6ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
MODELING OPERATING COSTS IN SORTING STATION
Dilmurod Bakhodirovich Butunov
PhD, Docent of the Department "Organization of transport movement" Tashkent
State Transport University (Uzbekistan), dilmurodpgups@mail.ru
Alfiya Mirkhatimovna Bashirova
Senior lecturer of the Department "Organization of transport movement", Tashkent
State Transport University (Uzbekistan), alflyabashirova94@gmail .com
ABSTRACT
This article is devoted to the issues of modeling the operating costs associated with the processing of wagons at a sorting station. A description of the model of operating costs in the processing of transit wagons is given, taking into account the elements of the time spent by the wagons.
Keywords: sorting station, time spent by wagons at the station, operating costs, expense rate, mathematical modeling.
INTRODUCTION
Operating costs are the most important element of railway transport due to high production, price level for transportation, quality of the transportation process and quality of transportation services. Streamlining operating costs is key to improving the efficiency of railway stations, including sorting station.
The quality of work of any sorting station is determined by one of the possible options for the technology of work, in which the operating costs for processing wagons will be minimal [1-10].
Evaluation of the quality of the marshalling yards is carried out according to the criterion - the minimum average time spent by a transit wagon with processing (hereinafter referred to as transit wagons) [1-4, 9, 10]. Compliance with the standard of time spent by a transit wagon at the sorting station plays a special role in minimizing the costs associated with the processing of wagons [1-8]. Therefore, when modeling the value of operating costs, it is necessary to take into account all the elements of the time spent by wagons at the sorting station [1, 2, 4, 9, 10].
MATERIALS AND METHODS
Many researchers have dealt with the modeling of operating costs at a sorting station, but they used a different set of parameters [6-8, 12-14]. For example, E.A. Sotnikov [7] notes that in order to calculate the operating costs associated with the processing of wagons at a sorting station, it is necessary to analyze the processing
ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
time in the station's parks, waiting for disbandment and formation. He suggests, in order to determine the monthly operating costs in the reception park, describe the action of these elements using the formula
Emon = 30 • N. mC At + tdisb) + 4,5xCgr , (1)
cos dism w—h\ pr wai J ? mon? V /
where tpr — processing time of the composition in the reception park, h; tWiasb — waiting time for disbandment of the composition, h; Cw—h — the present value of one wagon-hour; cmron — monthly salary of all employees of one group of inspectors; Ndismm — accordingly, the number of dismantling trains in the reception park and wagons in the compositions of these trains; x — number of train inspectors.
At the same time, formula (1) does not take into account the time cost by such elements as securing and fencing the train in the receiving park and waiting for the composition to be processed upon arrival.
A.A. Svetashev [6] proposed empirical formulas for calculating operating costs in the sorting park of the station
a) the costs associated with the accumulation of one composition:
Eacc = ewh 12(m — mfre + 2mo X (2)
b) costs associated with operations for the formation and rearrangement of the composition to the departure park:
E = Nt m e (X\
form form max wh ' (3 )
wherein mmax, m, mform — the average composition value, respectively, with a flexible
schedule and a firm composition rate, a flexible schedule with a flexible composition rate and a solid schedule; N — the number of formed trains, respectively, for each type of schedule; tform — time for the formation and rearrangement of the composition
to the departure park.
Thus, despite the uniformity of approaches to calculating operating costs at a sorting station, the parametric base used is very different.
RESULTS AND DISCUSSION
Modeling operating costs requires a corresponding mathematical description at each step of the executable technological process.
According to the parameters of the DO-24 VTs reporting form [11] and scientific works [1, 2, 4], we introduce the following designations, which include the elements of the time spent by transit wagons:
ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
u— number of the type of wagon processing, u = [1..U], for example, a set of operations for receiving and processing wagons in the reception park (RP) (u = 1), disbanding (u = 2), accumulation (u = 3), the formation (u = 4), departure at the departure park (DP) (u = 5);
v — the number of the enlarged sequence of the operation of the technological process, v = [1...V ], for example, anchoring and fencing (v = 1), and waiting for the processing of the composition in the RP (v = 2), treatment of the composition in the RP (v = 3), pending disbandment (v = 4), arrival (v = 5), thrust (v = 6), dissolution (v = 7), settling (v = 8), waiting to form and rearrange (v = 9), formation and rearrangement (v = 10), securing and fencing, and waiting for the processing of the composition in the DP (v = 11), processing of the train in the DP (v = 12), providing the train with traction (v = 13), providing the train with brakes (v = 14), waiting for departure (v = 15);
x — operation number, as part of the enlarged sequence of operations, x = [1... X ], for example, receiving a message about the departure of a train from a neighboring station (x = 1), coordination with the shunting dispatcher of the train receiving track (x = 2), preparation of the route for receiving the train at the station (x = 3),..., control of train passage along the route of departure (x = 115) [4]; o — type of reporting, for example a plan (o = 1), fact (o = 2); txvuo — time for surgery x, composed of v, spent in the processing of the species u transit car by type of reporting o;
tvuo — time for surgery v, spent on processing the type of transit wagon by type of reporting o:
t =Yt (4)
vuo ^^ xvuo V /
x=1
tuo — cumulative processing time u transit car by type of reporting o:
X V
t = Y Yt (5)
uo ^^ ^^ xvuo \ J
uo
x=l V=1
to - the time spent by the transit wagon at the sorting station for all types of processing u by type of reporting o :
X V U
t0=ZZZ1
xvuo (6)
x=1 v=1 u=1
ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
To determine the operating costs of a sorting station for a certain period, it is necessary to enter the time of the period, the average value of the number of disbanded and formed trains per day by the system and their length in wagons, etc.
