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A SEA-LIKE APPROACH FOR THE DERIVATION OF ENERGY FLOW COEFFICIENTS WITH A FINITE ELEMENT MODEL

✍ Scribed by C.R. Fredö

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
482 KB
Volume
199
Category
Article
ISSN
0022-460X

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✦ Synopsis

The Finite Element method is combined with a Statistical Energy Analysis-like (SEAL) energy flow balance to derive the power transmission between two thin plates. A fundamental difference between SEA and the SEAL procedure is that the former is applied to ensembles, while the latter addresses the individual case. Energy Flow Coefficients (EFCs) are derived and explicit use of the non-resonant part of the kinetic energy is made. It is demonstrated that the EFC, as opposed to the SEA Coupling Loss Factor (CLF), can become negative at some frequencies. The EFC exhibits characteristics that are individual for each case examined, although it tends towards the CLF at high frequencies. It is also shown that the SEAL energy flow balance can be used for narrow bands, and at any frequency.

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