To investigate the lateral vibration mechanism of middle cars of Shinkansen train in tunnel section, field tests and numerical simulations are performed. From the analysis of car body vibration and air pressure around the carbody, the following results are obtained. (1) The pressure fluctuation on the wall side of the carbody is correlated with the lateral vibration in tunnel section. (2) The yawing vibration mode tends to become dominant. (3) The dominant frequency increases and the negative damping is added to the original carbody dynamic system as the running speed increases. From these results, it is suggested that the lateral vibration is related to the interaction of the carbody vibration and the gap flow fluctuation between the carbody and the tunnel wall. From a numerical vehicle dynamic simulation including flow fields with moving boundaries, the following results are obtained. (1) The energy from fluid may continues carbody vibration in yawing motion which are observed largely in the field test data. (2) The damping of carbody vibration decreases with the flow field.


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    Titel :

    Lateral vibration of middle cars of Shinkansen train in tunnel section (Analysis of running characteristics of test train due to gap flow induced model)


    Beteiligte:
    Ueki, K. (Autor:in) / Nakade, K. (Autor:in) / Fujimoto, H. (Autor:in)


    Erscheinungsdatum :

    2000


    Format / Umfang :

    13 Seiten, 4 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch