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Small Changes in Vehicle Suspension Layouts Could Reduce Interior Road Noise

Wysocki, Timo von; Chahkar, Jason; Gauterin, Frank

Abstract:
Inside the passenger cabin of modern cars, lower noise levels from quieter engines make road noise more dominant. The main transfer path for road noise below 300 Hz into the car is the suspension. Suspension layouts are mainly determined by driving dynamics, but their influence on road noise is not in focus. Layout design changes for driving dynamics in the early development phase require the modification of structural dynamics Finite Element (FE) models used to predict interior acoustics. This manual modification makes acoustical effects from layout design changes difficult to predict. In the following article, we present a method to adapt suspension FE models automatically to suspension layout changes. This allows an automatic optimization of the suspension layout regarding road noise. As an example, a rear axle suspension layout is modified to decrease road noise between 60 and 90 Hz by moving the connection point between the track rod and the knuckle.

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Verlagsausgabe §
DOI: 10.5445/IR/1000105058
Veröffentlicht am 18.01.2020
Originalveröffentlichung
DOI: 10.3390/vehicles2010002
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2624-8921
KITopen-ID: 1000105058
Erschienen in Vehicles
Band 2
Heft 1
Seiten 18–34
Bemerkung zur Veröffentlichung Artikel ist bereits veröffentlicht
Vorab online veröffentlicht am 10.01.2020
Schlagwörter NVH; suspension; chassis; rear axle; kinematics; road noise; concept phase; model simplification; finite element simulation; python
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