A new approach has been developed to determine the dynamic amplification factors of railways. This approach employs a traditional multi-body dynamic model of vehicle–track interaction and a 3D explicit finite element model of wheel–rail rolling contact to treat the low- and high-frequency dynamics, respectively. Excitations are considered by contact surface unevenness and more specifically, by the power spectrum density of track irregularity for the low-frequency analysis and by the critical wheel flat, weld, and rail corrugation for the high frequency. For the 40-tonne axle load heavy haul railway simulated in this work, it has been found that the optimum fastening stiffness should be 150–200 MN/m; the dynamic amplification factors of the wheel–rail contact, fastening, and ballast forces are 1.94, 2.0, and 1.67, respectively, if the fastening stiffness of 200 MN/m is applied. Finally, new dynamic amplification factor formulae that include key parameters such as the fastening stiffness, speed, and axle load are proposed for the heavy haul railway design.


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    Titel :

    Determination of dynamic amplification factors for heavy haul railways


    Beteiligte:
    Zhao, Xin (Autor:in) / Yang, Jizhong (Autor:in) / An, Boyang (Autor:in) / Liu, Chao (Autor:in) / Cao, Yabo (Autor:in) / Wen, Zefeng (Autor:in) / Jin, Xuesong (Autor:in)


    Erscheinungsdatum :

    2018-02-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






    Heavy haul railways conference : proceedings

    The Institution of Engineers, Australia | TIBKAT | 1979


    Heavy Haul Transport on Chinese Railways

    Fu, Z. | British Library Conference Proceedings


    Rail Defects of Heavy Haul Railways

    Wan, F. / Sun, G. / Huang, S. et al. | British Library Conference Proceedings