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Material Property Identification of Damper Constrained by Thin Foil and Its Application to an Automotive Vehicle

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Abstract

Damper is frequently used to suppress panel vibration and related vehicle interior noise. Unlike an unconstrained damper, a method to find material properties of a constrained damper is more complicated. This study presents a verified method for obtaining material properties of a constrained asymmetrical damper. The most important material parameters of this constrained damper are shear modulus, shear factor, and of course damping loss factor. The paper provides newly corrected equations to give proper numerical values of these parameters. The difference of natural frequencies between the test and the simulation using the estimated values is about 2 %, which shows that the estimation method is correctly presented. Important characteristics such as shear motion and wavelength of a composite beam constrained by a damper are also investigated. Finally, vibration response of a vehicle roof with a constrained damper is measured and is compared to the simulation. It is noticed that the correlation is much improved, comparing with the simulation based on old material properties.

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Abbreviations

g :

shear parameter

k :

wavenumber, rad/m

E :

Young’s modulus, Pascal

G :

shear modulus, Pascal

H :

thickness, mm

I :

area moment of inertia

L :

length of beam, mm

η :

damping loss factor

ω :

angular frequency, rad/s

ρ :

density, kg/m3

1, 2, 3:

layer id

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Authors and Affiliations

  1. R&D Division, Hyundai Motor Company, 150 Hyundaiyeonguso-ro, Namynag-eup, Hwaseong-si, Gyeonggi, 18280, Korea

    Ji Woo Yoo, Seong Hoon Seo, Jong Ho Park & Ji Un Lee

Authors
  1. Ji Woo Yoo
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  2. Seong Hoon Seo
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  3. Jong Ho Park
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  4. Ji Un Lee
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Correspondence to Ji Woo Yoo.

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Yoo, J.W., Seo, S.H., Park, J.H. et al. Material Property Identification of Damper Constrained by Thin Foil and Its Application to an Automotive Vehicle. Int.J Automot. Technol. 22, 863–869 (2021). https://doi.org/10.1007/s12239-021-0078-3

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  • DOI: https://doi.org/10.1007/s12239-021-0078-3

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