Statistical Energy Analysis SEA: A Correlation Between Virtual and Experimental Results
Statistical Energy Analysis (SEA) is a method for analyzing the transmission of sound and vibrations through structural systems. In SEA, a system is represented as a series of subsystems coupled together and a series of linear equations are able to describe the input, absorption, transmission and dissipation of energy through each subsystem. The parameters in the SEA equations are obtained making a statistical hypothesis on the dynamic properties of the subsystems. These hypotheses strongly simplify the analysis and make it possible to analyze systems that are too complex to be analyzed using deterministic methods such as the finite elements. Experimental studies prove the particular accuracy of the SEA method if it is applied at high frequencies (>400 Hz).
In this paper, the statistical energy analysis method is applied to study vibroacoustic problems. In particular, the accuracy and time efficiency of the method have been evaluated. The strengths and the limits of this type of analysis are pointed out and discussed.
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