employee
Moscow, Moscow, Russian Federation
graduate student
Moscow, Moscow, Russian Federation
employee
Moscow, Moscow, Russian Federation
employee
Moscow, Moscow, Russian Federation
UDK 629.4.014 Технические характеристики подвижного состава
BBK 392 Железнодорожный транспорт
Improving the dynamic qualities, traffic safety and increasing the inter-repair mileage of cars are urgent tasks of car-building industry. The most dangerous loads acting on the car are longitudinal loads during emergency driving modes, to reduce which inter-car shock absorbers (absorbing devices) are provided; their effectiveness must be ensured throughout the whole car life. The performance of polymer car absorbing devices depends primarily on the durability of the polymer, which is a kinetically activated process accelerated by repeated deformations and elevated temperature. The mechanism of the material ageing process depends on the structure of the material. Based on experimental laboratory studies and comparative field tests, ageing of elastomers of different classes have been identified, the dependences of the power characteristics of R-5P absorbing apparatus with two types of solid elastomer (based on rubber and a mixture of elastic thermoplastic with polyvinyl chloride plastic) have been constructed at normal and low temperatures, as well as after 6 years of operation. Recommendations are given to increase the resistance to crystallization and to ageing of polymer elements of absorbing devices. It is advisable to use the characteristics obtained in the paper when modeling the operation of absorbing devices with a solid elastomer, taking into account the operating time.
shock absorber, shock, absorbing devise, mechanism, ageing, polymer, temperature, material, characteristic
1. Federal Law No. 184-FZ on Technical Regulation. 2002 Dec 27 [Internet]. SPS ConsultantPlus. Available from: http://www.pravo.gov.ru https://www.consultant.ru/document/cons_doc_LAW_40241/
2. TR CU 001/2011 Technical Regulations of the Customs Union. On the safety of railway rolling stock [Internet]. 2011 Feb 08. Available from: www.tsouz.ru
3. Order of the Ministry of Transport of the Russian Federation No. 250. On approval of the rules of technical operation of railways of the Russian Federation [Internet]. 2022 Jun 23. Available from: https://base .garant.ru/405042985/
4. Boldyrev AP. Scientific bases of improvement of absorbing devices of automatic coupling [dissertation]. [Bryansk (RF)]; 2006.
5. Boldyrev AP, Govorov VV. Theoretical and experimental studies of polymer elements of shock absorbers of auto coupling. Bulletin of Bryansk State Technical University. 2011;2(30):42-46
6. Vasiliev AS, Keglin BG, Boldyrev AP, Shlyushenkov AP. Development and research of a friction shock absorber with an elastic spacer assembly. Bulletin of Bryansk State Technical University. 2012;1:25-31.
7. Keglin BG, Kravtsov SA, Boldyrev AP. Development of mathematical models and calculation of characteristics of polymer shock absorbers. Bulletin of Bryansk State Technical University. 2013;4(40):18-26.
8. Kravtsov SA, Boldyrev AP, Lozbinev FYu. Computational and experimental evaluation of the characteristics of polymer elements. Proceedings of Petersburg Transport University. 2023;20(1):7-16.
9. Kravtsov SA. Improvement of calculation methods and increasing the efficiency of absorbing devices with polymer elements [dissertation]. [Bryansk (RF)]; 2023.
10. Kurzina EG. Improvement of damping elastic polymer elements of the running gear of a freight car [dissertation]. [Moscow (RF)]; 2020. 11. Kurzina EG, Kolmakov AG, Filippov VN, Semak AV, Kurzina AM. Damping composites made from materials with different elastic-hysteresis properties, inrended for sandwich shock absorbers of railway vehicles. Materialovedenie. 2020;1:25-32.
11. Zhurkov SN, Kuksenko VS. Micromechanics of polymer destruction. Mechanics of Composite Materials. 1974;5:792.
12. Zhurkov SN, Regel VR, Sanfirova TP. The correlation between the temperature-time dependence of strength and the nature of thermal destruction of polymers. Polymer Science. 1964;6(6):1092-1097.
13. Bartenev GM, Razumovskaya IV. On the theory of time dependence of the strength of solid polymers. Physics of the Solid State. 1964;6(3):657-661
14. Bartenev GM, Shut NI, Duschenko VP, Lazorenko MV. Relaxation transition and segmental mobility in the interphase layer of a filled elastomer. Polymer Science. 1986;2(86):463.
15. Bartenev, G.M. Relaksacionnyy perehod i segmental'naya podvizhnost' v mezhfaznom sloe napolnennogo elastomera // G.M. Bartenev, N.I. Shut, V.P. Duschenko, M.V. Lazorenko // Vysokomolekulyarnye soedineniya. Seriya A. 1986. T.2(86). - №3. - S.463.
16. Krasyukov NF. Modeling of the loading of a locomotive structure in a frontal collision with an obstacle on a railway track [dissertation]. [Moscow (RF)]; 2020.
