Investigation of acoustic transmission beneath a railway vehicle by using statistical energy analysis and an equivalent source model

Abstract An approach is presented for modelling the noise propagation beneath train floor and this applied to rolling sources. It assumed that sound incident on made up of a direct reverberant component. A combination two numerical approaches considered deal with these: an equivalent source model, represent component, statistical energy analysis (SEA) part. In wheel replaced by monopole dipole sources, which its radial axial radiation. The rail vertical vibration sleepers are arrays sources while lateral array dipoles. power obtained using TWINS model. SEA region divided into several volumes input these subsystems be due first reflections from ground. have very similar contributions total although depends how equipment arranged train. verified comparing predicted pressure levels laboratory measurements field tests.