As the requirements for reduced vibration of URT viaduct lines continue to increase, low-stiffness structures have been used extensively. When the TSI are adversely affected by low-stiffness structures, the TGI maintenance workload increases sharply. Therefore, it is necessary to predict and evaluate the TDGS of low-stiffness URT viaduct to resolve the conflict between vibration-reduction design and track maintenance. First, the train–steel spring floating slab track-U-beam viaduct model is established. Second, virtual track inspection method is used to obtain the virtual dynamic irregularities. After comparing with actual measurement results, we investigated the influence of linetype, bridge span, and static irregularities on the security indexes and the TDGS. The results showed that for curved viaduct, in addition to vertical dynamic irregularities, alignment/horizontal dynamic irregularities also have characteristic wavelengths at 1/n times bridge span. The time-domain peak values were larger than those of the straight viaduct. Moreover, as the bridge span increased, the TDGS degradation of the curve viaduct was more significant than straight viaduct. The vehicle security indexes of the low-stiffness viaduct lines have large safety margin, while TDGS indexes are close or even exceed the limit when structures are improperly designed. This could bring insurmountable difficulties to the track maintenance.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Track dynamic geometry state prediction for straight/curved low-stiffness urban rail transit viaduct lines based on virtual track inspection method


    Beteiligte:
    Cheng, Fang (Autor:in) / Wei, Kai (Autor:in) / Zhao, Zeming (Autor:in) / Ding, Wenhao (Autor:in) / Wang, Ping (Autor:in)

    Erschienen in:

    Vehicle System Dynamics ; 60 , 12 ; 4245-4268


    Erscheinungsdatum :

    2022-12-02


    Format / Umfang :

    24 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt






    Track measurement algorithms for urban rail transit systems

    Mengert, P.H. / Neat, G.W. | Tema Archiv | 1975


    Urban Rail Transit Track Area Extraction Using LiDAR

    Tuo, Shen / Jinhuang, Zhou / Yuanxiang, Xie et al. | Springer Verlag | 2024


    Coupling Dynamic Analysis of Floating Slab Track in the Urban Rail Transit

    Huang, K. / Bai, H.B. / Li, D.W. et al. | British Library Conference Proceedings | 2013