| ROAD NOISE REDUCTION OF A SPORT UTILITY VEHICLE
VIA PANEL SHAPE AND DAMPER OPTIMIZATION ON THE FLOOR
USING GENETIC ALGORITHM |
Ji Woo Yoo1
, Francesca Ronzio2, Theophane Courtois2 |
1Hyundai Motor Company
2Autoneum Holding |
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| ABSTRACT |
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Road noise is always a major concern in automotive industries. The contribution of the floor of a automotive
vehicle to road noise is large because of its large area and close location to chassis in terms of structure-borne noise. Therefore,
the panel shape and damper of the floor should be carefully designed, which are effective on medium frequency region of the
road noise. Because there are so many design options on the floor panels that experience high modal density and short
wavelength at medium frequencies, traditional mode-decoupling approaches are no longer efficient. This study shows that a
proposed optimization process based on a finite element model and a genetic algorithm is successful to reduce road noise at
medium frequencies. Some background theories about the genetic algorithm and acoustic radiation efficiency in the frame of
vibro-acoustics are explained to understand the optimization process. Vehicle performance evaluation and experimental study
are given to validate this study. Finally, this verified process is applied to a sport utility vehicle (SUV) under development,
whose road noise reduction is shown to be successful. |
| Key Words:
Automotive, Optimization, Genetic algorithm, Road noise, Structure-borne noise, Panel shape, Damper,
Medium frequency, TPA, Radiation efficiency, SUV |
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Corresponding Author.
Ji Woo Yoo , Email. 
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