A model reduction strategy for computing the forced response of elastic waveguides using the wave finite element method

A model reduction strategy is proposed within the framework of the wave finite element method for computing the low- and mid-frequency forced response of single and coupled straight elastic waveguides. For any waveguide, a norm-wise error analysis is proposed for efficiently reducing the size of the wave basis involved in the description of the dynamic behavior. The strategy is validated through the following test cases: single and coupled beam-like structures with thick cross-sections, plates and sandwich structures. The relevance of the model reduction strategy for saving large CPU times is highlighted, considering the computation of the acoustic radiation of plates and Monte Carlo simulations of coupled waveguides.