Therefore, we introduce the following notation:
Ni and mj - accordingly, the number of arriving trains to disband (Ni, i = [1.../]) and wagons in compositions (mj, j = [1...J ]) these trains;
Nl and mk - respectively, the number of formed trains (Nl, l = [1...L]) and wagons in trains ( mk, k = [1...K ]) these trains;
mh - the number of wagons participating in the accumulation process on the track of the sorting park (h = [1...H ]);
C - accumulation parameter;
ew_h - expense rate of 1 car-hour;
The annual operating costs associated with the processing of wagons at the sorting station by elements of the time spent by a transit wagon is
J X=34 V=4
m,. • e,
Eu=l = 365 -V N. -V m - e .•TV t , (7)
cos / J i / J j w-h / 1 / 1 xvo ' (/)
i =1 j=1 x=1 v=1
I J X=50 V=8
Eu=2 = 365 -V N. -V m • e ^-YY t ,
cos / 1 i / 1 j w-h / , / , xvo' (O)
i=1 j=1 x=35 v=5
H
ECOf = 365 - C -V mh - ew-h, (9)
h=1
L K X=72 V=10
EUo=S4 = 365 - V N> - V mk - ew-h - V V t^, (10)
l=1 k=1 x=51 v=9
L K X=115 V=15
EOS5 = 365 -V N -V mk - ew-h - V V txvo, (11)
l=1 k=1 x=73 v=11
In addition, operating costs for the processing of wagons at the sorting station are associated:
1) with remuneration of employees;
d - number of the department involved in the processing of wagons, d = [1...D], for example, management of the organization of transportation (d = 1), management of logistics, cargo and commercial work (d = 2), carriage management (d = 3), locomotive operation department (d = 4), etc.;
i
ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
w- number of the executor (employee) of the management d, w = [1...W], for example, station attendant (DSP) (w = 1), chipboard operator (DSP) (w = 2), shunting dispatcher (w = 3), etc.;
Cd - average monthly salary of all employees in one department d; Sw - number of management employees d;
D WD
XEd = 365-X¿w Cd, (12)
d =1 w=1 d =1
2) with an increase in the sorting hump can be determined by the formula [7]
Eh = 365 - Mh - Ch +A + Etech/dev, (13)
pay
where - number of hump locomotives;
C - cost of maintaining one hump locomotive per day; A - capital costs to increase the power of the slide; tpay - standard payback period of capital investments; Etech/dev - annual operating costs associated with the maintenance of additional technical devices to increase the power of the hump.
3) with the content of shunting locomotives is determined by the formula [7]
Eshun = 365 -Mshun - Cshun, (14)
where Mshun - number of shunting locomotives;
Cshun - the cost of maintaining one locomotive underneath per day. Thus, the annual operating costs associated with the processing of wagons at the sorting station will add up:
D
ZEss =Eu=1 + Eu=2 + Eu=3 + Eu=4 + Eu=5 + V E + E +
Eyear Ecos ^ Ecos ^ Ecos ^ Ecos ^ Ecos ^ ¿^ Ed ^ Esh ^
d =1
+ Eshun + X Eoth, (15)
where X Eoth - other expenses (for example, maintenance of the track, technical devices, etc.).
ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
CONCLUSION
Many scientists have been involved in modeling the operating costs associated with the processing of wagons at sorting stations, but the sets of parameters they used differ significantly from each other. Therefore, to model the operating costs at the stations in this scientific work, the parameters of the DO-24 VTs reporting form, which are currently used on the railways of the CIS countries, were used.
Proposed model based on mathematical description (4)-(15) includes the stages of processing car flows for all processes, i.e. assessment of all costs by type of economic activity of each component involved in the processing of wagons. In addition, the developed model makes it possible to reliably analyze all the costs of processing transit wagons at a sorting station.
REFERENCES
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ACADEMIC RESEARCH IN EDUCATIONAL SCIENCES VOLUME 2 | ISSUE 9 | 2021
ISSN: 2181-1385
Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89
DOI: 10.24412/2181-1385-2021-9-445-451
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