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A platform for research: civil engineering, architecture and urbanism
Influence of the railway vehicle properties in the running safety against crosswinds
Abstract The aim of the present study consists of evaluating the influence of the most relevant geometric, mechanical and aerodynamic vehicle properties in the risk of derailment caused by crosswinds. To achieve this objective, a vehicle-structure interaction model is used to carry out non-linear dynamic analyses to assess the train-track coupling behaviour in the presence of winds. By computing the wheel-rail contact forces, the derailment risk is evaluated based on the unloading criterion, as suggested by the European Norm EN 14067–6 (2016), for several scenarios with different train and wind speeds. The wind is simulated with a stochastic model that allows the generation of turbulent wind time-histories based on power spectral density functions. The reference vehicle adopted in this work corresponds to the European InterCity Express 3 (ICE-3) train, whose original properties were parameterized in order to evaluate their influence in the vehicle's stability. The parametric study focused on several properties of the vehicle, namely the carbody mass, height of the gravity centre, aerodynamic coefficients, and stiffness and damping of the suspensions. Apart from the suspensions' properties, which prove to have a negligible influence in the vehicle's stability, the remaining parameters have a significant impact in the running safety against crosswinds.
Highlights Influence of the train parameters in the overturning derailment risk due to crosswinds. Suspension properties have a negligible influence on the vehicle's stability against lateral winds. Carbody mass stabilizes the train and decreases the risk of derailment. ·Variations of 40% of the carbody mass or aerodynamic coefficients lead to variations up to 30% of the critical wind speeds. The decrease of the aerodynamic coefficients leads to a considerable performance improvement against overturning risk.
Influence of the railway vehicle properties in the running safety against crosswinds
Abstract The aim of the present study consists of evaluating the influence of the most relevant geometric, mechanical and aerodynamic vehicle properties in the risk of derailment caused by crosswinds. To achieve this objective, a vehicle-structure interaction model is used to carry out non-linear dynamic analyses to assess the train-track coupling behaviour in the presence of winds. By computing the wheel-rail contact forces, the derailment risk is evaluated based on the unloading criterion, as suggested by the European Norm EN 14067–6 (2016), for several scenarios with different train and wind speeds. The wind is simulated with a stochastic model that allows the generation of turbulent wind time-histories based on power spectral density functions. The reference vehicle adopted in this work corresponds to the European InterCity Express 3 (ICE-3) train, whose original properties were parameterized in order to evaluate their influence in the vehicle's stability. The parametric study focused on several properties of the vehicle, namely the carbody mass, height of the gravity centre, aerodynamic coefficients, and stiffness and damping of the suspensions. Apart from the suspensions' properties, which prove to have a negligible influence in the vehicle's stability, the remaining parameters have a significant impact in the running safety against crosswinds.
Highlights Influence of the train parameters in the overturning derailment risk due to crosswinds. Suspension properties have a negligible influence on the vehicle's stability against lateral winds. Carbody mass stabilizes the train and decreases the risk of derailment. ·Variations of 40% of the carbody mass or aerodynamic coefficients lead to variations up to 30% of the critical wind speeds. The decrease of the aerodynamic coefficients leads to a considerable performance improvement against overturning risk.
Influence of the railway vehicle properties in the running safety against crosswinds
Heleno, R. (author) / Montenegro, P.A. (author) / Carvalho, H. (author) / Ribeiro, D. (author) / Calcada, R. (author) / Baker, C.J. (author)
2021-07-20
Article (Journal)
Electronic Resource
English
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