PhD Research by Zhen Yang
Rolf Dollevoet, Zili Li
02/01/2012 - ongoing
Noise and Vibration
finite element model, impact noise, insulated joint,
China Scholarship Council, TU Delft
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Due to the significant discontinuity in stiffness and geometry, the insulated rail joint (IRJ) is considered as one of the weakest parts in the track structure. The wheel-rail impact over a joint may lead to track deterioration and impact noise. The wheel-rail impact load is believed closely associated to the dynamic behaviour of the track and conditions of track components at the joint section. The dynamic behaviour of a typical IRJ in the Dutch railway network is firstly investigated experimentally by hammer tests and pass-by measurements in this research. After that, a three dimensional finite element IRJ model and a wheel-IRJ interaction model are set up and an explicit time integration scheme is employed to reproduce the hammer test and pass-by measurement numerically. Some track parameters used in the model are calibrated by the hammer tests results. The dynamic behaviour of the IRJ predicted by the numeric models are validated against the field meausurements.