Modeling process and validation of Hybrid FE-SEA method to structure-borne noise paths in a trimmed automotive vehicle

2008-36-0574

03/30/2008

Event
SAE Brasil Noise and Vibration Conference
Authors Abstract
Content
The Finite Element Method (FEM) and the Statistical Energy Analysis (SEA) are standard methods in the automotive industry for the prediction of vibrational and acoustical response of vehicles. However, both methods are not capable of handling the so called “mid frequency problem”, where both short and long wavelength components are present in the same system. A Hybrid method has been recently proposed that rigorously couples SEA and FEM. In this work, the Hybrid FE-SEA method is used to predict interior noise levels in a trimmed full vehicle due to broadband structure-borne excitation from 200Hz to 1000Hz. The process includes the partitioning of the full vehicle into stiff components described with FE and modally dense components described with SEA. It is also demonstrated how detailed local FE models can be used to improve SEA descriptions of car panels and couplings. After review of the Hybrid FE-SEA models of a full vehicle that were built, sample experimental validation results of interior SPL and panel vibration are shown.
Meta TagsDetails
DOI
https://doi.org/10.4271/2008-36-0574
Pages
11
Citation
Charpentier, A., Sreedhar, P., Cordioli, J., and Fukui, K., "Modeling process and validation of Hybrid FE-SEA method to structure-borne noise paths in a trimmed automotive vehicle," SAE Technical Paper 2008-36-0574, 2008, https://doi.org/10.4271/2008-36-0574.
Additional Details
Publisher
Published
Mar 30, 2008
Product Code
2008-36-0574
Content Type
Technical Paper
Language
English