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International Journal of Automotive Technology

, Volume 20, Issue 5, pp 1043–1050 | Cite as

Road Noise Reduction of a Sport Utility Vehicle via Panel Shape and Damper Optimization on the Floor Using Genetic Algorithm

  • Ji Woo YooEmail author
  • Francesca Ronzio
  • Theophane Courtois
Article
  • 16 Downloads

Abstract

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 

Nomenclature

c

speed of sound, m/s

k

wavenumber, rad/m

p

sound pressure, pascal

t

thickness, m

v

velocity, m/s

A

area, m2

D

distance (= performance − target)

E

young’s modulus, N/m2

F

force, N

N

number of peaks

S

sum of distance; area of panel, m2

W

radiated power, watt

λ

flexural wavelength, m

μ

area density, kg/m2

ω

angular frequency, rad/s

ν

poisson’s ratio

ρ

density of air, kg/m3

σ

acoustic radiation efficiency

Subscript

i

peak id; transfer path id

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Notes

Acknowledgement

The author is grateful to Autoneum CAE team who developed and modified the optimization software especially for this project.

References

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Copyright information

© KSAE 2019

Authors and Affiliations

  • Ji Woo Yoo
    • 1
    Email author
  • Francesca Ronzio
    • 2
  • Theophane Courtois
    • 2
  1. 1.NV CAE Team, Hyundai Motor R&DGyeonggiKorea
  2. 2.Products and Systems Simulation Team, Autoneum HoldingWinterthurSwitzerland

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