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Structural Borne Noise Control in Passenger Cars and Light Commercial Vehicles (LCV) Utilizing New Light Weight Damping Systems
Technical Paper
2016-01-1312
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Light weighting vehicle acoustic components and improving the performance level of sound abatement treatments is becoming more important to automotive manufacturers due to increased fuel economy requirements established by the Corporate Average Fuel Economy - (CAFE) standards [1], and the consumer’s demand for ever improving sound quality inside the vehicle cabin. In tests conducted by Ricardo Inc. for the Aluminum Association Inc., a 2008 report estimates that for every 45 kg of mass removed from passenger vehicles and light weight commercial vehicles (LCV) up to a 1 percent increase in fuel mileage can be achieved [2]. Automotive OEM’s expect that sound abatement products, sound barriers, absorbers, and damping materials contribute to this reduction in vehicle weight.
Through the use of new light weight technologies with densities between 0.4 gm/cm3 and 0.7 gm/cm3 it is now possible to achieve mass reductions over traditional extensional layer and constrained layer materials by as much as 60% and reductions over liquid applied spray dampers (LASD) of 30% while maintaining, and in some cases improving, the damping level and transmission loss performance of these materials improving the sound quality within the vehicle cabin.
Utilizing established test methodology for measuring the vibration damping properties of materials [3] and for evaluating the transmission loss properties of materials [4], this paper highlights the capabilities of this new light weight technology for reducing mass and for handling structure borne noise versus traditional extensional layer and constrained layer materials.
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Citation
Wood, T., "Structural Borne Noise Control in Passenger Cars and Light Commercial Vehicles (LCV) Utilizing New Light Weight Damping Systems," SAE Technical Paper 2016-01-1312, 2016, https://doi.org/10.4271/2016-01-1312.Also In
References
- Federal Register 77 199 October 15 2012 Rules and Regulations 62627
- Casadei , A. , Broda , R Impact of Vehicle Weight Reduction on the Fuel Economy of Various Vehicle Architectures Ricardo Inc., for the Aluminum Association, Inc. 2008
- ASTM International Standard Test Method for Measuring Vibration-Damping Properties of Materials ASTM Standard E756-05 2010
- SAE International Surface Vehicle Recommended Practice Laboratory Measurement of the Airborne Sound Barrier Performance of Flat Materials and Assemblies SAE Standard J1400 2010
- Renninger , J. Understanding Damping Techniques for Noise and Vibration Control E-A-R Specialty Composites white paper 2001
- Henkel, TEROSON RB 8275 VW-25 Technical Data Sheet October 2013
- SAE International Surface Vehicle Recommended Practice Laboratory Measurement of the Airborne Sound Barrier Performance of Flat Materials and Assemblies SAE Standard J1400 Aug 2010