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Random uncertainties modelling for vibroacoustic frequency response functions of cars

Abstract : This paper deals with the numerical prediction of the vibroacoustic frequency response functions of cars. In such a complex vibroacoustic system, the role played by data errors and model errors is important and does not have the same consequences for stiff structural element or for flexible (soft) structural element. A non-parametric probabilistic model of random uncertainties is introduced to study the sensitivity of these vibroacoustic frequency response functions. The method is applied to a simplified car body with an internal acoustic cavity. The confidence region of each random vibroacoustic frequency response function is numerically constructed. The results obtained, clearly show an important difference between the level of uncertainties for stiff and flexible structural elements.
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Submitted on : Sunday, April 8, 2012 - 2:23:04 PM
Last modification on : Wednesday, February 26, 2020 - 7:06:08 PM
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J.-F. Durand, L. Gagliardini, Christian Soize. Random uncertainties modelling for vibroacoustic frequency response functions of cars. International Conference on Modal Analysis, Noise and Vibration Engineering, Katholieke Univ Leuven, Dept Mech Engn, Sep 2004, Leuven, Belgium. pp.Pages: 3255-3266. ⟨hal-00686191⟩

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