0 5 10 15 20 25 30 10−7 10−6 10−5 10−4 10−3 10−2 10−1 Mode number Δ f/f Relative frequency error comparison Unc basis tsCb 1 Iteration 2 Iteration Fig. 4 Scheme section 3.2, 1 iteration vs. 2 iterations 0 5 10 15 20 25 30 10−8 10−7 10−6 10−5 10−4 10−3 10−2 10−1 Mode number Δ f/f Relative frequency error comparison Unc basis 25F−5I 20F−10I 15F−15I 10F−20I Fig. 5 Scheme section 3.3., integration of IRCA modes with fixed interface modes 5 Conclusion and discussion In this paper, we proposed some computational schemes to extend the standard Craig-Bampton reduction method to coupled vibro-acoustic problems. The main Globally enriched substructuring techniques for vibro-acoustic simulation 277
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