This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analysis and Optimization of Aerodynamic Noise in Vehicle Based on Acoustic Perturbation Equations and Statistical Energy Analysis
Abstract:
In this article, the method based on the combination of the acoustic perturbation
equations and the statistical energy analysis has been used to simulate and
optimize the interior aerodynamic noise of a large sport utility vehicle model.
The reliability of the method was verified by comparing the analysis results
with the wind tunnel test. Influenced by the main noise sources such as
A-pillar, exterior rearview mirror, and front sidewindow, the wind noise of the
model was significantly greater than that of the same class. To improve the wind
noise performance, the side mirror was optimized with the method, including the
minimum distance between the rearview mirror and the triangle trim cover, the
angle between the rearview mirror and the front sidewindow, and the shell groove
of the rearview mirror. The simulation results show that the overall sound
pressure level in the car decreases by 2.12 dBA and the articulation index
increases by 4.04% after optimization. The development target of wind noise
performance was achieved finally. The research demonstrates that the method
combining the acoustic perturbation equations and the statistical energy
analysis could be effectively utilized in the design optimization of the
exterior shape to improve the wind noise performance of the vehicle during the
conceptual design stage of the vehicle development.