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Scientific paper ID 2742 : 2025/3
RESEARCH ON THE STRENGTH STATE OF STRUCTURES OF TOW HOOKS OF RAILWAY VEHICLES
Vanio Ralev, Dobrinka Atmadzhova Towing and shunting equipment of railway vehicles are the main and responsible parts for connecting the vehicles and transmitting tensile and compressive forces that occur during train movement or during shunting activities. Conditions are created for obtaining larger longitudinal vibrations and dynamic forces in the train set. The main element in the towing equipment is the tow hook. The article presents a calculation method for determining the strength state of unified designs of tow hooks of railway vehicles. The main designs of tow hooks for application in wagons and locomotives for 1435 mm gauge are indicated. This publication indicates the methods for calculating the fatigue strength of elements of railway vehicles, such as the unified method of UIC/ORE according to the Goodman diagram, recommended in the bulletin B12/RP17 of ERRI. The studied structures are modeled in the Solid Works software product. Loads regulated in the international documents EN 15566 and UIC 520 are adopted. The types of damage in operational conditions are considered. Different designs of tow hooks are modeled and FEM analysis is performed. The strength state of tow hook designs regulated in the international documents EN 15566 and UIC 520 and a newly designed structure are determined. It is found that the radius of the transition where the shape of the drawbar hook of the type “B” TC changes from a rectangular cross-section to a cylindrical one is 4 mm, as prescribed in the EN 15566:2016 and UIC 520 standards, and is a likely location for fatigue cracking.
железопътни возила теглично съоръжение теглични куки уморна якостrailway vehicles drawbar equipment drawbar hooks fatigue strengthVanio Ralev Dobrinka Atmadzhova BIBLIOGRAPHY [1] KARADZhOV, T., DIMITROV Zh., Vagoni, Sofiya, 1988 ( [1] КАРАДЖОВ, Т., ДИМИТРОВ Ж., Вагони, София, 1988 ) [2] PETROVIC D., RAKANOVIC R., Zeleznicka vozila Praktikum., Kraljevo, 2006 [3] PETROVIC D., ALEKSANDROV V., Jeleznicka vozila. Osnove, MF Kraljevo, 2013, ISBN 978-86-82631-66-8 p.223 [4] UIC 520 Wagons, coaches and vans - Draw gear - Standardisat ion, 2003. [5] M. POPOVIĆ, J. TANASKOVIĆ, D. GLIŠIĆ, N. RADOVIĆ, F.J. FRANKLIN, Experimental and numerical research on the failure of railway vehicles coupling links, Engineering Failure Analysis, Volume 127, 2021, ISSN 1350-6307, https://doi.org/10.1016/j.engfailanal.2021.... [6] M. POPOVIĆ, D. MOMČILOVIĆ, J. TANASKOVIĆ, A. SEDMAK, Testing of the condition and performance of coupling links from screw couplings of train, Engineering Failure Analysis, Volume 161, 2024, ISSN 1350-6307, https://doi.org/10.1016/j.engfailanal.2024 ... [7] M. POPOVIĆ, J. TANASKOVIĆ, Z. STARČEVIĆ, N. MEĐEDOVIĆ, Analysis of coupling system failures on freight trains, ACTA TECHNICA JAURINENSIS Vol. 16, №1, pp. 11-17, 2023 [8] M. POPOVIĆ, J. TANASKOVIĆ, J. STOJANOVIĆ, V. LUČANIN, Research of the draw hook failures on rail vehicles in Serbia, XXI International Scientific-expert Conference on Railways Serbia - RAILCON’24, Niš, October 10-11, 2024 [9] PENChEV Ts., ATMADZhOVA D., ”Yakost i dalgotraynost na avtomobilna i zhelezopatna tehnika” , VTU ”T. Kableshkov”, 2007 ( [9] ПЕНЧЕВ Ц., АТМАДЖОВА Д., ”Якост и дълготрайност на автомобилна и железопътна техника” , ВТУ ”Т. Каблешков”, 2007 ) [10] ERRI B 12/RP 17 QESTION B12 Wagons, April 1997 [11] ERRI B 12/RP 60, REGULATIONS FOR PROOF TESTS AND MAXIMUM PERMISSIBLE STRES, 2013 [12] EN 12663-2022 Railway applications - Structural ments of railway vehicle bodies. [13] EN 15566:2016 Railway applications - Railway rolling stock - Draw gear and screw coupling [14] ERRI B 51/RP 27:1995-07-01, Buffering and Draw gear — Design and testing of new draw gear for wagons. [15] ERRI В12/RP17 (80) version B using Goodman diagrams. Results are available as DoU, 2001 [16] UIC 826, Technical specification for the supply of screw couplings for tractive and trailing stock [17] DRAW GEAR, MING do - production, engineering, forging and machining for railway, agricultural, mining and hydraulic industry, https://mingbgd.com/en/products/draw-gear/ [18] SOLID WORKS 2010 [19] KATALOG na vagonen zavod TRANSVAGON – Burgas, 2025 ( [19] КАТАЛОГ на вагонен завод ТРАНСВАГОН – Бургас, 2025 ) |
