RECENT RESEARCHES OF THE LATERAL FLEXIBILITY OF RAIL THREAD UNDER COMBINED ACTION OF VERTICAL AND HORIZONTAL FORCES

Authors

DOI:

https://doi.org/10.15802/stp2015/57021

Keywords:

railway track, rail, rail thread stiffness, elastic modulus

Abstract

Purpose. Studying the characteristics of spatial flexibility of rail thread is necessary for solving problems in calculation rails durability in full formulation, namely under combined action of vertical and horizontal forces and torque moment on the track. Characteristics of torsional lateral horizontal elasticity and rail thread are the least researched under combined action of vertical and horizontal forces on the track. In the current method of engineering calculation the track durability the impact on track horizontal forces are counted only indirectly through the use of so-called «factors of influence», which are not connected with calculations. That is, the current method cannot let obtain the exact strains and stresses of rails under combined action on the track vertical and horizontal forces. The article purpose is solving the problem of calculation the real lateral modulus of railway track under combined action of vertical and horizontal forces. Methodology. In this paper the complex method of solving the problem was used: with the help of experimental method characteristics of rail horizontal transverse stiffness when exposed only horizontal force were measured; theoretical researches were used for calculation the actual lateral elastic modulus of track Uy(T) (when combined action of vertical and horizontal forces on track takes place). Findings. New data characteristics of lateral flexibility of rail thread were obtained for modern designs of the railway track on concrete and wooden sleepers with rails R65, UIC60, R50, R43 and with fastenings КБ, КПП-5, КПП-1, Д0. Originality. For the first time in domestic researches, experimental and theoretical solution of characteristics of lateral flexibility of rail threads under combined action of vertical and horizontal wheel loads with positioning the functional dependence of variable transverse modulus of the rail elasticity Uy(T) from the ratio of co-operating vertical and horizontal dynamic forces Pdyn / Нdyn . Practical value. The results allow calculating the strength of rail threads considering combined action of vertical and horizontal forces on the track for concrete and wooden sleepers with significantly higher accuracy than with the current method of calculation the track for strength.

Author Biography

E. I. Danilenko, State Economic and Technological University of Transport

Dep. «Railway Track and Track Facilities»,Lukashevich St., 19, Kyiv, Ukraine, 03049, tel. +38 (044) 591 51 47

References

Albrekht V.G., Bromberg Ye.M., Zverev N.B. Besstykovoy put [Welded railroad]. Moscow, Transport Publ., 1982. 206 p.

Verigo M. F., Kogan A. Ya. Vzaimodeystviye puti i podvizhnogo sostava [Track and rolling stock interaction]. Moscow, Transport Publ., 1986. 559 p.

Verigo M.F., Krepkogorskiy S.S. Obshchiye polozheniya dlya korrektirovki Pravil raschetov zheleznodorozhnogo puti na prochnost i predlozheniya po izmeneniyu etikh pravil [General provisions for updating calculation rules of the railway track on strenth and proposals to change these rules]. Trudy Vserossiyskogo nauchno-issledovatelskogo instituta zheleznodorozhnogo transporta [Proc. of All-Russian Scientific Research Institute of Railway Transport], 1972, issue 466, pp. 4-50.

Danilenko E.I., Rybkin V.V. Pravyla rozrakhunkiv zaliznychnoi kolii na mitsnist i stiikist: TsP-0117 [Calculation rules of a railway track for strength and stability: TsP-0117]. Kyiv, Transport Ukrainy Publ., 2006. 168 p.

Danilenko E.I., Velinets V.P. Teoreticheskoye resheniye zadachi po opredeleniyu realnogo bokovogo modulya uprugosti puti, pri sovmestnom deystvii na relsovuyu nit gorizontalnykh i vertikalnykh sil [The theoretical solution to the problem of determining the real side of the elastic modulus track under the joint action on rail thread of horizontal and vertical forces]. Zbirnyk naukovykh prats Derzhavnoho ekonomiko-tekhnolohichnoho universytetu transportu [Proc. of State Economy and Technology University of Transport], 2014, issue 24, pp.106-122.

