An Efficient Modeling Approach for Mid-frequency Trim Effects General Motors LLC

Format:

Conference/Event

Author/Creator:

Wang, Wang, author.

Contributor:

Oh, Sejoong

Schneider, Kurt

Zhang, Qijun

Conference Name:

SAE 2011 Noise and Vibration Conference and Exhibition (2011-05-16 : Grand Rapids, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

In traditional FE based structure-borne noise analysis, interior trims are normally modeled as lump masses in the FE structure model and acoustic specific impedance of the trim is assigned to the FE acoustics model when necessary. This simplification has proven to be effective and sufficient for low frequency analysis. However, as the frequency goes into the mid-frequency range, the elastic behavior of the trim may impose some effects on the structural and acoustic responses. The approach described in this paper is based on the structural FE and acoustic SEA coupling analysis developed by ESI, aiming to improve the modeling efficiency for a possible quick turnaround in virtual assessments. The idea is to reassemble the FE-SEA hybrid analysis results for the trimmed condition by combining radiated sound power from untrimmed body structure with trim component absorption, insertion loss data and other necessary information which can be extracted easily and quickly from an untrimmed FE model, and/or SEA model

Notes:

Vendor supplied data

Publisher Number:

2011-01-1719

Access Restriction:

Restricted for use by site license