Nowadays, crosswind stability is a key topic for the homologation of railway vehicles and thus it is a pivotal boundary condition in their design process. In most countries, the safety proof is based on the numerical multibody simulation of the driving behaviour of the vehicle assuming a worst case wind scenario. The conservativeness of this approach is aggravated by the uncertainties in the parameters of the simulation models. In this work, some possible improvement of the safety proof are discussed mainly concerning the computational model of the vehicle. An alternative approach based on reliability techniques is then presented and discussed, leading to a more efficient assessment of the risk, and thus to a reduction of the safety factors. The analysis of the crosswind stability of railway vehicles can be extended and made more efficient and accurate by dedicated computational model and enhanced analysis techniques. Simpler vehicle models than the conventional full multibody ones allow the computational effort to be reduced and possibly stochastic wind scenarios instead of deterministic ideal gusts to be used. In this respect, automatic linearisation of the multibody model seems to be practicable and convenient. A dramatic increase m the accuracy and plausibility of the risk assessment can be reached by the introduction of reliability techniques. Such techniques allow the consideration of the well known but still poorly documented uncertainties in the aerodynamic models. The computational effort is increased but as the risk analysis has to be performed only once in the life of a vehicle, this can be accepted.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Efficient models and techniques for the computational analysis of railway vehicles in crosswinds


    Beteiligte:


    Erscheinungsdatum :

    2008


    Format / Umfang :

    10 Seiten, 6 Bilder, 25 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Efficient models and techniques for the computational analysis of railway vehicles in crosswinds

    Carrarini,A. / Deutsche Forsch.Anst.f.Luft- und Raumfahrt,DLR,Wessling,DE | Kraftfahrwesen | 2008



    Assessment of overturning risk of railway vehicles in crosswinds

    Yao, Zhiyong / Deng, Shengjie / Li, Xiaoda | SPIE | 2022


    Assessment of overturning risk of railway vehicles in crosswinds

    Yao, Zhiyong / Deng, Shengjie / Li, Xiaoda | British Library Conference Proceedings | 2022


    Study on the Safety of Operating High-Speed Railway Vehicles Subjected to Crosswinds

    Xiao, Xin-biao / Ling, Liang / Xiong, Jia-yang et al. | Springer Verlag | 2017