An innovative contact partition model for wheel/rail normal contact

Shaojie, Gu; Xia, Yang; Zhou, Shunhua; Lian, Songliang; Zhou, Yu

doi:10.1016/j.wear.2016.07.001

Cited by 9 publications

(5 citation statements)

References 11 publications

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“…. ; 13Þ (16) where C down ðy i Þ and C up y i ð Þ are the profile with maximum wear and CN75 rail profile, respectively.…”

Section: Design Of Rail Grinding Target Profilementioning

confidence: 99%

“…Since the global energy consumption method as shown in formula (17) cannot be directly applied to finite element simulation, Fouvry 16 et al. performed a simple integration of the formula (18), the local energy consumption density formula in any cycle at the characterization node is obtained:where qtrue(xtrue) is the local instantaneous frictional shear stress, dstrue(xtrue) is the amplitude of local instantaneous relative slip.…”

Section: Rail Wear Prediction Of Grinding Target Profilementioning

confidence: 99%

See 1 more Smart Citation

Design method of worn rail grinding profile based on Frechet distance method

Lin

Zou

Yang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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Due to the large volume and high running density of railway freight lines, rail deterioration occur frequently. Thus, it is necessary to grind the rail in time to improve the wheel-rail relationship. The profile data of the worn rail were measured at different measuring points in a section, and the Frechet distance method was adopted to analyze the data. The representative profile reflecting the overall condition of rail wear in this section is obtained. Combined with NURBS curve theory, a fitting algorithm in which the rail profile with certain discrete points was established. Taking the reduction of the amount of grinding material removed as the objective function, setting wheel-rail matching characteristics, and the reduction of rail wear as the constraint conditions, a calculation model for rail grinding profile was established. The dynamic characteristics of standard profile CN75 and g grinding profile OP75 were analyzed by the vehicle track dynamics model. The results showed that compared with the standard profile CN75, the amount of grinding material removed of the grinding profile OP75 is reduced by 44.7%, and the height reduction of the rail top is reduced by 0.39 mm. After [Formula: see text] km of running, the wear amounts of grinding profile OP75 is about 36.1%–36.5% less than that of standard profile CN75.In the small curve section, the derailment coefficient of grinding profile OP75 is reduced by 11.7% compared with that of standard profile CN75. The dynamic performance is improved. The grinding target profile has better dynamic characteristics and is beneficial to reduce wheel-rail wear.

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“…. ; 13Þ (16) where C down ðy i Þ and C up y i ð Þ are the profile with maximum wear and CN75 rail profile, respectively.…”

Section: Design Of Rail Grinding Target Profilementioning

confidence: 99%

Section: Rail Wear Prediction Of Grinding Target Profilementioning

confidence: 99%

Design method of worn rail grinding profile based on Frechet distance method

Lin

Zou

Yang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

show abstract

“…Here the efficiency and reliability of the track design are crucial for a successful operation. A lot of modern rail track studies focus on individual aspects of design and operation, such as fatigue [21,24], ballast failure [9], driving comfort [31], noise or vibration [8,12,13,30].…”

Section: Recent Research Analysismentioning

confidence: 99%

Simulation of Impact Interaction of Rail Transport Carriage in a Butt Roughness Zone

Shpachuk¹,

Chuprynin²,

Daleka³

et al. 2020

SJSUT.ST

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Mechanical and mathematical models of mechanical multidimensional discrete-continuous systems "carriagetrack" in terms of static and impact interaction in a butt roughness zone are proposed. Their interaction is investigated with the example of a four-axle car and a track for four motion phases in the place of isolated butt roughness. Parameters of static and impact interaction of the carriage with a track in a place of butt joint which takes into account operational and constructive factors are defined.

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“…However, it does not consider the contact between the resilient wheel and rail and the impact of the rail joint on the wheel-rail contact. References [10][11][12][13] have used this method in various ways with different software packages in order to obtain the optimized solutions for different wheel-rail interaction problems, especially stress distribution, wear, and crack growth analysis. References [14][15] have used the dynamic explicit finite element method to study the distribution of rail joint stress for the wheel-rail contact on the rail joint.…”

Section: Introductionmentioning

confidence: 99%

Contact Analysis of the Two Dimensional Wheel-Rail Based on Finite Element Method

Tian¹,

Kan²

2018

AJMIE

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Wheel-rail contact mechanics is one of the fundamental areas for studying wheel-rail relationship, therefore, the study of wheel/rail contact is of great significance to solve related problems. In this paper, simplified two dimensional rigid wheel-rail and resilient wheel-rail contact finite element models are established, and the reliability of the established models is verified by comparison of the finite element method and Hertz theory results. In the vicinity of the rail joint, the contact conditions do not satisfy the relevant hypothesis of Hertz theory, so the finite element method is used to investigate the wheel/rail contact analysis in rail joint. The results show that wheel-rail contact pressure, maximum equivalent stress, the plastic deformation areas, and δ x of the rail increases with the distance decreasing of the contact point to the rail joint. By comparing rigid wheel and resilient wheel, we also can find that the contact pressure, the maximun equivalent stress and δ x of the resilient wheel-rail are less than the rigid wheel-rail, and width of contact area is basically same as rigid wheel-rail. Therefore, the use of resilient wheel can reduce the wear between wheel and rail and reduce the collapse of rail joint.

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An innovative contact partition model for wheel/rail normal contact

Cited by 9 publications

References 11 publications

Design method of worn rail grinding profile based on Frechet distance method

Design method of worn rail grinding profile based on Frechet distance method

Simulation of Impact Interaction of Rail Transport Carriage in a Butt Roughness Zone

Contact Analysis of the Two Dimensional Wheel-Rail Based on Finite Element Method

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