Statistical Energy Analysis (SEA) for energy attenuation factors and coupling loss factors in asymmetric periodic plates

Abstract

This paper presents a Statistical Energy Analysis (SEA) to investigate the energy attenuation factors in asymmetric periodic structures. The experimental results are compared with the predicted results obtained by the SEA method. It is found that the attenuations of the base plate and rib plates were hyperbolic in shape. Analytical formulae for the energy at the respective sub-system are also derived in terms of the internal and coupling loss factors so as to determine these attenuation factors analytically. By identifying the contributing internal and coupling loss factors from the attenuation factors, appropriate treatments can now be implemented into the appropriate sub-system.