Analysis of the coupling loss factor between connected plates using the finite element method

Barbosa, R. M. Graduate Program in Mechanical Engineering, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, rangelmb@yahoo.com.br

Medeiros, E. B. Graduate Program in Mechanical Engineering, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, bauzer@demec.ufmg.br

Abstract

The coupling loss factor (CLF) of statistical energy analysis (SEA) is employed to characterize the power transmission between L-joined Plates. The aim is to compare different approaches for this parameter and identify factors that influence its results. The wave approach is used to obtain the CLF, and the apparent coupling loss factor (ACLF) is obtained by experimental statistical energy analysis (ESEA) together with the finite element method (FEM). In the procedures, the influence of boundary conditions and damping are analyzed, in which it is found that they do not affect the wave approach. In the ESEA/FEM procedure, the boundary conditions influence more significantly at lower frequencies, and for the higher values of damping used the results approximate the wave approach, which in general tends to occur at higher frequencies. The influence of the applied excitation in FEM is also observed in the ESEA/FEM procedure.

Keywords:

coupling factor

statistical energy analysis

L-joined plates

finite element method.

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