Two Theoretical Models for Wave Propagation in Rails,
TECHNISCHE UNIV BERLIN (GERMANY F R) INST FUER TECHNISCHE AKUSTIK
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As trains get faster and louder there is an increasing interest in all mechanisms participating in noise generation by rail traffic. One of the main acoustic sources seems to be the rail. The intention of this paper is to give a basic survey on wave propagation, in rails under idealized conditions, which means particularly without sleepers and without any surrounding medium. As the complete three-dimensional description was considered to be too voluminous, two simpler models were developed, which are two-dimensional and supplement each other. The three-layers-model describes the shape of the cross section. The cross-section-model covers modes with propagation and displacements within the cross-sectional area. Moreover the first nine types of waves were determined experimentally on a 1.7m long piece of rail of type UIC 6o.