More on the Development of Rigidity Evaluation Techniques of Freight Car Structures and Their Components in the Design and on Trials. Adjustment of Design Loads
Abstract
While justifying selection of steel grades for replaceable cast parts as well as service life and interrepair run guidelines of freight cars to be operated on the JSC RZD network it is necessary to take into account its severe climatic environment. The authors highlight the appropriateness of examination of metal specimens taken from tank-car thin-walled shells being in service for as long as 10 to 20 years in order to identify loss of the shell material ductility. The specimens must be cut out at areas where shells are fixed to the tank-car frames. Within the framework of conformity validation strength assessment of welded car components shall be performed on the basis of static and impact tests in terms of the I and III regimes as in the design and calculation norms related to 1520 mm gauge railway cars of MPS-Russia (non-self-propelled ones). Exception to this applies to cars with welded solebars and a long distance between truck centers. In this case strength conformity assessment shall be based on the endurance tests results. Underframe bolster ends of freight cars intended for transportation by ferry ought to be additionally equipped with two strainers designed for loads 150 kN each. Cars with axle-load exceeding 235 kN ought to be equipped in the midpart with additional strainer on each side. In the case of bridge constructed across the Kerch Strait at a quickened pace it is necessary to consider wind loading on railway rolling stock at the level of 1,250 kPa retaining the value of 500 kph for the rest of the JSC RZD network.
About the Authors
V. S. Plotkin
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation
Russian Federation
A. M. Krasnobaev
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation
Russian Federation
T. Ye. Kon’Kova
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation
Russian Federation
О. Krasnobaev
JSC Railway Research Institute (JSC VNIIZhT)
Russian Federation
Russian Federation
References
1. Plotkin V. S., Krasnobaev A. M., Kon’kova T. E., Krasnobaev O. A. K otsenke napryazheniy v litykh detalyakh telezhek gruzovykh vagonov [The problem of stress assessment in the cast parts of freight car bogies]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2014, no. 4, pp. 20 – 24.
2. Plotkin V. S., Krasnobaev A. M., Krasnobaev O. A. K voprosu sovershenstvovaniya metodik otsenki prochnosti litykh detaley telezhek gruzovykh vagonov pri ikh proektirovanii i ispytaniyakh dlya tseli podtverzhdeniya sootvetstviya [On the improvement of strength assessment procedures of freight car bogie cast parts at the design and test stages as performed for validation purposes]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2014, no. 6, pp. 33 – 37.
3. Norms for calculation and design of cars for MR 1520 mm gauge railways (unpowered). Moscow, GosNIIV, VNIIZhT Publ., 1996. 319 p. (in Russ.).
4. Bolsters and cast side frames of bogie trucks of 1520 mm gauge railway freight cars. The technique of static strength tests. Coordinated by the Department of technical policy of JSC “Russian Railways” and the Center for technical audit of JSC “Russian Railways”. Moscow, JSC “Russian Railways”- JSC “SRI of Car-Building”, 2010. 14 p. (in Russ.).
5. Truck bolsters, cast or structural — design and testing. Standard M-202. Casting details. Adopted in 1926. Revised in 1997, 2005. Manual of standards and recommended practices. Section A. Part I. Washington, Association of American Railroads Publ., 2014. 94 p. Available at: http://www.aar.com/standards/MSRPs/MSRP-A1. pdf.
6. Truck side frames, cast steel — design and testing. Standard M-203. Casting details. Adopted in 1926. Revised in 1987, 2005. Manual of standards and recommended practices. Section A. Part I. Washington, Association of American Railroads Publ., 2014. 94 p. Available at: http://www.aar.com/standards/MSRPs/MSRP-A1. pdf.
7. Bolsters and cast side frames of bogie trucks of 1520 mm gauge railway freight cars. The technique of static strength tests. Coordinated by the Department of technical policy of JSC “Russian Railways” and the Center for technical audit of JSC “Russian Railways”. Moscow, JSC “Russian Railways”- JSC “SRI of Car-Building”, 2010. 16 p. (in Russ.).
8. Federal Law of December 27, 2002 № 184‑FZ (revised on September 28, 2010) “On Technical Regulation”. Available at: http://base.garant.ru/12129354/#friends. (in Russ.).
