Weight Reduction of Damping Materials on Vehicle Body Panels by using an Optimization with Sound Pressure Constraints

2012-01-0220

04/16/2012

Event
SAE 2012 World Congress & Exhibition
Authors Abstract
Content
This paper presents an optimization method of damping material attached on vehicle body panels incorporated with trimmed body calculation up to 400 Hz. Damping sheets are modeled by using shell elements whose neutral plane are located away from the middle plane of the elements. In this method the offset value must agree with the average of the thicknesses of a panel and a damping sheet attached on it. Therefore, we implement the function that can automatically change the offset values according to the change of the thicknesses of damping sheets during the iterative calculations of optimization. Interior sound pressure levels are employed as the constraint conditions by utilizing the precise acoustic cavity models that have been recently developed. The developed optimization technique is applied to reduce the weight of the damping sheets on the floor panels of a sedan car. The levels of noise transfer functions that are proved to have high contributions to the performance of road noise are constrained in several one-third octave bands. The optimization calculation finds a solution that can achieve 1.5 kg weight reduction after several iterations. Moreover, the vehicle realized the optimal configuration proves to attain the almost the same road noise level as one with the original configuration
Meta TagsDetails
DOI
https://doi.org/10.4271/2012-01-0220
Pages
7
Citation
Yamamoto, T., Maruyama, S., and Shimada, H., "Weight Reduction of Damping Materials on Vehicle Body Panels by using an Optimization with Sound Pressure Constraints," SAE Technical Paper 2012-01-0220, 2012, https://doi.org/10.4271/2012-01-0220.
Additional Details
Publisher
Published
Apr 16, 2012
Product Code
2012-01-0220
Content Type
Technical Paper
Language
English