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Importance of Vehicle Body Elements and Rear Axle Elements for Describing Road Booming Noise

Herrmann, Michael; Jöst, Rainer; Kehl, Florian; Özkan, Ali; Pless, Simon; Gauterin, Frank

Abstract (englisch):
For investigating influences of vehicle components on the acoustic comfort at low frequencies, e.g., the booming noise behavior of a vehicle, building a whole car simulation model is useful. To reduce the model’s complexity and to save resources in the validation process, we first identify relevant components before building the model. Based on previous studies, we focus on the vehicle’s body and the rear axle. In this paper, we analyze which axle and body elements are crucial for describing road booming noise. For this purpose, we use impact measurements to examine noise transfer functions of the body and a vibro-acoustical modal analysis to identify coupled modes between the body’s structure and the interior cavity. For investigating relevant force paths from the rear axle to the body, we used a chassis test bench. We identify the main transmission paths of road booming noise and highlight which axle and body components have an influence on them. Mainly the rear axle in its upright direction in combination with a rigid body movement of the rear tailgate coupled with the first longitudinal mode of the airborne cavity causes road booming noise. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000127150
Veröffentlicht am 04.12.2020
DOI: 10.3390/vehicles2040034
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2624-8921
KITopen-ID: 1000127150
Erschienen in Vehicles
Verlag MDPI
Band 2
Heft 4
Seiten 589–602
Vorab online veröffentlicht am 25.11.2020
Schlagwörter acoustic; vehicle; road; booming; noise; nvh; body; rear axle
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