9. GOST 51282 – 99. Launching and technical complexes technological equipment for rocket-space complexes. Designing and test norms. Moscow, Standards Publ., 1999. 21 p.
10. Mironov N. I., Plotkin V. S. Ob uslovnosti otsenki prochnosti konstruktsiy gruzovykh vagonov po III rezhimu Norm [On conditional evaluation of structural strength of freight cars to III mode Norm]. Issledovaniya i ispytaniya konstruktsiy vagonov i ikh uzlov. Trudy VNII vagonostroeniya [Studies and tests of rail cars and components. Proceedings of the SRI of Car-Building]. 1983, no. 49, pp. 23 – 26.
11. Collins J. A. Failure of materials in mechanical design: Analysis, prediction, prevention. New York, Wiley-Interscience Publ., 1981. 672 p. (Russ. ed.: Kollinz Dzh. Povrezhdenie materialov v konstruktsiyakh: analiz, predskazanie, predotvrashchenie. Moscow, Mir Publ., 1984. 624 p.).
12. Severinova T. P. Issledovanie treshchinostoykosti staley litykh detaley telezhek gruzovykh vagonov posle dlitel’nogo perioda ekspluatatsii [Investigation of crack resistance of steel cast parts of freight cars bogies after a long period of operation]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 1999, no. 3, pp. 35 – 40.
13. Kostenko N. A. Osobennosti razrusheniya i raschet nadezhnosti litykh detaley gruzovykh vagonov, rabotayushchikh v rezhime sluchaynykh nagruzok. Dokt. tech. nauk diss. Aftoref. [Features of destruction and calculation of reliability of cast details of freight cars operating in a mode of random loads. Dr. tech. sci. diss. Synopsis]. Bryansk, Bryansk Inst. of Transport Engineering Publ., 1979.
14. Shakhov V. I. et al. Vliyanie nizkikh temperatur na nesushchuyu sposobnost’ nadressornykh balok telezhki gruzovykh vagonov [The effect of low temperatures on the bearing capacity of bolsters of truck freight cars]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 1983, no. 5, pp. 41 – 42.
15. Severinova T. P. Spektr nagruzhennosti bokovoy ramy telezhki gruzovogo vagona v ekspluatatsii [The range of loading of the bogie’s side frame of the freight car in operation]. Sbornik trudov VNIIZhT [Proceedings of VNIIZhT (Railway Research Institute)], Moscow, Transport Publ., 1992, pp. 70 – 80.
16. Freight and passenger cars. Test methods for durability and driveability. RD 24.050.37.95. Moscow, State Scientific Research Inst. of Railcars Publ., 1995. 101 p. (in Russ.).
17. Flat cars of increased length. Methods of fatigue tests. VNIIZhT, JSC “Vagony”, EC “Azovmashtest”, JSC “Mariupol Heavy Machinery Plant”. 2006. 20 p. (in Russ.).
18. Methods of fatigue testing of units terminations of pillars of 4 axle gondola cars. All-Union Cent. Res. Inst. of Railway Transport — SRI of Car-Building, 1978. 6 p. (in Russ.).
19. Plotkin V. S., Druzhinin S. S., Chentsov E. I. Issledovanie ustalostnoy prochnosti zadelok stoek 4 osnykh tsel’nometallicheskikh poluvagonov [Study of fatigue strength of racks terminations of 4 axle metal gondola cars]. Teplotekhnicheskie i energeticheskie svoystva transportnykh sredstv. Trudy Vsesoyuznogo nauchno-issledovatel’skogo instituta vagonostroeniya [Thermal and energy properties of vehicles. Proceedings of the All-Union Scientific Research Institute of Railcars], 1978, no. 35, pp. 21 – 26.
20. Kashkin A. I., Mironov N. I. Issledovanie ustalostnoy prochnosti maketnykh obraztsov i naturnykh uzlov platform, izgotovlennykh iz stali marki 10G2BD [Study of fatigue strength of prototypes and full-scale platform units made of steel 10G2BD]. Trudy Vsesoyuznogo nauchno- issledovatel’skogo instituta vagonostroeniya [Proceedings of the All-Union Scientific Research Institute of Railcars], 1980, no. 42, pp. 76 – 90.
