An example of calculating time, speed and brake way of the car on the site of the second braking position at the hump yard under the influence of small crosswinds
Abstract
To present day the speed of sliding car in the theory of calculation of marshaling hump determined by the formula of free falling body, where the acceleration of free falling bodies are given with the inertia of the wheelsets, which is unacceptable. Therefore, for the first time the movement of the car on the part of the second hump brake position of marshaling hump under the influence of the small crosswinds was studied. Force relations that take place in the system “car-railway track” on the second hump brake position under the influence of the cross-wind of the small value was given. These force relations include “shifting” (i.e. the projection of the gravity of the car with load and cross-wind on the direction of movement of the car) and “restraining” forces. By the difference between “shifting” and “restraining” forces and weight of the car without inertia of the rotating parts (wheel pairs) and with using the basic law of dynamics of a body with non-ideal constraints (D’Alembert’ principle), acceleration of the car when driving in the second hump brake position under the influence of the cross-wind was calculated. Then, the braking time and the sliding speed of the car related to rail lines and braking tires of car retarders is determined by the classical formula for the track and speed of uniformly decelerated motion. On this basis, for the first time results of researching of car movement with acceleration in the second hump braking position is given. Graphic dependences of speed and the way of the car braking from the time of movement were built. By combining built graphic dependences rational time values of sliding speed and the braking way of the car were found. Presented results of researches can be used in the calculation of the motion time and speed of sliding of the car on the next parts of the hump, and in the future to complete development of the corrected program of calculation of the lowering part of a hump from its top to the estimated point.
About the Authors
K. T. Turanov
Ural State University of Railway Transport (USURT)
Russian Federation
Russian Federation
A. A. Gordienko
Ural State University of Railway Transport (USURT)
Russian Federation
Russian Federation
References
1. Rules and regulations of of designing marshalling devices on railways of 1520 mm gauge. Moscow, TEKhINFORM Publ., 2003, 168 p. (in Russ.).
2. Apattsev V. I., Efimenko Yu. I., Pravdin N. V. Zheleznodorozhnye stantsii i uzly [Railway stations and units]. Moscow, FGBOU “Uchebno-metodicheskiy tsentr po obrazovaniyu na zheleznodorozhnom transporte” Publ., 2014, 855 p.
3. Turanov Kh. T., Gordienko A. A. Nekotorye problemy teoreticheskoy predposylki dinamiki skatyvaniya vagona po uklonu sortirovochnoy gorki [Some problems of theoretical background of the dynamics of the car rolling down the slope hump]. Byulleten’ transportnoy informatsii, 2015, no.3, pp. 29 – 36.
4. Obraztsov V. N. Stantsii i uzly [Stations and units]. Moscow, Transzheldorizdat Publ., 1938, 492 p.
5. Turanov Kh. T., Gordienko A. A. Analiticheskoe opisanie dvizheniya vagona na pervom sko-rostnom uchastke sor-tirovochnoy gorki pri vozdeystvii vstrechnogo vetra maloy velichiny [Analytical description of the car movement on the first section of speed hump when exposed to small crosswinds]. Transport Urala, 2015, no.2, pp. 7 – 12.
6. Turanov, Kh.T., Gordienko A. A. Primer rascheta vremeni i skorosti vagona pri ego dvizhenii po vsey dline uchast-ka pervoy tormoznoy pozitsii sortirovochnoy gorki pri vozdeystvii vstrechnogo vetra maloy [Example of calcula-tion of time and speed of the car as it moves along the entire length of the first section of the brake position of hump yard under the influence of a small crosswind]. Izvestiya PGUPS, 2014, no. 4, pp. 64 – 71.
7. Turanov Kh. T., Gordienko A. A. Primer rascheta vremeni i skorosti vagona na vtorom skorostnom uchastke sortirovochnoy gorki pri vozdeystvii vstrechnogo vetra maloy velichiny po novoy metodike [An example of time and speed calculation for the car at the second speed hump yard section under the influence of small crosswinds by a new method].Vestnik Ural’skogo gosudarstvennogo universiteta putey soobshcheniya, 2015, no. 3, pp. 25 – 35.
8. Khabibulla Turanov, Andrey Gordienko and Irina Plakhotich. Simplified Analytical Description of Wagon Movement with Braking Action on the Marshalling Hump Section of the First Braking Position under the Impact of Fair Wind. Science and Technology, vol. 5 no. 4, December 2015, pp. 57 – 62. Doi: 10.5923/j.scit.2015 04.01.
9. Turanov Kh. T. Gordienko A. A., Plakhotich I. S. Primer rascheta skorosti vagona na uchastke pervoy tormoznoy pozitsii sortirovochnoy gorki s zatormazhivaniem pri vozdeystvii poputnogo vetra [Example of calculating the speed of the car at the site of the first braking position of hump yard with lockup under the influence of a favorable wind]. Byulleten’ transportnoy informatsii, 2015, no.12, pp. 29 – 35.
10. Loytsyanskiy L. G., Lur’e A. I. Kurs teoreticheskoy mekhaniki [Course of theoretical mechanics]. Moscow, Nauka Publ., 1983, vol. 2, 640 p.
11. Zemblinov S. V., Strakovskiy I. I. Аl’bom skhem elementov stantsiy i uzlov [Album of schemes of elements of units and stations]. Moscow, Vsesoyuz. izd.poligraf. ob’edin. MPS Publ., 1963, 89 p.
12. Kiryanov D. V. Mathcad 15. Mathcad Prime 1.0. St.Petersburg, BHV-Petersburg Publ., 2012, 432 p.
13. Kobzev V. A. Tekhnicheskiye sredstva sortirovochnykh gorok, obespechivayushchiye bezopasnost’ dvizheniya [Technical means of marshalling yards to ensure traffic safety]. Moscow, MIIT Publ., 2009, 92 p.
Review
For citations:
Turanov K.T., Gordienko A.A. An example of calculating time, speed and brake way of the car on the site of the second braking position at the hump yard under the influence of small crosswinds. RUSSIAN RAILWAY SCIENCE JOURNAL. 2016;(2):123-128. (In Russ.)
Views:
825
.jpg)
Email this article 