design tool to develop custom made floor panels with_x000D_
enhanced acoustic properties for the aeronautic industry., agreement title english : Acoustic Design Tool for Structural Sandwich Panels, agreement title french : Acoustic Design Tool for Structural Sandwich Panels, agreement number : EGP2, agreement value : 12500.0, agreement start date : 2017-06-14, agreement end date : nan, description english : nan, description french : nan, expected results english : nan, expected results french : nan, additional information english : Grant or Award spanning more than one fiscal year. (2017-2018 to 2018-2019), additional information french : Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier. (2017-2018 à 2018-2019), owner organization : nserc-crsng, owner organization title : Natural Sciences and Engineering Research Council of Canada | Conseil de recherches en sciences naturelles et en génie du Canada