Dynamics of 2 and 4-Axle Railway Vehicles in Transition Curves above Critical Velocity

Investigation into nonlinear phenomena for various railway vehicles in transition curves at velocities close to critical one

Nonlinear Dynamics ◽

10.1007/s11071-019-05041-2 ◽

2019 ◽

Vol 98 (3) ◽

pp. 1555-1601 ◽

Cited By ~ 3

Author(s):

Krzysztof Zboinski ◽

Milena Golofit-Stawinska

Keyword(s):

Critical Velocity ◽

Systematic Variation ◽

Transition Curve ◽

Railway Vehicle ◽

Nonlinear Phenomena ◽

Nonlinear Behaviour ◽

Railway Vehicles ◽

System Parameters ◽

Simulation Results ◽

Transition Curves

Abstract In this paper recent simulation results aimed at studying nonlinear phenomena that accompany motion of railway vehicle in transition curve at velocities around the vehicle critical velocity are presented by the authors. Such results concern six different objects representing railway vehicles. These are: three 2-axle railway bogies, two 2-axle railway cars, and 4-axle railway car. The paper attention is devoted to presenting as many different nonlinear behaviours of the studied objects as possible. This is done first of all to give an idea to the readers of great number of the nonlinear behaviour types that can appear for railway vehicles in transition curves at velocities lower and bigger than vehicle critical velocity. The differences arising from specificity of particular objects are highlighted while systematic variation of the system parameters in order to study influence of such variation on differences in the behaviour is less represented. The paper ends with the comprehensive comments by the authors to the results obtained.

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Critical velocity measurements of freight railway vehicles roll-over in wind tunnel tests as the method to assess their safety at strong cross winds

Journal of Wind Engineering and Industrial Aerodynamics ◽

10.1016/j.jweia.2021.104559 ◽

2021 ◽

Vol 211 ◽

pp. 104559

Author(s):

Agnieszka Kocoń ◽

Andrzej Flaga

Keyword(s):

Wind Tunnel ◽

Critical Velocity ◽

Velocity Measurements ◽

Wind Tunnel Tests ◽

Railway Vehicles

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Influence of the Longitudinal and Lateral Suspension Damping on the Vibration Behaviour in the Railway Vehicles

Archive of Mechanical Engineering ◽

10.1515/meceng-2015-0008 ◽

2015 ◽

Vol 62 (1) ◽

pp. 115-140 ◽

Cited By ~ 8

Author(s):

Mădălina Dumitriu

Keyword(s):

Numerical Simulations ◽

Linear Model ◽

Critical Velocity ◽

Dynamic Behaviour ◽

Response Frequency ◽

Railway Vehicles ◽

Basic Properties ◽

Lateral Vibrations ◽

Random Behaviour ◽

Frequency Functions

Abstract The paper focuses on the influence of the longitudinal and lateral suspension damping in correlation with the velocity upon the vibration behaviour of the railway vehicles while moving on a tangent track. The numerical simulations are developed based on a linear model of a 17-degree of freedom vehicle that allows the evaluation of the dynamic behaviour of the vehicle in a sub-critical velocity. Based on the response frequency functions of the vehicle in a harmonic and in a random behaviour, a series of basic properties of the stable behaviour of the forced lateral vibrations has been made evident, as well as the opportunities to lower the level of the carbody vibrations by changing the suspension damping.

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