Eng
Ukr
Rus
Print
2020 №03 (01) DOI of Article
10.37434/tpwj2020.03.02
2020 №03 (03)

The Paton Welding Journal 2020 #03
TPWJ, 2020, #3, 13-18 pages
 
Development of welded structure of side frame of freight car bogie of increased reliability

Authors
L.M. Lobanov, O.V. Makhnenko, V.V. Knysh, S.A. Solovej and V.I. Pavlovskyi
E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
The accidents occurring on railway track of 1520 mm are often associated with the fracture of cast load-carrying elements of three-element freight car bogies. The level of quality and endurance of such bogie elements as side frame and bogie bolster, which are traditionally manufactured by casting technology, are insufficient, so it is advisable to use welding technology to manufacture the mentioned parts of sheet rolled metal in order to increase the fatigue resistance characteristics. The development of a new all-welded structure of side frame of a three-element freight car bogie with an axial load of 23.5 ts was carried out on the basis of widespread use of mathematical modelling to determine the stress-strain state of welded elements of the bogie under the action of a regulated range of loads and to evaluate the strength according to the valid standards and modem global approaches. The technology of assembly and welding, as well as the appropriate specialized equipment for manufacture of a developed design of welded side frame were created. Two test specimens were manufactured and accelerated fatigue tests were carried out, the results of which showed a significant increase in endurance and vitality under operational cyclic loads as compared to designs of existing cast side frames. Taking into account high values of reliability, availability and manufacturability, ability of a significant reduction in unsprung weight and increase in dimensional accuracy, the welded structure of the side frame of a three-element freight car bogie is very promising for its implementation on railway track of 1520 mm. 9 ref., 2 Tables, 6 Figures.
Keywords: freight car bogie, side frame, welded structure, technology of production, fatigue resistance, life, vitality, mathematical modelling, calculation, fatigue testing

Received 11.02.2020

References

1. Budyukin, a.M., Kondratenko, v.g., Pogudin, v.g. (2014) analysis of failure causes of side frames of car bogies during their operation on electrified tracks. Bull. Rez. Nauchn. Issledov. PGUPS, 1, 177–181 [in russian].
2. Zaripov, r.yu. (2015) On problem of rupture of side frames of railway cars and means of its solution. Nauka i Tekhnika Kazakhstana, 3–4, 28–33 [in russian].
3. Pastukhov, i.F., Pastukhov, M.i. (2012) On effect of cast defects on fatigue resistance of cast parts. vestnik Gomelskogo GTU, 3, 11–18 [in russian].
4. Makhnenko, O.V., Saprykina, G.Yu., Mirzov, I.V., Pustovoj, A.D. (2014) Prospects for development of load-carrying elements of freight car bogie. The Paton Welding J., 3, 33-38. https://doi.org/10.15407/tpwj2014.03.06
5. Paton, B.E., Pidluzhny, v.E., Lobanov, L.M., Makhnenko, O.v. et al. (2015) Welded bogie side frame of railway freight car. Ukraine Pat. 95960, int. cl. B61F 5/52 (2006.01) [in Ukrainian].
6. (1995) Norms for calculation and design of railway cars of MPS of 1520 mm track (non-self-propelled). Moscow, gosNiiv–vNiiZhT [in russian].
7. Recommendations for fatigue design of welded joints and components. iiW Doc. Xiii-1965k14-03/Xv-1127k14-03. Update 2006-07-10.
8. Boronenko, yu.P., Orlova, a.M., rudakova, E.a. (2005) Design of running gears: Manual. Pt 2: Design of frames of two-axle bogies of freight cars. st.-Petersburg, PgUPs [in russian].
9. (2010) Bogie bolsters and side frames of cast two-axle bogies of freight cars of 1520 mm track, fatigue testing procedure. Moscow, vNiiZhT–Nii vagonostroeniya [in russian].
>