Estimation of Wheel/Rail Interaction Forces in the Contact Area Due to Roughness

Remington, Paul J.; Webb, J.

doi:10.1006/jsvi.1996.0249

Cited by 54 publications

(41 citation statements)

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“…For now, the problem of reducing the wear rate for the contact «wheel-rail» taking into account all features of contacting wasn't resolved. This problem is resolved in specific cases for a specific contact [5][6][7]. The majority of these researches were conducted taking into account only some contact characteristics with a large number of simplifications.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of rational roughnes of the side surface of the rail top in curved sections of the underground railway track

Voronin

Skoryk

Korostelov

2016

EEJET

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Наведені результати теоретичних та експериментальних досліджень впливу шорсткості поверхонь на трібологічні властивості контакту «колесорейка» в криволінійних ділянках колії метрополі тену. За результатами досліджень вста новлені значення раціональної шорсткос ті контактуючих поверхонь, що послугує передумовою створення технології пре вентивного шліфування рейок для упо вільнення їх зносу при русі в криволінійних ділянках колії метрополітену Ключові слова: контактні напружен ня, модельні зразки, раціональна шор сткість, «колесорейка», колія метро політену Даны результаты теоретических и экс периментальных исследований влияния шероховатости поверхностей на три бологические свойства контакта «колесо рельс» в криволинейных участках пути метрополитена. По результатам исследо ваний установлены значения рациональной шероховатости контактирующих повер хностей, что послужит предпосылкой со здания технологии превентивного шлифо вания рельсов для замедления их износа при движении в криволинейных участках пути метрополитена Ключевые слова: контактные напря жения, модельные образцы, рациональ ная шероховатость, «колесорельс», путь метрополитена UDC 625.143 : 625.4

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of rational roughnes of the side surface of the rail top in curved sections of the underground railway track

Voronin

Skoryk

Korostelov

2016

EEJET

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“…Due [3,4]. Слід зауважити, що це питання може досліджуватися лише для конкретних умов контактування [5][6][7]. При цьому мають ураховуватися особливості матеріалів контактуючих поверхонь, діючі на контакт навантаження, умови контактування і т. п.…”

Section: In This Work the Influence Of Preventive Grinding Rails And unclassified

Improving Resource Performance by Metro Rail Warning Grinding

Voronin¹,

Skoryk²,

Korostelov³

2017

ЗбнаукпрацьУКРДУЗТ

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“…wheel and rail, are made of the same material, which has a modulus of rigidity G and a Poisson's ratio ν . [31].…”

Section: Appendix a Influence Coefficients For The Elastic Halfspacementioning

confidence: 99%

“…From the Hertzian assumptions [31] detailed in Section 3.5.1, the equation of the contact patch is ellipsoidal: Table 4.1 from Section 4.3. MATLAB function surf interpolates the discrete values to make the plotted surface continuous; this function has been used in the above figure.…”

Section: Appendix a Influence Coefficients For The Elastic Halfspacementioning

confidence: 99%

“…Remington and Webb [31] presented their '3D distributed point reacting spring' (3D-DPRS) model introducing a Winkler bedding in the contact patch, including hence both effects mentioned above without adding a correction. This model permitted Thompson [32] to conclude that the analytic correction gives excessive attenuation at short wavelengths and reasonable results for wavelengths smaller than the contact-patch length when compared to the 3D-DPRS model.…”

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Advanced Techniques for Time-Domain Modelling of High-Frequency Train/Track Interaction

Navarro¹

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The aim of the present Thesis is to develop models for the study of very highfrequency phenomena associated with the coupled dynamics of a railway vehicle with the track. Through these models, this Thesis intends to address squeal noise as a particular case of rolling noise when the train negotiates a small radius curve.Wheel/rail interaction is the predominant source of noise emission in railway operations. Rolling contact couples the wheel and the rail through a very small area, characterised by strongly non-linear and non-steady state dynamics that differentiates rolling noise from any other noise problem. Wheel/rail contact problem is studied based on Kalker's variational theory and the local falling behaviour of the coefficient of friction is introduced by means of a regularisation of Coulomb's law. Its implementation shows that the influence of the falling friction on the creep curves can be assumed negligible, thus rolling contact is finally modelled using a constant coefficient of friction.Flexibility is introduced in railway substructures through the Finite Element (FE) method in order to cover the high-frequency range. This work adopts a rotatory wheelset model that takes computational advantage of its rotational symmetry. It also develops a cyclic flexible rail model that fixes the translational contact force in a spatial point of the mesh through a technique called Moving Element (ME) method. A modal approach is used to reduce significantly the number of degrees of freedom of the global problem and a diagonalisation technique permits to decouple the resulting modal equations of motion in order to reduce the computational requirements of the time integrator.Simulations in curving conditions in the time domain are carried out for constant friction conditions in order to study if the proposed interaction model can reproduce squeal characteristics for different curve radii and coefficients of friction.Keywords: train/track dynamic interaction, rotatory wheelset, cyclic track, wheel/rail rolling contact, falling friction, regularisation of Coulomb's law, Moving Element Method, decoupling techniques, curve squeal. iii ResumenEl objetivo de la presente Tesis es desarrollar modelos para el estudio de fenómenos de muy alta frecuencia asociados a la dinámica acoplada de un vehículo ferroviario con la vía. A través de estos modelos, esta Tesis pretende abordar el fenómeno de los chirridos como un caso particular de ruido de rodadura en condiciones de curva cerrada.La interacción rueda/carril es la fuente predominante de ruido en las operaciones ferroviarias. El contacto es el responsable del acoplamiento entre la rueda y el carril a través de un área muy pequeña caracterizada por una dinámica fuertemente no lineal y no estacionaria. El problema de contacto rueda/carril se estudia mediante la teoría variacional de Kalker y la caída local del coeficiente de fricción se introduce por medio de una regularización de la ley de Coulomb, que muestra que su influencia sobre las curvas de fluencia se puede despre...

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Estimation of Wheel/Rail Interaction Forces in the Contact Area Due to Roughness

Cited by 54 publications

References 0 publications

Determination of rational roughnes of the side surface of the rail top in curved sections of the underground railway track

Determination of rational roughnes of the side surface of the rail top in curved sections of the underground railway track

Improving Resource Performance by Metro Rail Warning Grinding

Advanced Techniques for Time-Domain Modelling of High-Frequency Train/Track Interaction

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