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N&V Component Structural Integration and Mounted Component Durability Implications
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
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Exterior component integration presents competing performance challenges for balanced exterior styling, safety, ‘structural feel’  and durability. Industry standard practices utilize noise and vibration mode maps and source-path-receiver  considerations for component mode frequency placement. This modal frequency placement has an influence on ‘structural feel’ and durability performance. Challenges have increased with additional styling content, geometric overhang from attachment points, component size and mass, and sensor modules. Base excitation at component attachment interfaces are increase due to relative positioning of the suspension and propulsion vehicle source inputs. These components might include headlamps, side mirrors, end gates, bumpers and fascia assemblies. Here, we establish basic expectations for the behavior of these systems, and ultimately consolidate existing rationales that are applied to these systems. We consider a simple two degree-of-freedom system subject to a base excitation consisting of masses attached via springs and dampers. Component mode decoupling, vibration amplification and basic design guidance relationships are suggested.
CitationStebbins, M. and Schudt, J., "N&V Component Structural Integration and Mounted Component Durability Implications," SAE Technical Paper 2020-01-1396, 2020.
- Stebbins, M.A., Cafeo, J., Beltramo, M. , “Customer Perception of Road Induced Structural Feel,” 2020-01-20SS-0577, SAE World Congress, 2020.
- Wang, X. , Vehicle Noise and Vibration Refinement CRC Press, Woodland Publishing Limited, 2010, 258-263.
- Allemang, R.J. , “Vibrations: Experimental Modal Analysis,” UC-SDRL-CN-20-263-662, Structural Dynamics Research Laboratory, University of Cincinnati, Cincinnati, OH, 3:1-2, 1998.
- Miner, M.A. , “Cumulative Damage in Fatigue,” Journal of Applied Mechanics 12:149-164, 1945.