Sound package for a magnesium alloy dash panel

Authors

  • Aljosa Rakic Dept. of Mechanical Engineering, Université de Sherbrooke, 2500 Boul. Université, QC J1K 3R1, Canada
  • Raymond Panneton Dept. of Mechanical Engineering, Université de Sherbrooke, 2500 Boul. Université, QC J1K 3R1, Canada
  • Noureddine Atalla Dept. of Mechanical Engineering, Université de Sherbrooke, 2500 Boul. Université, QC J1K 3R1, Canada

Keywords:

Acoustic wave absorption, Magnesium alloys, Sound insulating materials, 3D models, Automobile companies, Car cabins, Damping material, Low frequency, Low mass, Sound absorption, Sound transmission loss, Statistical energy analysis, Steel parts, Transmission loss, Volkswagen, Weight ratios

Abstract

The automobile companies such as Ford and Volkswagen decided to use magnesium alloy to replace some steel parts of the car. The magnesium alloy has several advantages over steel. It is more malleable, more ductile, lighter, and it has a higher stiffness weight ratio. However, its low mass gives a poor sound transmission loss performance compared to steel. A 3D model of a car has been designed in the statistical energy analysis (SEA) software VA ONE to calculate the average sound absorption of the car cabin. This model takes into account the sound absorption of seats, roof, floor and doors. The first concept is composed of absorbers and insulators materials. A similar structure was used for the second concept. Only a small damping material layer was added to improve the transmission loss at low frequencies. The optimization was performed on 33 different materials considering the following criteria.

Published

2011-09-01

How to Cite

1.
Rakic A, Panneton R, Atalla N. Sound package for a magnesium alloy dash panel. Canadian Acoustics [Internet]. 2011Sep.1 [cited 2021Apr.17];39(3):14-5. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2387

Issue

Section

Proceedings of the Acoustics Week in Canada

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