Tech Papers

[30] Windnoise: Coupling Flow Data to Full Vehicle Vibro-Acoustic Models

Why is it of big interest to predict the interior noise of a car? The air-flow noise (wind noise), perceived in the interior of a car is significantly affected by the acoustic transparency of major “walls” of the greenhouse. (e.g. side windows, windshield, doors, …), the design and quality of the sealing systems and the shape of various exterior components and parts (e.g. A-pillar, mirror, …) which strongly influences the vehicle air-flow and therefore the aero-acoustic excitation. To get answers to typical questions in the early design phase of car development, in particular: how much of expensive and weighty acoustic secondary measures are necessary to get a low and harmonic interior-noise and can these measures – partly – be replaced by a specific “good” design of the car exterior?

2011 – ESI 4th European Vibro-Acoustic Users Conference (VAUC). Stuttgart, Germany
Jörg Ocker (Dr. Ing. h.c. F. Porsche AG, Germany)
Denis Blanchet (ESI Group, Germany)

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