Factors Determining the Size and Norms for Securing Barrier Wagon Groups
https://doi.org/10.30932/1992-3252-2019-17-242-257
Abstract
Currently, barrier wagon groups are used on the sorting tracks of railway stations as means to prevent rolling stock from moving beyond their useful length to the opposite side from the hump yard. The reasons to use barrier wagon groups are explained by some factors that are present at most Russian railway marshalling stations and comprise elements of longitudinal profile with accelerating grade on the tracks of hump yards, significant length of sets of uncoupled wagons, unfavorable weather and climatic conditions.
Following use of the empirical method for determining the size of barrier wagon groups and cases of traffic safety violation it was necessary to develop a scientifically sound method for determining the need for formation of barrier wagon groups.
The objective of the study is to identify patterns and factors affecting the decision-making on formation of a barrier wagon group on a particular classification track (classification-departure track), as well as on the size and securing of the barrier wagon groups. The research used methods of statistical analysis and mathematical modelling.
The results of the research were reflected in regulatory instruments of the JSC Russian Railways, particularly in the Procedure to determine the size of barrier wagon groups to be placed on the free tracks of classification yards before train disassembling and to calculate the norms for securing barrier wagon groups [1].
The article provides an analysis of the current technology for formation of barrier wagon groups on the tracks of classification and classification & departure yards, as well as the definition of the term of barrier wagon group. A phased model is proposed for determining the need for formation of barrier wagon groups on free classification tracks before train disassembling, as well as of calculation of the size and norms for securing barrier wagon groups. Calculation criteria are established considering the holding capacity of a barrier wagon group and the mass of rolling wagons. Examples of calculations for specific
marshalling stations are given (using examples of JSC Russian Railway).
The main factors influencing the size and norms for securing barrier wagon groups were determined. The dependences of the maximum allowable speed of leaving yard brake position on the average axial load of the wagons in the absence of wind and with a fair wind, as well as of the norms for securing barrier wagon group on the maximum mass of the classified set of wagons and grade rate.
A scientifically based calculation of the required size of the barrier wagon group and the norms of its securing with stop-blocks (brake shoes) will allow to increase traffic safety by preventing the exit of rolling stock outside the track useful length.
Following use of the empirical method for determining the size of barrier wagon groups and cases of traffic safety violation it was necessary to develop a scientifically sound method for determining the need for formation of barrier wagon groups.
The objective of the study is to identify patterns and factors affecting the decision-making on formation of a barrier wagon group on a particular classification track (classification-departure track), as well as on the size and securing of the barrier wagon groups. The research used methods of statistical analysis and mathematical modelling.
The results of the research were reflected in regulatory instruments of the JSC Russian Railways, particularly in the Procedure to determine the size of barrier wagon groups to be placed on the free tracks of classification yards before train disassembling and to calculate the norms for securing barrier wagon groups [1].
The article provides an analysis of the current technology for formation of barrier wagon groups on the tracks of classification and classification & departure yards, as well as the definition of the term of barrier wagon group. A phased model is proposed for determining the need for formation of barrier wagon groups on free classification tracks before train disassembling, as well as of calculation of the size and norms for securing barrier wagon groups. Calculation criteria are established considering the holding capacity of a barrier wagon group and the mass of rolling wagons. Examples of calculations for specific
marshalling stations are given (using examples of JSC Russian Railway).
The main factors influencing the size and norms for securing barrier wagon groups were determined. The dependences of the maximum allowable speed of leaving yard brake position on the average axial load of the wagons in the absence of wind and with a fair wind, as well as of the norms for securing barrier wagon group on the maximum mass of the classified set of wagons and grade rate.
A scientifically based calculation of the required size of the barrier wagon group and the norms of its securing with stop-blocks (brake shoes) will allow to increase traffic safety by preventing the exit of rolling stock outside the track useful length.
About the Authors
N. A. Kovalenko
Russian University of Transport
Russian Federation
Russian Federation
Ph.D. (Eng), Associate Professor of the Department of Operational Work and Transport Safety Management
Moscow
A. A. Borodin
Russian University of Transport
Russian Federation
Russian Federation
student
Moscow
K. A. Tarasov
JSC Russian Railways
Russian Federation
Russian Federation
Head of the Technological Service of Central Directorate of Traffic Management, a branch
Moscow
References
1. Procedure to determine the size of barrier wagon groups to be placed on the free tracks of classification yards before train disassembling and to calculate the norms for securing barrier wagon groups, approved by regulation of JSC Russian Railways of February 2, 2018 No. 102r.
2. Rules and design guidelines for 1520 mm gauge sorting devices approved by the Deputy Minister of Railways of the Russian Federation 10.10.2003 [Pravila i normy proektirovaniya sortirovochnykh ustroistv kolei 1520 mm, utverzhdennie zamestitelem Ministra putei soobshcheniya Rossiiskoi Federatsii 10.10.2003].
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12. Kovalenko, N. A., Borodin, A. A., Efimov, R. A. Development of methods for calculating the size of barrier wagon groups of wagons for installation before disassembling on free tracks of sorting yards and norms for securing them [Razrabotka metodov racheta velichiny «bariernykh grupp» vagonov dlya ustanovki pered rospuskom na svobodnykh putyakh sortirovochnykh yardov i norm ikh zakrepleniya]. Proceedings of 18th All-Russian Scientific and Practical Conference «Train traffic safety», 2017, VIII-9.
13. Kovalenko, N. A., Borodin, A. A. Application of new calculation criteria when defining need to form barrier wagon groups [Primenenie novyh kriteriev raschyota pri opredelenii neobkhodimosti formirovaniya bariernykh grup]. Zheleznodorozhny transport, 2019, Iss. 9, pp. 15–17.
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For citations:
Kovalenko N.A., Borodin A.A., Tarasov K.A. Factors Determining the Size and Norms for Securing Barrier Wagon Groups. World of Transport and Transportation. 2019;17(6):242-257. https://doi.org/10.30932/1992-3252-2019-17-242-257
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