Sensitivity Analysis of Noise Control Treatments 2016-01-1848
The problem of noise transmission through a structure into a cavity appears in many practical applications, especially in the automotive, aeronautic and space industries. In the mean time, there is a trend towards an increasing use of composite materials to reduce the weight of the structures. Since these materials usually offer poor sound insulation properties, it is necessary to add noise control treatments. They usually involve poroelastic materials, such as foams or mineral wools, whose behaviour depends on many parameters. Some of these parameters may vary in rather broad ranges, either because of measurement uncertainties or because their values have not been fixed yet in the design process. In order to efficiently design sound protections, performing a sensitivity analysis can be interesting to identify which parameters have the most influence on the relevant vibroacoustic indicators and concentrate the design effort on them. The Fourier Analysis Sensitivity Test (FAST) is used in this work to study the effect of several design parameters on industrially relevant quantities such as transmission loss and noise reduction index. Two configurations are studied : The first one is an academic example of sound transmission through a layered composite plate, calculated with an analytical model based on the transfer matrix method. The second is a Statistical Energy Analysis (SEA) model of an industrial case featuring a higher degree of complexity.
Citation: Christen, J., Ichchou, M., Bareille, O., and Troclet, B., "Sensitivity Analysis of Noise Control Treatments," SAE Technical Paper 2016-01-1848, 2016, https://doi.org/10.4271/2016-01-1848. Download Citation
Author(s):
Jean-Loup Christen, Mohamed Ichchou, Olivier Bareille, Bernard Troclet
Affiliated:
École Centrale de Lyon, Airbus Defence and Space
Pages: 4
Event:
9th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Design processes
Composite materials
Transmissions
Noise
Insulation
Foams
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »