TY - JOUR A1 - Auersch, Lutz T1 - Static and dynamic behaviours of isolated and unisolated ballast tracks using a fast wavenumber domain method T2 - Archive of Applied Mechanics N2 - The dynamics of un-isolated and isolated ballast tracks have been analysed by multi-beam models for the track and by a layered half-space model for the soil. The solution is calculated in frequency-wavenumber domain and transformed back to space domain by a wavenumber integral. This is a faster method compared to other detailed track-soil interaction methods and almost as fast as the widely used Winkler-soil method, especially if the compliances of the soil have been stored for repeated use. Frequency-dependent compliances and force transfer functions have been calculated for a variety of track and soil parameters. The ballast has a clear influence on the high-frequency behaviour whereas the soil is dominating the low-frequency behaviour of the track. A layering of the soil may cause a moderate track-soil resonance whereas more pronounced vehicle-track resonances occur with elastic track elements like rail pads, sleeper pads and ballast mats. Above these resonant frequencies, a reduction of the excitation forces follows as a consequence. The track deformation along the track has been analysed for the most interesting track systems. The track deformation is strongly influenced by the resonances due to layering or elastic elements. The attenuation of amplitudes and the velocity of the track-soil waves change considerably around the resonant frequencies. The track deformation due to complete trains have been calculated for different continuous and Winkler soils and compared with the measurement of a train passage showing a good agreement for the continuous soil and clear deviations for the Winkler soil model. PB - Springer CY - Berlin, Heidelberg KW - Railway track KW - Multi-beam model KW - Layered soil KW - Wavenumber method KW - Track deformation KW - Force transfer KW - Track-soil and vehicle-track resonances PY - 2017 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/39080 AN - OPUS4-39080 SN - 0939-1533 SN - 1432-0681 VL - 87 IS - 3 SP - 555 EP - 574 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany