Applicability of experimental statistical energy analysis to an engine structure

Abstract

The subdivision of an engine structure in Statistical Energy Analysis (SEA) was first discussed using an indicator (initial slope ratio) for estimating coupling strength between subsystems. Secondly, the modal density of each subsystem was measured in a fully assembled condition. Finally, some experimental estimation methods for SEA parameters were tested in order to establish a useful method for making experimental SEA models of engine structure. As a result, the use of equivalent or true mass and the decay method leads to a good model over the 630 Hz or 1.6 kHz band.