Engineering /
4.transport
Prof. Togizbayeva B.B., Khassenova Zh.E.
Karaganda State Technical University, Kazakhstan
Determination
of the optimal range of wagons arriving at the cargo fronts
Under the conditions of the uneven
arrival of wagons, with the aim of improving the organization of the shunting
and freight transportation by calculation must be determined the maintenance
interval of cargo fronts.
In determining the magnitude of the
interval for cargo wagons fronts is necessary to consider its dependence on the
number of simultaneously serviced cargo fronts, for which is defined by the
total maximum duration of the cargo operation, resulting conditions:
where 
- the minimum service interval of cargo front, hour;
- time to complete cargo
operations,hour;;
- time to perform the operation arrangement with assembling of wagons,
hour;
- the right timewhich is necessaryto move the wagons to the front of
this freight.
By analyzing the statistical
distribution of the interval between innings of cars on separate cargo fronts
can determine the probability of the optimal interval between innings, and the
expected probability of demurrage before cargo operations and easy loading and
unloading mechanisms in the case when the interval between innings more than
the time it takes toperformance of freight operations.
The time of fulfillment of cargo
operations depends on the number of simultaneously processed wagons, the number
of mechanisms, their hourly productivity, additionaltime on the set-closing
operation and can be determined by the formula:
where 
- the number of wagons in filing;
- The load of the wagon, t;
- The number of loading and
unloading mechanisms at the i-th front of the cargo;
- hourly capacity of cargo
handling equipment, t / h;
- Time for set-closing
operations.
The interval between innings equal
to 
determine from the following
expression
,
Such a way with a probability of P (
) submission wagons on the front of the cargo will be produced on the
minimum interval.
The distribution function for
transmission intervals of arrival cargo front determined in the range of 0 to 
by the formula:
,
will determine the position when
arriving wagons await the start of the cargo operations.
The numerical value of the optimum
range is within the
,
where - themaximumdurationforcargooperation, h;
- run time of shunting operations on the group cargo front, h.
Consequently, the time for cargo
front group required to perform the maximum load operation and production of
shunting works determine the interval of service. On the amount of the space
are imposed a limitations by the conditions of technology services of group
front. Moreover, improvementof themaintenance technology leads to a reduction intervals
due to:
- reducing the duration and maximum
combination of operations for the presentation and cleaning of wagons;
- Strengtheningof technical
management tools of shunting routes and cargo handling operations;
- The combination of the run-time of
technical and commercial operations and reducing their number;
- Timely and qualitative
determination of the maximum load operation.
Violation of technology and priority of
cargo fronts service, inaccurate determination of the maximum load operation or
an increase in its operation can lead to high costs of wagon-hours service for individual and group commercial fronts, and thus
violating the sequence of operations.
The frequent interval deviation from
the planned arrival of transmission leads to abrupt complications in the
production of shunting operations to dismantle and service of cargo fronts and
causes extra downtimes of wagons and machinery.
From this we can conclude that the
calculation of the optimal interval of arrival for cargo fronts now is urgent
and solvable problem.
References:
1. Кукушкин И.И.
Комплексное развитие и использование магистрального и промышленного транспорта.
«Транспорт», М., 1966.
2. Феропонтов Г.В.
Эксплуатация железнодорожных подъездных путей. «Транспорт», М., 1972.
3. Иванов, С.Д.
Оптимизация обслуживания грузовых фронтов предприятий промышленного
железнодорожного транспорта (ППЖТ): автореф. дис. на соиск. учен. степ. канд.
тех. наук./ Иванов Савелий Дорофеевич; Московский институт инженеров
железнодорожного транспорта. – Москва, 1984.
4. Сотников Е.А.
Интенсификация работы сортировочных станций. М., "Транспорт", 1979.
5. Сотников И.Б.
Взаимодействие станции и участковых железных дорог. «Транспорт», М., 1976.
6. Феропонтов Г.В.
Эксплуатация железнодорожных подъездных путей. «Транспорт», М., 1972.
7. Промышленный
транспорт. Под редакцией Дерибас А.Т. «Транспорт». М., 1974.