HIGH HIGH-SPEED MOVEMENT OF PASSENGER ELECTRIC TRAINS ON THE SECTION TASHKENT-SAMARKAND OF THE UZBEK RAILWAY

ABSTRACT

The issues of organizing the high-speed movement of passenger electric trains "Afrosiab" with the justification of the kinematic parameters of their movement on the Tashkent-Samarkand section of the Uzbek railway, obtained in the form of tabular data and graphical dependencies, are considered. It has been established that the average speed and running time of the Afrosiab high-speed electric train on the Tashkent-Samarkand section, respectively, is 151.4 km/h and 130 minutes.

АННОТАЦИЯ

Рассмотрены вопросы организации скоростного движения пассажирских электропоездов «Афросиаб» с обоснованием кинематических параметров их движения на участке Ташкент-Самарканд Узбекской железной дороги, полученных в виде табличных данных и графических зависимостей. Установлено, что средняя скорость движения и время хода скоростного электропоезда «Афросиаб» на участке Ташкент-Самарканд, соответственно, составляют 151,4 км/час и 130 минут.

Keywords: high speed, passenger train, haul, electric train, railway, wagon body, passive tilt system.

Ключевые слова: высокоскоростной, пассажирский поезд, перегон, электропоезд, железная дорога, кузов вагона, пассивная система наклона.

The issue aimed at organizing high-speed passenger trains on the railways of Uzbekistan is one of the priorities in the socio-economic development of the regions of the republic in the near and long term.

The above indicates the relevance and significance of research, which consists in substantiating the kinematic parameters of the movement of high-speed passenger electric trains on sections of the Uzbek railways.

The implementation of the above was associated with the operation of a high high-speed railway line on the Tashkent-Samarkand section, along which the movement of high-speed passenger trains was organized by «Afrosiyob» electric trains with a passive system for incline car bodies and concentrated  thrust [1] produced by the Spanish company «Talgo».

In [2], the main provisions of the Concept for the development of high-speed and high high-speed passenger trains on the railways of Uzbekistan are highlighted and formulated, the first stage of which was associated with the preparation of high high-speed traffic and the commissioning of the «Afrosiyob» electric train at the training ground of the Tashkent-Samarkand direction.

The technical characteristics of the «Afrosiyob» high-speed electric train, which is a composition of permanent composition formation with its own electric traction [3] and consisting of two head motor cars, eight passenger cars and a dining car, are given in the study [1], which also states that at the initial stage, the distance between the cities of Tashkent and Samarkand of 344 kilometers was covered by the mentioned train in 155 minutes.

The conditional scheme of the range of high-speed passenger trains, organized by high-speed electric trains «Afrosiyob» on the Tashkent-Samarkand direction, is shown in fig. 1, where the following railway lines are indicated: 1 - reconstructed; 2 - newly built, high-speed; 3 - existing, ordinary.

Figure 1. Conventional scheme of the high-speed traffic polygon on the direction Tashkent - Samarkand of the Uzbek railway

At present, the total length of the operating high-speed railway line Tashkent-Samarkand is 328 km, of which 120 km are for ordinary passenger ( electric locomotives «Uzbekiston») and high-speed («Afrosiyab» electric trains) traffic of passenger trains -  are newly built, new, high-speed sections Yangiyer-Jizzakh and Gallyaaral- Siding No. 19. On conventional railway lines reconstructed for high-speed traffic (sections Tashkent-Yangiyer and Jizzakh-Bogarnoe-Samarkand), the transportation process of freight, passenger and suburban trains is implemented by locomotives with various types of traction, including multiple unit (suburban traffic). And on the existing, ordinary, railway sections of the Syrdarya-Jetysay-Jizzakh and Yangiyer-Khavast-Jizzakh, as a rule, are organized movement only freight trains.

In table 1 and in fig. 2, respectively, shows the calculated (design) and actual values of the highest permissible speeds and the schedule time for the passage of the high-speed electric train «Afrosiyob», as well as histograms of their distribution over conditional hauls and separate points on the Tashkent-Samarkand railway section.

Table 1.

Travel time and speed movement of the electric train «Afrosiyob» on the section Tashkent-Samarkand

Calculations have established that the actual average speed of the «Afrosiyob» high-speed electric train for both directions of the Tashkent-Samarkand section is 151.4 km/h. Therefore, the passage of this section at such a speed allows the Afrosiyob electric train, in comparison with the initial stage of its operation [1], to reduce the travel time between Tashkent and Samarkand by 25 minutes.

An analysis of the world experience in the development and organization of high-speed rail traffic shows that high-speed rail transport quite successfully competes with air and road transport for mass transportation over distances of 400-800 km in daytime trains and 1700-2500 km in sleeping cars in night trains. Also, compared with these modes of transport, high-speed rail transport has the lowest specific rate for the emission of various pollutants and harmful substances into the environment, and the high-speed lines themselves, with equal passenger flows, occupy a smaller area than is necessary for highways and airports.

Figure 2. The parameters of the passage of the high-speed electric train «Afrosiyob» along the hauls of the Tashkent-Samarkand section

Thus, the activities and new, promising, technical solutions and technologies aimed at the formation and implementation of high-speed traffic in Uzbekistan and neighboring countries in general, and in the Tashkent-Samarkand section in particular, will become very important not only in the development of the entire infrastructure of high-speed rail lines, but will also ensure an increase in the growth of well-being and an improvement in the quality of life of the population, and will also contribute to an increase in the level of civilization in the regions of our republic and neighboring states.

Considering that the conditions for the stability of the movement of the crew of the high-speed passenger electric train «Afrosiyob» in the curved sections of the railway track were not considered by the authors, it is necessary, in the future, to continue the research, based on the dynamic components of the specified movement process.

Reference:

1. Ablyalimov O. S. On the issue of organizing high-speed passenger train traffic on the Tashkent-Samarkand section of the Uzbek railway [Text] / O. S. Ablyalimov, O. M. Kurbanov // Materials of the scientific seminar «Actual issues of high-speed traffic». - Tashkent: TashIIT, 2013. - pp. 10-13.
2. Uldjabayev K. U. Development of high-speed traffic on the railways of Uzbekistan [Text] / K. U. Uldjabayev, V. K. Yarashova. - Tashkent:Extreme Press, 2010. - 136 p.
3. Luvishis А. L. High-speed trains on the railways of the OSJD member countries [Text] / A. L. Luvishis // OSJD Bulletin. Technical and economic information magazine. - Warsaw, No. 4, 2012. – pp. 17-27.