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A VIBROACOUSTIC MODEL FOR HIGH FREQUENCY ANALYSIS

✍ Scribed by A. Le Bot

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 444 KB
Volume: 211
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1997.1378

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✦ Synopsis

A simplified model is presented for medium and high frequencies in structures or acoustics. This model, which does not take into account interferences between propagative waves, is asymptotic in the sense that it is more accurate as frequency increases. Based on energetic quantities and energy balance, the spirit of Statistical Energy Analysis (SEA) is conserved. But, unlike SEA which involves global variables, this model considers local variables. The description is more precise and, in particular, the repartition of energy density inside each sub-system is predicted. Numerical simulations are presented, which indicate that the results of this model are a good frequency average of the exact response and are close to those of the ray tracing technique.

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