Suchergebnisse

"This is an Accepted Manuscript of an article published by Taylor & Francis inVehicle System Dynamics on APR 3 2019, available online: https://www.tandfonline.com/doi/full/10.1080/00423114.2018.1473617." ; [EN] The simulation of the pantograph-catenary dynamic interaction is at present mainly based on deterministic approaches. However, any errors made during the catenary stringing process are sources of variability that can affect the dynamic performance of the system. In this paper, we analyse the influence of dropper length, dropper spacing and support height errors on the current collection quality by applying a classic Monte Carlo method to obtain the probability density functions of several output quantities. The effects of installation errors are also studied for a range of train speeds. Finally, the pre-sag that, on average, produces the best behaviour of the system is identified, allowing for the uncertainty in the catenary installation. The results obtained show the convenience to consider variability in pantograph-catenary dynamic simulations. ; The authors would like to acknowledge the financial support received from the FPU program offered by the Spanish Ministry of Education, Culture and Sports (Ministerio de Educacion, Cultura y Deportes) [grant number FPU13/04191]. The funding provided by the Regional Government of Valencia (Generalitat Valenciana) [PROMETEO/2016/007] and the Spanish Ministry of Economy, Industry and Competitiveness (Ministerio de Economia, Industria y Competitividad) [TRA2017-84736-R] is also acknowledged. ; Gregori Verdú, S.; Tur Valiente, M.; Tarancón Caro, JE.; Fuenmayor Fernández, F. (2019). Stochastic Monte Carlo simulations of the pantograph-catenary dynamic interaction to allow for uncertainties introduced during catenary installation. Vehicle System Dynamics. 57(4):471-492. https://doi.org/10.1080/00423114.2018.1473617 ; S ; 471 ; 492 ; 57 ; 4 ; Bruni, S., Ambrosio, J., Carnicero, A., Cho, Y. H., Finner, L., Ikeda, M., … Zhang, W. (2014). The results of the ...

[EN] The computational cost required to simulate the pantograph-catenary dynamic interaction can be a limiting factor in certain applications. Specifically, for Hardware-in-the-Loop (HIL) simulations, real-time capabilities of the software are imperative. In this paper, we propose to combine a modal coordinate approach with an offline/online strategy to build a very efficient simulation strategy. The proposed approach preserves the accuracy of the results, compared with those obtained by classical finite element strategies. We also define and validate a criterion for a priori truncation of the modal basis and analyse the effect of explicit treatment of the interaction force. The results show that the method presented could be used in pantograph HIL tests. ; The authors would like to acknowledge the funding provided by the Regional Government of Valencia (PROMETEO/2016/007) and the Spanish Ministry of Economy, Industry and Competitiveness (TRA2017-84736-R). ; Gregori Verdú, S.; Tur Valiente, M.; Pedrosa Sanchez, AM.; Tarancón Caro, JE.; Fuenmayor Fernández, F. (2019). A modal coordinate catenary model for the real-time simulations of the pantograph-catenary dynamic interaction. Finite Elements in Analysis and Design. 162:1-12. https://doi.org/10.1016/j.finel.2019.05.001 ; S ; 1 ; 12 ; 162