Info: Zenodo’s user support line is staffed on regular business days between Dec 23 and Jan 5. Response times may be slightly longer than normal.

Science and Transport Progress
Published April 29, 2015 | Version v1
Journal article Open

ABOUT THE EVALUATION OF THE LONGITUDINAL FORCES LEVEL EFFECTING THE TRACK DISPLACEMENT AT TRANSIENT MODES OF TRAIN MOVEMENT

Creators

  • 1. Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Ukraine
  • 2. Insurance corporation «Таsо – Garantiya», Ukraine

Description

Purpose. Study the transient modes effect of movement on the track displacement for the freight train safety control is supposed in this paper. For this it is necessary to investigate the longitudinal dynamics of a train on the track displacement. Simultaneously to assess the longitudinal forces level of a track and rolling stock interaction. Methodology. The level of the longitudinal forces, effecting the track displacement, was evaluated using mathematical modeling of longitudinal vibrations of the trains at transient modes of motion caused by braking. It was considered that each train vehicle consists of a body (solid) and the wheel sets, connected with the body by friction bearings (inelastic link). It was believed that during the movement of each train vehicle the vertical plane of its symmetry coincident with the vertical plane of symmetry of the assembled rails and sleepers. At simulation it was also supposed that in the process of translational motion of the vehicle body wheels make pure rolling along the rail without slipping on it. Findings. In the results of calculations the values of the longitudinal forces at different types of braking were obtained (it is regenerative braking and pneumatic one) under quasi-static and shock transients. For this various initial state of clearances in the inter-car connections up to beginning of transient was considered. The level of dynamic additives to longitudinal forces of interaction between wheel and rail that are substantially depending on vehicle accelerations was assessed. Originality. The transient regimes effect of trains movement caused by braking on the level of the longitudinal forces of track and rolling stock interaction was investigated. The longitudinal load of freight trains with regenerative and pneumatic braking was researched. The effect of the initial state of the train and different modes of braking on a dynamic additive to the longitudinal forces of the interaction between the track and rolling stock, which may effect the displacement of assembled rails and sleepers, was estimated. Practical value. The obtained results can be used to select rational modes of braking of freight trains, especially on lengthy down grade, from the positions prevent possible track displacement.

Files

42179-Article Text-92174-1-10-20150706.pdf

Files (754.7 kB)

Name Size Download all
md5:423acee79b3b5382d6199d8cf5448730
754.7 kB Preview Download

Additional details

Related works

Is identical to
Journal article: http://stp.diit.edu.ua/article/view/42179 (URL)

References

  • Blokhin Ye.P., Zheleznov K.I., Ursulyak L.V. Vychislitelnyy kompleks dlya resheniya zadach bezopasnosti i ustoychivosti dvizheniya podvizhnogo sostava zheleznykh dorog [Computing system for solving problems of security and stability of railway rolling stock]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2007, issue 18, pp. 106-114.
  • Blokhin Ye.P., Manashkin L.A. Dinamika poyezda [Dynamics of a train].Moscow, Transport Publ., 1982. 222 p.
  • Verigo M.F., Kogan A.Ya. Vzaimodeystviye puti i podvizhnogo sostava [Track and Rolling stock Interaction].Moscow, Transport Publ., 1986. 558 p.
  • Grebenyuk P.T. Dinamika tormozheniya gruzovykh poyezdov [The braking dynamic of freight trains]. Vestnik Vserossiyskogo nauchno-issledovatelskogo instituta zheleznodorozhnogo transporta [Bulletin of All-Russian Research Institute of Railway Transport], 2002, no. 1, pp. 23-27.
  • Danilenko E.I., Rybkin V.V. Pravyla rozrakhunkiv zaliznychnoi kolii na mitsnist i stiikist [Terms of railway line calculations for strength and stability]. Kyiv, Transport Ukrainy Publ., 2006. 168 p.
  • Zhelnin G.G., Verkhotin A.A., Shinkarev B.S. Ustoychivost relsoshpalnoy reshetki sdvigu pri vysokikh skorostyakh dvizheniya [Track panel stability of displacement at high speeds]. Trudy Tsentralnogo nauchno issledovatelskogo instituta Ministerstva putey soobshcheniya [Proc. of Central Scientific Research Institute of the Railways Ministry]. Moscow, Transport Publ., 1978, issue 592, pp. 106-114.
  • Kogan A.Ya. Prodolnyye sily v zheleznodorozhnom puti [Longitudinal forces in the railway track]. Trudy Tsentralnogo nauchno issledovatelskogo instituta Ministerstva putey soobshcheniya [Proc. of Central Scientific Research Institute of the Railways Ministry].Moscow, Transport Publ., 1967, issue 332, 168 p.
  • Menshikova V.I. Dinamicheskiye prodolnyye sily i peremeshcheniya relsov zheleznodorozhnogo puti [Dynamic longitudinal force and rails moving of the railway track]. Trudy Tsentralnogo nauchno issledovatelskogo instituta Ministerstva putey soobshcheniya [Proc. of Central Scientific Research Institute of the Railways Ministry].Moscow, Transport Publ., 1972, issue 466, pp. 83-187.
  • Blokhin Ye.P., Ursulyak L.V., Zheleznov K.I., Romanyuk Ya.N. O vozhdenii dlinnosostavnykh poyezdov [About driving of long compound trains]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after AcademicianV. Lazaryan], 2009, issue 30, pp. 48-56.
  • Blokhin Ye.P., Manashkin L.A., Stambler Ye.L. Raschety i ispytaniya tyazhelovesnykh poyezdov [Calculations and tests of heavy trains].Moscow, Transport Publ., 1986. 264 p.
  • Esveld C. Modern railway track. Zaltbommel. TheNetherlands, MRT-Productions, 2001. 632 p.
  • Mohammadi S., Nasr A. Effects of the power unit location on in-train longitudinal forces during brake application. Intern. Journal of Vehicle Systems Modelling and Testing, 2010, no. 5 (2-3), pp. 176-196. doi: 10.1504/ijvsmt.2010.037125.
  • Sun Y.Q., Dhanasekar M. A dynamic model for the vertical interaction of the railtrack and wagon system. Intern. Journal of Solids and Structures, 2002, vol. 39, pp. 1337-1359. doi: 10.1016/s0020-7683(01)00224-4.
  • Tournay H. Railwheel interaction from a track and vehicle design perspective. Proc. of Intern. Heavy Haul Association's Conf. on wheelrail interaction (14-17 June 1999).Moscow, 1999, pp. 54-55.
  • Zhao X., Wang C., Ma D. Influence of locomotive wireless sync control technology on the longitudinal force of 20000 t heavy haul combined train. China Railway Science, 2008, no. 29 (3), pp. 78-83.