Dynamic Stiffness Investigation of an Automotive Body-in-White by Utilizing Response Surface Methodology

Abbasi, M, FARD, M and Khalkhali, A 2018, 'Dynamic Stiffness Investigation of an Automotive Body-in-White by Utilizing Response Surface Methodology', SAE Technical Paper, pp. 1-8.


Document type: Journal Article
Collection: Journal Articles

Title Dynamic Stiffness Investigation of an Automotive Body-in-White by Utilizing Response Surface Methodology
Author(s) Abbasi, M
FARD, M
Khalkhali, A
Year 2018
Journal name SAE Technical Paper
Start page 1
End page 8
Total pages 8
Publisher S A E Inc.
Abstract Noise, vibration, and harshness (NVH) attribute is needed to be included in the vehicle structure design since improving the NVH characteristics enhances the ride quality experienced by the occupants. In this regard, an efficient method was proposed to investigate the structural dynamic response of an automotive body considering low-frequency NVH performances. Moreover, the improvement of an automotive structure under the constraint of NVH behavior was investigated by using the design of experiments (DOEs) method. The DOEs methodology was for screening of the design space and generating approximation models. Here, the thicknesses of panels consisting of a body-in-white (BIW) of an automotive were employed as design variables for optimization, whose objective was to increase the first torsional and bending natural frequencies. Central composite design (CCD) for DOEs sampling and response surface methodology (RSM) were employed to optimize the dynamic stiffness. Moreover, the effects of the selected variables as well as their binary interactions were modeled and the optimum conditions for rigidity improvement were obtained via the RSM. Furthermore, the validity of the proposed optimization scheme was verified through CAE analysis. The results indicated that the first torsion and bending natural frequency were improved compared to the baseline design. Additionally, precise surrogate models in polynomial terms for the first bending and torsion natural frequencies were obtained.
Subject Dynamics, Vibration and Vibration Control
Keyword(s) Modal analysis
NVH
Noise
vibration
and harshness
RSM
Response surface method
BIW
Body-in-white
DOI - identifier 10.4271/2018-01-1479
Copyright notice © 2018 SAE International. All rights reserved.
ISSN 0148-7191
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Created: Wed, 19 Sep 2018, 13:27:00 EST by Catalyst Administrator
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