Effect of dynamic stiffness of fasteners on vibration and acoustic radiation of a ballastless track

A new model for a single wheel rolling over metro ballastless track is developed. It used to carry out the analysis on effect of dynamic characteristics fastener vibration and noise radiation in vertical direction, under excitation wheel/rail uneven surfaces detail. In this analysis, rail modeled as Timoshenko beam resting discrete rubber booted short sleepers, sleepers are connected with slab through linear springs damping units, by using FE method, characterized Poynting-Thomson which takes into account that stiffness dumping fasteners vary frequency their service. The include variation its frequency. considers increases while decreases. acoustic wheel/track is, varying degree, affected property fastener. sleeper greatly But total level not so large because dominant whole analyzed system. These conclusions have certain reference values study reduction measures coupled system fastening characteristic.