The Anatomy of Railway Vehicle Running Gear

Orlova, Anna; Boronenko, Yuri

doi:10.1201/9780849333217.ch3

Cited by 13 publications

(15 citation statements)

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“…The equations of motion of a two-axle railway bogie system moving on a tangent and perfect track are derived [25] under certain assumptions that reduce the number of degrees of freedom of the complete system. We find that the bifurcation from the stationary attractor is a sub-critical Hopf bifurcation leading to an unstable periodic solution.…”

Section: Discussionmentioning

confidence: 99%

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Symmetric/asymmetric bifurcation behaviours of a bogie system

Gao

Yuan

et al. 2013

Journal of Sound and Vibration

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Section: Discussionmentioning

confidence: 99%

“…It is clear that the contact conditions vary considerably depending on the shape of the wheel and rail profiles [25]. Ideally the contact may take the form of a one-point-contact, a two-point-contact or a multi-point contact.…”

Section: [2]mentioning

confidence: 99%

Symmetric/asymmetric bifurcation behaviours of a bogie system

Gao

Yuan

et al. 2013

Journal of Sound and Vibration

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“…Various publications presenting the results of several dynamic simulations in which the track quality was modified, dealing with safety studies can be found in: (10), (11), (12), (13), (14), (15), (16), (17) and (18); some others dealing with track fatigue studies can be found in: (11), (15), (16), (17), (18), (19), (20) and (21); and some dealing with ride quality studies in: (11), (15), (16), (17), (18), (22), (23), (24), (25) and (26).…”

Section: Introductionmentioning

confidence: 99%

Influence of the track quality and of the properties of the wheel–rail rolling contact on vehicle dynamics

Suarez

Félez

Lozano

et al. 2013

Vehicle System Dynamics

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This work describes an analytical approach to determine what degree of accuracy is required in the definition of the rail vehicle models used for dynamic simulations. This way it would be possible to know in advance how the results of simulations may be altered due to the existence of errors in the creation of rolling stock models, whilst also identifying their critical parameters. This would make it possible to maximize the time available to enhance dynamic analysis and focus efforts on factors that are strictly necessary.In particular, the parameters related both to the track quality and to the rolling contact were considered in this study. With this aim, a sensitivity analysis was performed to assess their influence on the vehicle dynamic behaviour. To do this, 72 dynamic simulations were performed modifying, one at a time, the track quality, the wheel-rail friction coefficient and the equivalent conicity of both new and worn wheels. Three values were assigned to each parameter, and two wear states were considered for each type of wheel, one for new wheels and another one for reprofiled wheels.After processing the results of these simulations, it was concluded that all the parameters considered show very high influence, though the friction coefficient shows the highest influence. Therefore, it is recommended to undertake any future simulation job with measured track geometry and track irregularities, measured wheel profiles and normative values of wheel-rail friction coefficient. This is an electronic version of an article published in Vehicle

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“…The design provides sufficient ride quality (comfort) only for bogies that have low lateral stiffness of secondary suspension [3]; besides, the majority of the carbody mass is directly transmitted to the secondary suspension stage, and the carbody can only rotate in relation to the bogie about a vertical axle. This design is widely used in passenger trains, for example, in the former USSR [2,4].…”

Section: Introductionmentioning

confidence: 99%

“…The bolster-beam is a structural element of the carbody that has two main functions: (i) to provide mechanical stiffness to the loads distribution; and (ii) to allow the connection to the bogie in the secondary suspension stage. To study in depth the second main function, the bolster-beam must, among others: (i) transmit the vertical loads of traction and braking; and (ii) provide longitudinal stability of the bogie frame and a loads distribution over the axle box for the vehicle traction [2].…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of Railways Bolster-Beam Under Commercial Operation Conditions: Over-Traction Andover-Braking

Martinod¹,

Betancur²,

Restrepo³

et al. 2017

Transport Problems

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Summary.The conditions for the operation of railway systems are closely related to the increase of the commercial demand; as a consequence, the performance of the structural elements of railways changes. The present paper focuses on a study of the structural behaviour of bolster-beams under commercial operation conditions of railway systems, specifically in the dynamic conditions generated in events of over-traction and over-braking on the vehicle running. The proposed work is constructed based on the following phases: (i) analysis of the kinematics of the vehicle; (ii) development of numerical models, a model based on the multibody theory, and a Finite Elements model; (iii) development of experimental field tests; and (iv) development of simulations for a detailed analysis of the structural behaviour for a study of the strain distribution in the main bolster-beam. This study is applied to a particular case of a railway system that provides commercial service to passengers. ANÁLISIS DEL ESTRUCTURAL DE LAS TRAVIESAS DE TRENES BAJO CONDICIONES DE OPERACIÓN COMERCIAL: SOBRE-ACELERACIÓN Y SOBRE-FRENADOResumen. Las condiciones de operación de los sistemas ferroviarios se encuentran estrechamente relacionadas con el incremento de la demanda, en consecuencia el comportamiento de los elementos estructurales del tren varían. El presente trabajo se enfoca en el estudio del comportamiento estructural de la traviesa pivote, bajo condiciones de operación comercial de un sistema ferroviario, específicamente en las condiciones dinámicas generadas en los eventos de sobre-aceleración y sobre-frenado del vehículo. El trabajo propuesto se estructura con base en el siguiente conjunto de etapas: (i) estudio de la cinemática del vehículo en marcha; (ii) desarrollo de modelos numéricos uno basado en la teoría multi-cuerpo y otro basado en Elementos Finitos; (iii) desarrollo de pruebas experimentales en campo; y (iv) desarrollo de simulaciones para el análisis detallado del comportamiento estructural para el estudio del flujo de los esfuerzos en la traviesa pivote. El trabajo es aplicado a un caso particular de estudio de un sistema ferroviario que presta servicio comercial de pasajeros.

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The Anatomy of Railway Vehicle Running Gear

Cited by 13 publications

References 0 publications

Symmetric/asymmetric bifurcation behaviours of a bogie system

Symmetric/asymmetric bifurcation behaviours of a bogie system

Influence of the track quality and of the properties of the wheel–rail rolling contact on vehicle dynamics

Structural Analysis of Railways Bolster-Beam Under Commercial Operation Conditions: Over-Traction Andover-Braking

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