FEATURES OF PERCEPTION OF LOADING ELEMENTS OF THE RAILWAY TRACK AT HIGH SPEEDS OF THE MOVEMENT

D. M. Kurhan

doi:10.15802/stp2015/42172

Authors

D. M. Kurhan Dep.«Track and Track Facilities», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel./fax + 38 (056) 373 15 42, e mail kurgan@brailsys.com, ORCID 0000-0002-9448-5269, Ukraine https://orcid.org/0000-0002-9448-5269

DOI:

https://doi.org/10.15802/stp2015/42172

Keywords:

superstructure, high-speed movement, tension of rail, rail deflection, wave model, slab track, ground distortion

Abstract

Purpose. Increase the train speeds movements requires not only the appropriate technical solutions, but also methodological-calculated. Most of the models and methodologies used for solving problems of stress-strain state of the railroad tracks, are based on assumptions and hypotheses adequate only for certain speeds. In the framework of this work will be discussed theoretical background of the changing nature of perceptual load elements of the railway track at high speeds and investigated the numeric parameters of the processes by means of mathematical modeling. As a practical purposes is expected to provide the levels of train speed, the boundaries of which can reasonably exclude the possibility of occurrence of the considered effects. Methodology. To achieve these objectives was used principal new model of railway track based on wave propagation theory stresses in the elastic system to study the impact of the movable load, take into account that the deflection in a particular section of the road starts even while the wheels at some distance, and moving the wheels farther from the selected section of the wave front elastic strain continues to spread. According to the results of simulations explores the changing shape of the wave front voltages in time for the foundation under the rail. If the train speeds substantially less than the velocity propagation of elastic waves, the wheel remains in the area implemented deformations. Findings. Alternative calculations for various parameters of the railway track (especially for different soil conditions) determined the levels of train speed, the boundaries of which can reasonably exclude the possibility of occurrence of the considered effects. Originality. The proposed theoretical study and implementation in the form of mathematical models for processes that occur in the perception of load elements of the railway track at high speeds. Practical value. According to simulation results obtained levels of speeds, which define the appearance of the considered dynamic effects in the base under the rail, can be used to justify path construction or establishment of appropriate values of allowable velocities for the implementation of traffic at high speeds.

Author Biography

D. M. Kurhan, Dep.«Track and Track Facilities», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel./fax + 38 (056) 373 15 42, e mail kurgan@brailsys.com, ORCID 0000-0002-9448-5269

Д. М. Курган

References

Bondarenko I.O., Kurhan D.M. Vyrishennia zadach nadiinosti systemy na osnovi modeliuvannia napruzheno-deformatsiinoho stanu zaliznychnoi kolii zasobamy teorii rozpovsiudzhennia pruzhnykh khvyl [Solution of the problems of system reliability by modeling the stress-strain state of rail track using the theory of elastic waves propagation]. Nauka ta prohres transportu. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu – Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, 2013, no. 1 (43), pp. 139-148.

Bondarenko I.O., Kurhan D.M. Zastosuvannia teorii rozpovsiudzhennia pruzhnykh khvyl dlia vyrishennia zadach napruzheno-deformatsiinoho stanu zaliznychnoi kolii [Application the theory of elastic waves distribution for the problems solution of stress-strain state of the railway]. Transportni systemy i tekhnolohii. Zbirnyk naukovykh prats Derzhavnoho ekonomiko-tekhnolohichnoho universytetu transportu [ Transport system and Technology. Proc. of State Economy andTechnologyUniversity of Transport]. Kyiv, 2011, no. 18, pp. 14-18.

Brandl Kh., Paulmichl A. Vzaimodeystviye osnovaniy i sooruzheniy vysokoskorostnykh zheleznykh dorog. [The interaction of the grounds and structures of high-speed railways]. XIII Dunaysko-Yevropeyskaya konferentsiya po geotekhnike (29–31.05.2006). [Danube-European conference on geotechnical engineering,Lublin,Slovenia (29–31 May 2006)]. Lyublyana, Sloveniya. Available at: http://www.gerec.spb.ru/journals/11/files/11009.pdf (Accessed 17 February 2015).

Danilenko E.I. Zaliznychna koliia. Ulashtuvannia, proektuvannia i rozrakhunky, vzaiemodiia z rukhomym skladom [Railway track. Device design and calculations, interaction with rolling stock]. Kyiv, Inpres Publ., 2010. Vol. 2. 456 p.

Danilenko E.I., Rybkin V.V. TsP-0117. Pravyla rozrakhunkiv zaliznychnoi kolii na mitsnist i stiikist [TsP-0117. The computations rules of the railway track for strength and stability]. Kyiv, Transport Ukrainy Publ., 2004. 64 p.

Petrenko V.D., Alkhdur A.M., Tiutkin O.L., Kovalevych V.V. Doslidzhennia parametriv modernizovanoho zemlianoho polotna [Research of parameters of the modernized subgrade]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2012, issue 41, pp. 164-169.

Kolskiy G. Volny napryazheniya v tverdykh telakh [Stress Waves in Solids],Moscow, Inostrannaya literatura Publ., 1955. 192 p.

Кurgan D.М., Bondarenko I.О. Model napryazhenno-deformirovannogo sostoyaniya zheleznodorozhnogo puti na osnove volnovoy teorii rasprostraneniya napryazheniy [Model of the stress-strain state of the railway track on the basis of the straine-wave propagation theory]. Problemy Kolejnictwa, 2013, no. 159, pp. 99-111.

Transportna stratehiia Ukrainy na period do 2020 roku. № 2174-r [The transport strategy ofUkraine for the period till 2020 year. No. 21–74–r]. Available at: http://zakon1.rada.gov.ua/laws/show/2174-2010-%D1%80 (Accessed 17 February 2015).

Frishman M.A., Khokhlov I.N., Titov V.P. Zemlyanoye polotno zheleznykh dorog [Roadbed for railways]. Moscow, Transport Publ., 1972. 288 p.

Connolly D., Giannopoulos A., Forde M. Numerical modelling of ground borne vibrations from high speed rail lines on embank-ments. Soil Dynamics and Earthquake Engineering, 2013, vol. 46, pp. 13-19. doi: 10.1016/j.soildyn.2012.12.003.

Koch E., Szepesházi R. A mélykeveréses technológia vasútépítési alkalmazásának lehetőségei. Soil Dynamics and Earthquake Engineering, 2013, no. 2, pp. 9-14.

Krylov V.V., Dawson A.R., Heelis M.E., Collop A.C. Rail movement and ground waves caused by high-speed trains approaching track-soil critical velocities. Proc. of The Institution of Mechanical Engineers Part F-journal of Rail and Rapid Transit, 2000, vol. 214, no. 2, pp. 107-116. doi: 10.1243/0954409001531379.

Kouroussis G., Van Parys L., Conti C., Verlinden O. Using three-dimensional finite element analysis in time domain to model railway–induced ground vi-brations. Advances in Engineering Software, 2014, vol. 70, pp. 63–76. doi: 10.1016/j.advengsoft.2014.01.005.

Woldringh R.F., New B.M. Embankment design for high speed trains on soft soils. Proc. of the 12th Europ. Conf. on Soil Mechanics and Geotechnical Engineering (7.06-10.06.1999). Amsterdam, 1999, vol. 3, pp. 1703-1712.