Keywords: wheel-rail rolling noise, normal monolithic bed track, steel spring floating slab track, longitudinal sleeper track.

In this paper, the finite element models of normal monolithic bed track (NMBT), steel spring floating slab track (SSFST) and longitudinal sleeper track (LST) are established. The dynamic characteristics of the three rail structures are studied by analysing and comparing the rail admittance characteristics and track slab admittance characteristics, and the accuracy of the models is verified combined with the dynamic test results of track structures. Then, in order to analyse and compare the sound radiation characteristics of different tracks, the corresponding models are established based on the boundary element method. Finally, for the purpose of calculating the wheel-rail rolling noise corresponding to different tracks, a wheel-rail interaction model was developed to analyse the corresponding wheel-rail forces per unit roughness. Meanwhile, wheel-rail roughness tests were carried out to find out the wheel-rail rolling noise of different tracks under actual roughness, and the reasonableness of the model was verified with the actual test results. The results show that, compared to NMBT, the laying of both SSFST and LST will increase wheel-rail rolling noise. Below 80Hz, the wheel-rail rolling noise of SSFST is the largest; while above 80Hz, the LST has the highest noise.

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