Abstract
This paper verifies the expressions for power input and subsystem energy by modal density of subsystem in Statistical Energy Analysis (SEA) by means of FEM calculation. First, it is shown that the SEA main parameters which include power input, energy of the subsystem and coupling loss factor can be expressed mainly by the modal density. In order to verify their modal density descriptions, FEM calculations are performed to compute subsystem energies, power input and coupling loss factors on four kinds of structures with different non-uniform shapes with the equivalent modal densities. The analytical SEA predictions are also compared with the FEM calculation results.
