Current version of UIC Leaflet 421 provides a (not mandatory) methodology based on statistical analysis to accept train compositions whose limits exceeds 2500t and 700m in braking position “G”, for international traffic. This methodology does not consider explicitly trains with distributed traction/braking and their most relevant degraded modes. The paper shows a more general methodology to build statistically virtual trains, considering limits in terms of both train mass and length. These virtual trains can be computed efficiently and accurately by means of UIC software TrainDy. The paper also shows main enhancements of this software, and their corresponding experimental validation, to simulate wagons with Composite Brake Blocks (type LL and K). Results section reports the TrainDy computations of in-train forces for trains having up to four Traction Units (TU) communicating by means of GSM-R radio technology. In-train forces for 1500m train, heterogeneously loaded, carrying up to 4800t, with four TU, are like those of already running trains, at least in nominal mode, i.e. when there is a proper communication between the TU.

Cantone, L., Durand, T., Karbstein, R., Ottati, A. (2019). Application of new UIC Leaflet 421 methodology to new freight train compositions with up to four traction units in distributed traction/braking. In Proceedings of World Congress on Railway Research 2019 - WCRR 2019. Tokyo : UIC.

Application of new UIC Leaflet 421 methodology to new freight train compositions with up to four traction units in distributed traction/braking

Cantone L.
;
2019-10-28

Abstract

Current version of UIC Leaflet 421 provides a (not mandatory) methodology based on statistical analysis to accept train compositions whose limits exceeds 2500t and 700m in braking position “G”, for international traffic. This methodology does not consider explicitly trains with distributed traction/braking and their most relevant degraded modes. The paper shows a more general methodology to build statistically virtual trains, considering limits in terms of both train mass and length. These virtual trains can be computed efficiently and accurately by means of UIC software TrainDy. The paper also shows main enhancements of this software, and their corresponding experimental validation, to simulate wagons with Composite Brake Blocks (type LL and K). Results section reports the TrainDy computations of in-train forces for trains having up to four Traction Units (TU) communicating by means of GSM-R radio technology. In-train forces for 1500m train, heterogeneously loaded, carrying up to 4800t, with four TU, are like those of already running trains, at least in nominal mode, i.e. when there is a proper communication between the TU.
WCRR 2019 Tokyo
Tokyo
2019
UIC
Rilevanza internazionale
contributo
29-ott-2019
28-ott-2019
Settore ING-IND/14 - PROGETTAZIONE MECCANICA E COSTRUZIONE DI MACCHINE
English
UIC Leaflet 421, LongT, Freight trains, GSM-R, Longitudinal Train Dynamics
Intervento a convegno
Cantone, L., Durand, T., Karbstein, R., Ottati, A. (2019). Application of new UIC Leaflet 421 methodology to new freight train compositions with up to four traction units in distributed traction/braking. In Proceedings of World Congress on Railway Research 2019 - WCRR 2019. Tokyo : UIC.
Cantone, L; Durand, T; Karbstein, R; Ottati, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/237858
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