Study of the Wheel–Rail System of Open-Pit Locomotives in Traction Mode

Gerasimova, A. A.; Keropyan, A. M.; Girya, A. M.

doi:10.3103/s1052618818010065

Cited by 22 publications

(6 citation statements)

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“…The simulation of interaction between a wheel and a rail is a complex system problem because this system is hierarchical and has a wide range of properties that dynamically change over time [43][44][45].…”

Section: Discussion Of the Results Of Fatigue Stress Distribution Simulation For Worn Wheel Contact Elementsmentioning

confidence: 99%

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

et al. 2021

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The relevance of this study lies in the need to research the wear process of the elements of dynamic systems and to establish the dependence of the geometric and structural characteristics of wheels restored by plasma surfacing with a coating of 15Cr17Ni12V3F on dynamic, cyclically varying loads. The study was aimed to establish the dependencies between the deviation of the wear area, the formation of contact and fatigue stresses, and the change in the phase structure of the wheel defect. It is important to justify the permissible limits of wear of the transverse profile in the contact zone of a wheel and ridge. The object of the study was the dynamic interaction of the “wheel–ridge–rail contact surface” system. To achieve the goal, the following methodology was adopted: kinematic analysis, strength calculation, the use of mathematical analysis in dynamic system modelling, virtual modelling in the SOLIDWORKS software environment of the GearTrax application, experiment planning, and model correction through the results of metallographic studies. The results of the study are presented as reasonable prediction criteria that consider contact cycles during the formation of fatigue stresses at the stage of defect origin. The process of the dynamic interaction of the contact worn profile of a wheel with a railway rail is explored. Polynomial equations are proposed to substantiate the optimal design and technological parameters of designing a railway carriage wheel. The permissible limits of wear of the transverse profile in the contact zone of the wheel and the ridge are justified while taking the coefficient of the reduction of contact stresses in the metal into account. The dependences of the change in static load on the utilization factor of the railway carriage load capacity are established. The dependences of changes in fatigue stresses on the design deviation of the contact area of wheel wear are established. It is confirmed that the stress concentration under cyclic loads is formed in the ferritic layers of the material structure before the appearance of wear.

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Section: Discussion Of the Results Of Fatigue Stress Distribution Simulation For Worn Wheel Contact Elementsmentioning

confidence: 99%

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

et al. 2021

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“…Based on the conducted studies, it is possible to obtain a mathematical dependence of the change in the adhesion coefficient of the bandages of locomotives with the rails during the starting. For example, for a traction aggregate of the alternating current OPE 1 (for 0 <V <40 km / h) [8,9,10,11,12] 7 0.21 53 3…”

Section: The Results Of the Research And Their Discussionmentioning

confidence: 99%

Investigation of the process of controlled starting of the open-pit locomotive for ensuring the maximum adhesion coefficient at the starting

Keropyan¹,

Babichev²,

Sizin³

2018

MATEC Web Conf.

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In order to control the calculated coefficient of adhesion of the locomotive bandages with the rail, a controlled starting of the career locomotive is suggested, in which the relative traction coefficient varies over the time according to the exponential dependence. To realize a rational starting process the tractive effort during the ¼ of the starting period should be ¾ of the maximum which is recommended by the traction conditions for a given section of the track, and for the remaining time, i.e. in the interval of the subsequent three-fourths of the starting time, the tractive effort must be smoothly brought to the required level, acceleration during the same period must also be changed (decreased) and at the end of the starting process, when the train reaches the working speed at this track section, it must be made equal to zero. It is proposed a relationship for determining of the starting time of the locomotive, depending on the initial parameters and actual operating conditions, which makes it possible to develop technical requirements for the automatic launch system of a open pit locomotive, which ensure the implementation of the maximum possible values of adhesion coefficients closed to optimal after the starting process.

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“…At the present stage of the development of innovative technologies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], it is necessary to conduct research aimed at improving the reliability of technological equipment [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Improvement of settlement and analytical and design solutions.…”

Section: Introductionmentioning

confidence: 99%

Static analysis and strength calculation of drive shaft of large-scale cone crusher

et al. 2020

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The paper analyzes the causes of failures of coarse crushers “KKD 1500-180” at JSC “Almalyk MMC”. It has been established that the most common cause of these failures is a drive shaft failure. Static analysis of the strength of the drive shaft was performed using Autodesk Inventor 2020 CAD software. A dangerous shaft section was found, and recommendations aimed at improving its operability were proposed.

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Study of the Wheel–Rail System of Open-Pit Locomotives in Traction Mode

Cited by 22 publications

References 1 publication

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

Study of Wear and Redistribution Dynamic Forces of Wheel Pairs Restored by a Wear-Resistant Coating 15Cr17Ni12V3F

Investigation of the process of controlled starting of the open-pit locomotive for ensuring the maximum adhesion coefficient at the starting

Static analysis and strength calculation of drive shaft of large-scale cone crusher

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