Are the Energy Analysis (EA) and the Statistical Energy Analysis (SEA) Compatible

摘要

Originally the statistical energy analysis (SEA) was restricted to a low coupling loss factor, at least, lower than the loss factor of the (adjunct) dynamic system to which the externally driven (master) dynamic system was coupled. The coupling loss factor of reference is that from the adjunct dynamic system to the master dynamic system. With the advent of structural fuzzies, as introduced by Soize and subsequently interpreted by a number of researchers, questions relating not only to the validity of the conservation of energy arose, but also arose were questions relating to the coupling loss factors, to the loss factors and to the external input powers. In trying to decipher, in terms of (SEA), some of these questions, a number of surprising answers emerged which casts doubts on the universal validity of (SEA). In small part this report attempts to warn the noise control engineers that as valuable as (SEA) is, it has fundamental limitations and that these limitations are not merely and strictly a question of frequency regions; i.e., high-, mid- and low-frequencies.