Representation of Constrained/Unconstrained Layer Damping Treatments in FEA/SEA Vehicle System Models: A Simplified Approach

Paper #:
  • 1999-01-1680

Published:
  • 1999-05-17
Citation:
Akanda, A. and Goetchius, G., "Representation of Constrained/Unconstrained Layer Damping Treatments in FEA/SEA Vehicle System Models: A Simplified Approach," SAE Technical Paper 1999-01-1680, 1999, https://doi.org/10.4271/1999-01-1680.
Pages:
15
Abstract:
In this study, a simplified approach to modeling the dynamics of damping treatments in FEA (Finite Element)/ SEA (Statistical Energy) models is presented. The basic idea is to represent multi-layered composite structures with an equivalent layer. The properties of the equivalent layer are obtained by using the RKU (Ross, Kerwin and Ungar) method. The procedure presented here does not require any special pre-processing of the finite element input file and it does not increase the number of active degrees of freedom in the model, thereby making it possible to include the effect of these treatments in large system/subsystem level models. The equivalent properties obtained from RKU analysis can also be used in the SEA system models. In this study, both unconstrained and constrained layer damping treatments applied to simple structures (e.g., flat panels) as well as production vehicle components are examined. The predicted forced responses (narrow-band and frequency-space average) are compared with that of the detailed models (viscoelastic solid elements) and test measurements.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2013-04-09
Training / Education
2013-04-09
Technical Paper / Journal Article
2010-09-28
Training / Education
2013-04-09
Training / Education
2013-04-09