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Role of Dynamic Stiffness in Effective Isolation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 05, 2019 by SAE International in United States
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In any machinery, avoiding noise and vibration completely is a difficult task due to the structural dynamic behaviors of components. To safeguard the operator, it is important to best isolate the operator station from NVH environment. Cabin isolation is an important aspect to minimize structure borne noise and tactile vibrations to be transferred into the cabin. Isolators are selected based on the isolation system inertial properties at mounting locations in the operating frequency range interested. The most important assumption to select isolators are that the active side and passive side of the isolators are nearly rigid so impedance mismatch is created for effective isolation.
This paper describes the importance of dynamic stiffness of the structures on both the active and passive side for better NVH performance. NVH performance of passive side is evaluated analytically and computationally in terms of tactile vibrations and structure borne noise for various ratios of the dynamic stiffness over isolator stiffness. The isolator selection criterion is also discussed based on rigid body modes, operating frequency range, transmissibility ratio, and kinematic energy distributions.
CitationDasabai, B. and Yang, Y., "Role of Dynamic Stiffness in Effective Isolation," SAE Technical Paper 2019-01-1495, 2019, https://doi.org/10.4271/2019-01-1495.
- Singiresu, S.R., Mechanical Vibrations, Fourth Edition. ISBN:978-81-775-8874-3.
- Smollen, E.L., “Generalized Matrix Method for the Design and Analysis of Vibration Isolation Systems,” Edgerton, Germeshausen and Grier, Inc., Bedford, MA, 1964, 12.3i, 12.7, received July 13, 1964, revised February 1, 1966
- Duncan, A., Geotchius, G., and Guan, J., “SAE 2013 NVH Conference Structure-Borne NVH Workshop,” in 2013 SAE Noise and Vibration Conference and Exhibition.
- Zhen, J. and Fredrickson, S., “The Effect of Mounting Structure Stiffness on Mounting System Isolation Performance on Off-Highway Machines,” SAE Technical Paper 2015-01-2350, 2015, doi:10.4271/2015-01-2350.