Advanced Simulation Method for Wind Noise Vehicle Design Renault

Format:

Book

Conference/Event

Author/Creator:

Mordillat, Philippe, author.

Contributor:

Errico, Fabrizio

Zerrad, Mehdi

Conference Name:

13th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference (2024-06-19 : Graz, Austria)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2024

Summary:

Summary: With the electrification of powertrains, noise inside vehicles has reached very satisfactory levels of silence. Powertrain noise, which used to dominate on combustion-powered vehicles, is now giving way to other sources of noise: rolling noise and wind noise. These noises are encountered when driving on roads and freeways and generate considerable fatigue on long journeys.Wind noise is the result of turbulent and acoustic pressure fluctuations created within the flow. They are transmitted to the passenger compartment via the vibro-acoustic excitation of vehicle surfaces such as windows, floorboards, and headlining.Because of their mechanical properties, windows are the surfaces that transmit the most noise into the passenger compartment. Even though acoustic pressure is much weaker in amplitude than turbulent pressure fluctuations, it still accounts for most of the noise perceived by occupants. This is because its wavelength is closer to the characteristic wavelengths of glass vibration, making it more efficient at propagating through cabin glazing.Accurate modeling of these phenomena requires the coupling of CFD (Computational Fluid Dynamics) and high-frequency vibro-acoustic simulations. Among other things, CFD simulations must reproduce the creation and propagation of acoustic waves in the airflow around the vehicle; the Lattice-Boltzmann method is used for this purpose. The vibro-acoustic simulations must enable the coupling between the external aero-acoustic loading on the glazing and the propagation of noise in the passenger compartment to the occupants' ears

Notes:

Vendor supplied data

Publisher Number:

2024-01-2938

Access Restriction:

Restricted for use by site license