Vibro-acoustic FEA Modeling of Two Layer Trim Systems DaimlerChrysler AG

Format:

Conference/Event

Author/Creator:

Glandier, Christian Y., author.

Conference Name:

SAE 2005 Noise and Vibration Conference and Exhibition (2005-05-16 : Grand Traverse, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

This paper investigates the potential of using FEA poro-elastic Biot elements for the modeling carpet-like trim systems in a simplified setup. A comparison between FEA computations and experiments is presented for two layer (mass-spring) trim systems placed on a test-rig consisting in a 5103541.6 mm flat steel plate clamped in a stiff frame excited at its base. Results are presented for a given heavy layer with two different poro-elastic materials: one foam and one fibrous material. The investigations included accelerometer measurements on the steel plate, laser-doppler vibrometer scans of the heavy layer surface, sound pressure measurements in free field at a distance of 1 meter above the plate, as well as sound pressure in a closed rectangular concrete-walled cavity (0.50.60.7 m) put on top of the test-rig. Computations were carried out using a commercial FEA software implementing the Biot theory for poro-elastic media. Experiments and simulations are in good agreement both qualitatively and quantitatively up to 1 kHz

Notes:

Vendor supplied data

Publisher Number:

2005-01-2325

Access Restriction:

Restricted for use by site license