Effect of Viscoelastic Patch Damping on Casing Cover Dynamics

2001-01-1463

04/30/2001

Event
SAE 2001 Noise & Vibration Conference & Exposition
Authors Abstract
Content
Many automotive components and sub-systems require viscoelastic damping treatments to control noise and vibration characteristics. To aid the dynamic design process, new approaches are needed for modeling of partial damping treatments and characterization of the overall dynamic behavior. The analytical component of the design process is illustrated via the transmission casing cover, along with supporting experiments. First, the vibration response of production casing plates is examined, with and without the constrained layer treatment. A modified flat plate is employed along with a generic housing that provides the realistic boundary conditions for subsequent work. A simplified analytical damping model for constrained viscoelastic layer damping is suggested based on assumed modal functions. Using the analytical model, design guidelines in terms of optimal patch shapes and locations are suggested. Natural frequency shifts associated with patch damping treatments are predicted and successfully compared with measured data.
Meta TagsDetails
DOI
https://doi.org/10.4271/2001-01-1463
Pages
11
Citation
Kim, J., and Singh, R., "Effect of Viscoelastic Patch Damping on Casing Cover Dynamics," SAE Technical Paper 2001-01-1463, 2001, https://doi.org/10.4271/2001-01-1463.
Additional Details
Publisher
Published
Apr 30, 2001
Product Code
2001-01-1463
Content Type
Technical Paper
Language
English