21. Zhevtobryukh G. D. et al. Issledovanie soprotivleniya ustalosti shkvornevogo uzla universal’noy platformy. Problemy sovershenstvovaniya vagonnykh konstruktsiy i metodov ikh issledovaniya [The study of fatigue resistance of pivot assembly of universal platform. Problems of improving the car structures and methods of their study]. Sbornik nauchnykh trudov Vsesoyuznogo nauchno-issledovatel’skogo instituta vagonostroeniya [Collection of scientific papers of All-Union Scientific Research Institute of Railcars], 1984, no. 53, pp. 63 – 72.
22. Iorsh E. T., Plotkin V. S., Radzikhovskiy A. A. Issledovanie ustalostnoy prochnosti nadressornykh balok telezhek gruzovykh vagonov pri nagruzhenii, imitiruyushchem bokovuyu perevalku kuzova [The study of the fatigue strength of bolsters of freight car trucks at loading, simulating a lateral body handling]. Sbornik nauchnykh trudov Vsesoyuznogo nauchno-issledovatel’skogo instituta vagonostroeniya [Collection of scientific papers of All-Union Scientific Research Institute of Railcars], 1983, no. 49, pp. 27 – 33.
23. Radzikhovskiy A. A. et al. Povyshenie nadezhnosti litykh detaley telezhek gruzovykh vagonov [Improving the reliability of cast details of freight cars bogies]. Sbornik nauchnykh trudov Vsesoyuznogo nauchno- issledovatel’skogo instituta vagonostroeniya [Collection of scientific papers of All-Union Scientific Research Institute of Railcars], 1982, no. 46, pp. 91 – 97.
24. Kharitonov B. V. Puti snizheniya povrezhdaemosti bokovykh ram telezhek gruzovykh vagonov na sortirovochnykh gorkakh. Kand. tekh. nauk. diss. Avtoref. [Ways to reduce the side frames damage to freight car bogies on hump yards. Cand. tech. sci. diss. Synopsis]. Moscow, VNIIZhT, RF Ministry of Railways, 1999. 25 p.
25. Iorsh E. T., Plotkin V. S., Radzikhovskiy A. A., Bondarev S. V., Miroshkin M. A., Ol’gard L. Sh., Trubachev Yu. A. A device for loading by variable effort of jaw guide of pedestal opening of side bogie frame of a railway vehicle. Author’s certificate 1441229 (USSR). Statement 0206.86 № 4094042/27 – 11. Published on November 30, 1988. (in Russ.).
26. Orlova A. M. Aprobatsiya rezhimov resursnykh ispytaniy bokovykh ram telezhki modeli 18-9855 na stende prostranstvennogo nagruzheniya [The approbation of endurance test modes of side frames of 18-9855 model bogie on the spatial loading stand]. Vagony i vagonnoe khozyaystvo, 2014, no. 4 (40), pp. 36 – 37.
27. Methods of research and evaluation of fatigue strength of car structures and their components. Moscow, SRI of Car-Building — Cent. Res. Inst. of Railway Transport of the RF Ministry of Railways, 1968. 35 p. (in Russ.).
28. Viznyak R. I., Lovskaya A. A. Utochnenie velichin usiliy, kotorye deystvuyut na kuzova vagonov pri ikh perevozke zheleznodorozhnymi paromami [Refinement of forces acting on car bodies in the course of their transportation by ferry-boats]. Vestnik VNIIZhT [Vestnik of the Railway Research Institute], 2013, no. 2, pp. 20 – 27.
29. Construction rules and regulations 2.01.07 – 85. Pressures and impacts. Moscow, The Central Institute of Standard Design of the USSR State Construction Committee, 1986. 36 p. (in Russ.).
30. Kazakevich M. I. Aerodinamika mostov [Aerodynamics of bridges]. Moscow, Transport Publ., 1987. 240 p.
Review
For citations:
Plotkin V.S., Krasnobaev A.M., Kon’Kova T.Ye., Krasnobaev More on the Development of Rigidity Evaluation Techniques of Freight Car Structures and Their Components in the Design and on Trials. Adjustment of Design Loads. RUSSIAN RAILWAY SCIENCE JOURNAL. 2015;(6):50-57. (In Russ.)
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