Vehicle Dash Mat SEA Modeling and Correlation General Motors Corporation

Format:

Conference/Event

Author/Creator:

Zhang, Qijun, author.

Conference Name:

SAE 2007 Noise and Vibration Conference and Exhibition (2007-05-15 : St. Charles, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

The dash mat is one of the most important acoustic components in the vehicle for both powertrain noise and road noise attenuation. To optimize acoustic performance and mass requirements in the advanced development stage, analytical modeling is essential. The development of a detailed Statistical Energy Analysis (SEA) model of a dash mat is discussed in this paper. Modeling techniques and correlation with test are presented for two different production dash mat designs, a barrier-decoupler conventional system and a dual layer dissipative system without a mass barrier. The material properties and thickness distribution are used in the SEA model together with the geometry information of the dash panel. With the SEA model suitably correlated, trade-off studies are conducted to investigate the relationship between mass reduction of the barrier and change in decoupler thickness. The effects of air gaps are also considered in both modeling and testing. The SEA model was carefully constructed to interface with full vehicle SEA models as well as simulate Sound Transmission Loss test fixture results. The modeling techniques and process developed in this paper are applicable to many other components in the vehicle, such as the floor, roof, et cetera

Notes:

Vendor supplied data

Publisher Number:

2007-01-2310

Access Restriction:

Restricted for use by site license