Evaluation of longitudinal loading of tank trains during motion in longitudinal changes of gradient

Authors

  • S. V. Myamlin Dep. “Cars and Rolling Stock”, Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan
  • Ya. N. Romanyuk 2Planning and Design Engineering Bureau of Automation Control Systems for Railway Transport in Ukraine

DOI:

https://doi.org/10.15802/stp2013/14757

Keywords:

longitudinal forces, mathematical simulation, changes of gradient, tank trains

Abstract

Purpose. To research the tank train longitudinal loading during motion by track sections with changes of gradient. The trains of different length that consist of bogie tank wagons should be examined. Influence of cargo type on longitudinal loading of train during motion in concave section of track should be evaluated. Methodology. The level of the largest longitudinal forces was estimated by mathematical simulation. It was assumed that change of gradient is formed by two grades with baffle platforms, length 50 meters, so that the algebraic difference of limiting grades vary from 10‰ to 40‰, pitch 10‰. The initial speeds were 40, 60, 80, 100, 120 km/h. For evaluation of the longitudinal loading the regulating braking and motion "by coasting" was considered. For evaluation of buffing loads the entry to the concave gradient change of expanded train is considered, and in order to determine the quasi-static forces the compressed train is considered. Findings. As a result of calculations the dependencies of maximal longitudinal forces in the trains on the cargo type, the algebraic difference of the grades, the number of tank wagons, the initial speed, motion modes, and initial gaps condition in the train were obtained. Originality. The longitudinal loading of freight cars of different length formed by the similar bogie tank wagons with one locomotive was obtained. The locomotive is placed in the train head during motion in concave track sections with various algebraic difference of the grades "on coasting" and during the regulating braking mode. The obtained results can be used for parameters standardization of profile elevation of the track. Practical value. The obtained results show that during operation of tank trains on track sections of complex breakage the most dangerous is regulating braking of preliminary compressed trains during entering on concave parts of track. Level of the greatest buffing and quasi-static longitudinal forces is almost independent of cargo and slightly depends on the initial speed.

Author Biographies

S. V. Myamlin, Dep. “Cars and Rolling Stock”, Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan

Lazaryan Str., 2, 49010, Dnipropetrovsk, Ukraine, tel. +38 (065) 776 84 98, fax +38 (065) 776 85 65, e-mail sergeymyamlin@gmail.com

Ya. N. Romanyuk, 2Planning and Design Engineering Bureau of Automation Control Systems for Railway Transport in Ukraine

Kalinin alley, 4, 49010, Dnipropetrovsk, Ukraine

References

Blokhin Ye.P., Manashkin L.A. Dinamika poyezda [Train dynamics]. Moscow, Transport Publ., 1982. 222 p.

Vershinskiy S.V. Ustoychivost vagonov ot vyzhimaniya prodolnymi silami pri tormozhenii poyezda [Car stability of extrusion by the longitudinal forces during the train breaking]. Trudy TsNII MPS – Proceedings of Central Research Institute of the Ministry of Communications, 1970, issue 425, pp. 4-38.

Grebenyuk P.T. Dinamika tormozheniya gruzovykh poyezdov [Breaking dynamics of the freight cars]. Vestnik VNIIZhT – VNIIZhT Bulletin, 2002, no. 1, pp. 23-27.

Morchiladze I.G., Nikodimov A.P., Sokolov M.M., Tretyakov A.V. Zheleznodorozhnyye tsisterny. Kon-struktsii, tekhnicheskoye obsluzhivaniye i remont [Railway tanks. Constructions, maintenance and repair]. Mos-cow, IBS-Kholding Publ., 2006. 516 p.

Kolomiychenko V.V., Bespalov N.G., Semin N.A. Avtostsepnoye ustroystvo podvizhnogo sostava [Automatic coupler of the rolling stock]. Moscow, Transport Publ., 1980. 185 p.

Bogomaz G.I., Naumenko N.Ye., Pshinko A.N., Myamlin S.V. Nagruzhennost vagonov-tsistern pri perekhod-nykh rezhimakh dvizheniya poyezdov [Loading of the tank cars during transient modes of the train motion]. Kyiv, Naukova dumka Publ., 2010. 215 p.

Blokhin Ye.P., Ursulyak L.V., Zheleznov K.I., Romanyuk Ya.N. O vozhdenii dlinnosostavnykh poyezdov [On the operation of the long trains]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University named after Academician V. Laz-aryn], 2009, issue 30, pp. 48-56.

Blokhin Ye.P., Garkavi N.Ya., Ursulyak L.V., Zheleznov K.I., Romanyuk Ya.N. Programmno-vychislitelnyy kompleks dlya issledovaniya prodolnoy nagruzhennosti nalivnykh poyezdov [Software-computing system for the research of the longitudinal loading of the tank trains]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University named af-ter Academician V. Lazaryn], 2009, issue 30, pp. 36-48.

Cherkashin Yu.M. Bezopasnost dvizheniya zheleznodorozhnogo podvizhnogo sostava [Traffic safety of the railway rolling stock]. Moscow, Intekst Publ., 2010. 176 p.

Cole C. Improvements to Wagon Connection Modeling for Longitudinal Train Simulation. Conference on Railway Engineering. Rockhampton, 1998, pp. 187-194.

Hirt C.W, Cook S.L., Butler T.D. A Lagrangion Method for Calculation the Dynamics of an Incompressible Fluid with Free Surface, 1970, vol. 5, pp. 103-124.

Muller L., Witt T. TRAIN—A Computer Model for the Simulation of Longitudinal Dynamics in Trains. Con-ference on Railway Engineering. Rockhampton, 1998, pp. 181-186.

Simson S., Cole C., Wilson P. Evaluation and Training of Train Drivers during Normal Train Operations. Con-ference on Railway Engineering. Wollongong, 2002, pp. 329-336.

Downloads

Published

2013-06-25

How to Cite

Myamlin, S. V., & Romanyuk, Y. N. (2013). Evaluation of longitudinal loading of tank trains during motion in longitudinal changes of gradient. Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, (3(45), 125–134. https://doi.org/10.15802/stp2013/14757

Issue

Section

ROLLING STOCK AND TRAIN TRACTION