The present paper reviews the vibro-acoustic\nmodelling of extruded aluminium train floor structures\nincluding the state-of-the-art of its industrial applications, as\nwell as the most recent developments on mid-frequency modelling\ntechniques in general. With the common purpose to\npredict mid-frequency vibro-acoustic responses of stiffened\npanel structures to an acceptable accuracy at a reasonable\ncomputational cost, relevant techniques are mainly based on\none of the following three types of mid-frequency vibroacoustic\nmodelling principles: (1) enhanced deterministic\nmethods, (2) enhanced statistical methods, and (3) hybrid\ndeterministic/statistical methods. It is shown that, although\nrecent developments have led to a significant step forward in\nindustrial applicability, mature and adequate prediction techniques,\nhowever, are still very much required for solving sound\ntransmission through, and radiation from, extruded aluminium\npanels used on high-speed trains. Due to their great potentials\nfor predicting mid-frequency vibro-acoustics of stiffened panel\nstructures, two of recently developed mid-frequency modelling\napproaches, i.e. the so-called hybrid finite element-statistical\nenergy analysis (FE-SEA) and hybrid wave-based method statistical\nenergy analysis (WBM-SEA), are then recapitulated.
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