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Vehicle Body Optimization of Structural Noise and Vibration Using a Hybrid Technique
Technical Paper
2007-01-2327
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a comprehensive hybrid technique developed for optimization of damping materials on vehicle bodies. This technique uses finite element analysis (FEA) along with experimental techniques to complement each other. In this particular application, a hybrid technique was used to address floorpan vibration and the resulting radiated noise. The objective of this approach was to develop an optimized damping material application layout. This optimized layout balances the increased performance with the overall material volume, mass, and cost. The optimized damping material application developed resulted in a 3-5 dB reduction in the floorpan vibration level while saving 10% in material volume and mass. This optimized layout was validated on a body-in-white using a laser vibrometer. In addition, a new liquid applied material was also introduced with better damping characteristics. This new material was shown to yield further material mass and volume savings with equal damping performance. This paper documents the step-by-step process and results of the damping pattern and material optimization.
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Authors
Citation
Siavoshani, S., Tudor, J., and Barpanda, D., "Vehicle Body Optimization of Structural Noise and Vibration Using a Hybrid Technique," SAE Technical Paper 2007-01-2327, 2007, https://doi.org/10.4271/2007-01-2327.Also In
References
- Principles of Laser Doppler Vibrometry, Polytec Website
- ASTM E756 Standard “Standard Test Method for Measuring Vibration-Damping Properties of Materials” 2004
- Tudor, J. Kauffmann, K. Raykovitz, M. “Elastic Modulus Measurement of Glass Bonding Adhesives for Finite Element Model Representation” Internal CRI Report 2005004866 2005
- Ross, D. Kerwin. E. Ungar, E. “Damping of Plate Flexural Vibrations by Means of Viscoelastic Laminae” Structural Damping, American Society of Mechanical Engineers 1959