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Erschienen in:
2022 | OriginalPaper | Buchkapitel
12. Road Noise: Embedding Suspension Test Benches in Sound & Vibration Design using virtual points and the Transfer Path Analysis Framework
verfasst von : Maarten V. van der Seijs, Julie M. Harvie, David P. Song
Erschienen in: Dynamic Substructures, Volume 4
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Abstract
Many Car Manufacturers (OEMs) use dedicated test bench setups for testing and developing components separately from their vehicle platforms. Relating these results to full-vehicle assemblies is not immediately possible because of the difference in boundary conditions and incompatibility between test bench and vehicle measurement points.
This study focuses on the use of tire noise test benches in the engineering of full-vehicle NVH. We show how virtual points, easily obtained using DIRAC, ensure compatibility between various test assemblies. A total of 10 contact points between the suspension parts and the bodywork is described using 3, 5 or 6 degrees of freedom per point. The TPA framework is extensively used to create and compare source descriptions: direct blocked forces from a rigid test bench, in situ blocked forces from a compliant test bench, and several component TPA approaches on the full vehicle. Blocked forces are estimated both before and after the bushings. Results are evaluated for simulation of road noise at the driver’s ear in the vehicle.