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Controlling Panel Noise and Vibration Using Non-Contacting Test Methodologies
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English
Abstract
Non-contacting test methodology studies of automotive body components have become a very useful, high resolution and sensitive test technique to engineering personnel. Continuous wave laser holometry, computer aided holometry (CAH), pulsed laser holometry and a scanning laser system were used to image vibration patterns. These methods were selected because of improved data turn-around time in the test development process while having no mass-loading effects on the sheet metal panels.
An analysis of the vehicle body structure was conducted to improve the interior body structure sound quality and to reduce road noise presence. An interrogation of the interior noise spectrum identified critical frequencies affecting vehicle NVH. This paper addresses the results of using the aforementioned non-contacting test methods to reduce panel responses by developing an optimum rib section and pattern, and the addition of adhered stiffening materials.
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Citation
Snyder, D. and Marchi, M., "Controlling Panel Noise and Vibration Using Non-Contacting Test Methodologies," SAE Technical Paper 931339, 1993, https://doi.org/10.4271/931339.Also In
References
- Marchi M, M. Snyder D. S. “Current Automotive Holometry Studies” SPIE Proc 1162 293 308 1989
- Brown G. M. Cummins D. L. Marchi M. M. Wales R. R. “Holometric Testing Applications for Vehicle Component Structural Improvements” SPIE Proc 1026 152 164 1988