Vibro-Acoustic Simulation of Side Windows and Windshield Excited by Realistic CFD Turbulent Flows Including Car Cavity PSA Peugeot Citroen

Format:

Conference/Event

Author/Creator:

Van Herpe, Van Herpe, author.

Contributor:

D'Udekem, Diego

Jacqmot, Jonathan

Kouzaiha, Rami

Conference Name:

7th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference (2012-06-13 : Graz, Austria)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Nowadays, the interior vehicle noise due to the exterioraerodynamic field is an emerging topic in the acoustic design of acar. In particular, the turbulent aerodynamic pressure generated bythe air flow encountering the windshield and the side windowsrepresents an important interior noise source.As a consequence PSA Peugeot Citroën is interested in thenumerical prediction of this aerodynamic noise generated by the carwindows with the final objective of improving the products designand reducing this noise. In the past, several joint studies havebeen led by PSA and Free Field Technologies on this topic. In thosestudies an efficient methodology to predict the noise transmissionthrough the side window has been set up. It relies on a two stepsapproach: the first step involves the computation of the exteriorturbulent field using an unsteady CFD solver (in this case EXAPowerFlow). The second step consists in the computation of thevibro-acoustic transmission through the side window using thefinite element vibroacoustic solver Actran.The present paper extends this methodology for the handling ofmultiple windows, id est, the two front side windows and thewindshield. The complete car cavity is modeled as well. First, acomplete description of the method and the finite element model isprovided, from the boundary conditions to the different componentsinvolved, like the windows, the seals and the car cavity. The totalwind noise level results and the relative contributions of thedifferent windows are then presented and compared to measurementsfor a real car model. The influence of the flow yaw angle (0°versus 10° orientation) is also assessed

Notes:

Vendor supplied data

Publisher Number:

2012-01-1521

Access Restriction:

Restricted for use by site license