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

Format:

Conference/Event

Author/Creator:

Akanda, Anab, author.

Conference Name:

Noise & Vibration Conference & Exposition (1999-05-17 : Traverse City, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1999

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

1999-01-1680

Access Restriction:

Restricted for use by site license