Yershkov, O. P. Raschet relsa na deystviye bokovykh sil v krivykh [Calculation of the rail to the effect of lateral forces in curves]. Trudy Vserossiyskogo nauchno-issledovatelskogo instituta zheleznodorozhnogo transporta [Proc. of All-Russian Scientific Research Institute of Railway Transport], 1960, issue 192, pp. 5-59.

Yershkov O.P. Kharakteristiki prostranstvennoy uprugosti relsovoy niti [Characteristics of spatial elastic rail thread]. Trudy Vserossiyskogo nauchno-issledovatelskogo instituta zheleznodorozhnogo transporta [Proc. Of All-Russian Scientific Research Institute of Railway Transport], 1960, issue 192, pp. 59-101.

Nastechyk M.P., Markul R.V., Savytskyi V.V. Vplyv pruzhnykh deformatsii v elementakh skriplennia typu KPP-5 na velychynu syly prytyskannia reiky do pidreikovoi osnovy [Elastic deformations impact in elements of the rail fastening, type КПП-5 on a size of pressing force of the rail to the subrail basis]. Nauka ta prohres transportu. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu – Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, 2015, no 4 (58), pp. 110-120.

Basilov V.V., Chernyshev M.A. Spravochnik inzhenera-puteytsa [Directory of a railway engineer]. Moscow, Transport Publ., 1972, vol. 1. 768 p.

Taturevich A.P. Rezultaty opredeleniya fakticheskikh znacheniy zhestkosti puti dlya issledovaniy vzaimodeystviya puti i podvizhnogo sostava [The results of determining the actual values of stiffness ways to study the interaction of a track and 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], 2003, issue 2, pp. 95-100.

Timoshenko S.P. Metod issledovaniy statisticheskikh i dinamicheskikh napryazheniy v relse [Research method of statical and dinamical stresses in a rail]. Statisticheskiye i dinamicheskiye problemy teorii uprugosti [Statistical and dynamic problems of the elasticity theory]. Kyiv, Naukova dumka Publ., 1975, pp. 209-220.

Timoshenko S.P. Napryazheniya v zheleznodorozhnom relse [Stresses in a railway rail]. Statisticheskiye I dinamicheskiye problemy teorii uprugosti [Statistical and dynamic problems of the elasticity theory]. Kyiv, Naukova dumka Publ., 1975, pp. 318-355.

Umanov M.I., Kovalev V.V., Sova S.N. Issledovaniya napryazhenno-deformirovannogo sostoyaniya puti so skrepleniyem KPP [Research of stress-strain state of the track of the КПП staple]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2003, issue 2, pp. 101-105.

Liu C., Zeng Zh. P., Wu B., Yuan J.U., He X. F. Experimental study on the transverse stiffness of WJ-8 rail fastening. Trans Tech Publications, Switzerland Applied Mechanics and Materials, 2014, vol. 596, pp. 3-6. doi: 10.4028/www.scientific.net/amm.596.3

Holder D.E., Williams B.A., Dersch M.S., Edwards J. R., Barkan C.P.L. Quantification of Lateral Forces in Concrete Sleeper Fastening Systems Under Heavy Haul Freight Loads. (21.06.–24.06.2015). Perth, Australia, 2015. – Available at: http://railtec.illinois.edu/articles/Files/Conference%20Proceedings/2015/IHHA%20-2015%20Paper%20219%20Holder_Final.pdf (12 November 2015).

Koc W., Wilk A., Chrostowski P., Grulkowski S. Tests on lateral resistance in railway tracks during the operation of a tamping machine. Proc. of IMechE, 2011, vol. 225, pp. 325-34. doi: 10.1243/09544097jrrt324

Published

2015-12-24

How to Cite

Danilenko, E. I. (2015). RECENT RESEARCHES OF THE LATERAL FLEXIBILITY OF RAIL THREAD UNDER COMBINED ACTION OF VERTICAL AND HORIZONTAL FORCES. Science and Transport Progress, (6(60), 65–77. https://doi.org/10.15802/stp2015/57021

Issue

Section

RAILROAD AND ROADWAY NETWORK