Experimental and finite element investigation of statistical energy analysis parameters for idealized subsystems

Abstract

In the field of acoustic and vibration analysis, statistical energy analysis proven to be an efficient tool for evaluation of the crucial parameters like damping loss factor (DLF), modal density and coupling loss factor of complex structures. In the present study, modal densities and DLFs of idealised subsystems i.e. rectangular plates comprised of different materials were evaluated experimentally and numerically. In addition, the effects of various boundary conditions (BCs) like free-free, simply supported and cantilever on the statistical energy parameters have been studied. The results obtained using both experimental and numerical approaches are in close agreement. In the case of comparison of all the considered materials, the highest modal density was observed for aluminium, whereas the lowest frequency was observed for graphene doped epoxy composite. The highest DLF was observed for GFR epoxy composite, whereas the lowest DLF was observed for stainless steel.