Determination of SEA coupling loss factors using Finite Element Method

Abstract eng:
Statistical Energy Analysis (SEA) is suitable method for analysis of sound and vibration in high-frequency range, but to build a reliable SEA model is necessary correctly determine individual SEA parameters. Especially for subsystems with complex geometry and material may be desirable to use experimental or numerical methods to identify their parameters. In this paper is Finite Element Method (FEM) in combination with Power injection method (PIM) used for evaluation of coupling loss factors. Methodology is illustrated on several examples of connected plates and beams. Statistical and sensitivity analysis of this methodology is also presented.

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