Modeling of Railway Track Sections on Approaches to Constructive Works and Selection of Track Parameters for Its Normal Functioning

Loktev, Alexey; Korolev, Vadim; Shishkina, Irina; Chernova, Lidia; Geluh, Pavel; Savin, Alexander; Loktev, Daniil

doi:10.1007/978-3-030-19756-8_30

Cited by 28 publications

(6 citation statements)

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“…This indicates that the development of cracks is a consequence of the repeated loads applied, that is, it has a fatigue-like character. Another important indicator is the conditional probabilities of the appearance of at least one crack at any point in the cross section at a given depth [17,18,19,20]. To determine them, we consider the cross section of the core of the crosspiece and a metal layer of unit thickness located at the i-th depth from the surface of the core.…”

Section: Research Technique and Resultsmentioning

confidence: 99%

Hardening features for high manganese steel cores of crosspieces along the way

Shishkina

2020

E3S Web Conf.

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Herein are established main regularities of steel hardening and defect formation for the working conditions of cross-pieces along the way in order to be able to further reduce the number of samples without losing informativity about the metal functioning of cross-piece. The change in the hardness of the metal along the depth of the cross section at the stage of steady wear occurs with the wear rate of the cross-piece. From the surface of the cross into the depths of the cross section, the hardness of the metal decreases. The rule of change can be considered linear. The generalized results of studies of susceptibility of cross-pieces metal for defects showed that the processes of contact defect occurrence and their expansion on the cross-pieces are fatigue-like.

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Section: Research Technique and Resultsmentioning

confidence: 99%

Hardening features for high manganese steel cores of crosspieces along the way

Shishkina

2020

E3S Web Conf.

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“…Table 3. The magnitude of the "impact effect" when the wheels run over the counter rail for switches of the type P65, with different run-out of the counter rails of the SP special profile The practice of designing of cross-shaped switches used in the USSR, and then in Russia, the magnitude of the "impact effect" when wheels hit the counter rail elements is limited to W = (0.4-0.6) m / s, at nominal sizes [12]. With dimensions corresponding to the maximum adverse combinations, this value is W = 0.8 m / s. The adjustment of the gutters with gaskets on the counter rail joints with counter rails of the SP special profile is similar to the formation of such conditions, therefore the value limiting the maximum value of the "impact effect" should be considered as W = 0.8 m / s.…”

Section: Methodsmentioning

confidence: 99%

Switch operation safety

et al. 2019

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The article studied the safety of passing the rolling stock by railway switches. On railway switches, counter rails provide the safe passage of the rolling stock by the wheelsets through the harmful space of the cross. The levels of dynamic effects arising from the passage of carriages by the railway switch significantly depend on the relative position of the wheelsets and elements of the switch, which is determined by the combination of their main geometric dimensions. To calculate the most unfavorable combinations of wheelset and gauge dimensions, taking into account the tolerances adopted for these dimensions, the method of probability compositions is used, based on the application of the theory of probability. The calculating apparatus of the approach using conditional probabilities of events based on the formulas of total probability and Bayes formula. The level of impact of the wheels on the counter-rail is regulated by rationing the values of the “impact effect” on the bent and catching parts of the counter-rail.

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“…In the problem under consideration, the stress distribution in the contact region does not depend on the elastic characteristics of the elements material. Therefore, establishing a correspondence between the model and full-size reduces to establishing a geometric similarity between them [17,18].…”

Section: Research Techniquementioning

confidence: 99%