A majority of the traffic related track deterioration cost originates from freight traffic. With heavier and faster freight trains the maintenance cost is likely to increase. The present paper focuses on the possibility to improve ride comfort and reduce track forces on standard freight wagons with link suspension. The variation of characteristics in link suspension running gear is considerable and unfavourable conditions leading to hunting are likely to occur. Supported by on-track tests and multibody dynamic simulations it is concluded that the running behaviour of two-axle wagons with UIC double-link suspension as well as wagons with link suspension bogies (G-type) can be improved when the running gear are equipped with supplementary hydraulic dampers. For the two-axle wagon both yaw-dampers and lateral dampers are needed to achieve satisfactory running behaviour for all wheel-rail contact conditions. On low conicity carbody hunting is the dominant oscillation pattern. To reduce this motion lateral dampers between carbody and wheelset (or bogie) are needed. At high conicity only the wheelset is hunting. Here only wheelset (or bogie) yaw damping efficiently suppresses the oscillations. If the stiffnesses in the primary suspension are too low the possible improvement by adding dampers is limited.


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    Title :

    Improving ride comfort in freight wagons with link suspension running gear using hydraulic dampers


    Additional title:

    Verbesserung des Fahrverhaltens von Güterwagen mit Schakengehänge-Fahrwerken durch Nachrüstung mit hydraulischen Dämpfern


    Contributors:

    Published in:

    ZEVrail Glasers Annalen ; 131 , Sonderheft Tagungsband


    Publication date :

    2007


    Size :

    11 Seiten, 13 Bilder, 2 Tabellen, 20 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Improving ride comfort in freight wagons with link suspension running gear using hydraulic damper

    Jönsson, Per-Ander / Stichel, Sebastian / Andersson, Evert | IuD Bahn | 2007


    How to improve the running behaviour of freight wagons with UIC-link suspension

    Stichel, S. / International Association for Vehicle System Dynamics | British Library Conference Proceedings | 2000