Virtual SEA: Mid-Frequency Structure-Borne Noise Modeling Based on Finite Element Analysis

The virtual SEA is similar to experimental SEA, but based on Frequency Response Functions computed using a FE model of the studied structure. The knowledge of the internal loss factors (defined by the user) as well as numerous observation and excitation points leads to a consistent data set that may be used to properly identify a SEA model. This process has been improved by developing an original automatic sub-structuring technique which guarantees an optimized model construction and consequently a robust identification. This last feature allows a lower expertise level of SEA users.

Virtual SEA has been applied to the floor of a minivan. Convincing results are obtained when compared to experiment.