Abstract
Car body fatigue reliability is a key technology for the development of railway heavy axle load freight cars. Therefore, a comprehensive test rig capable for carrying out car body fatigue test and complete car vibration test was designed and built in CRRC Qiqihar Rolling Stock Co., Ltd. (QRRS). This test rig was used to validate fatigue life of car body in accelerated fatigue test by simulating car body movement in service with input data derived from measurements in service lines. The success of such test depends on some key technologies such as collection of response signals in service line test, process of data collection, compilation of drive file for test rig, determination of test methods and evaluation of test results. A C70E-loaded general service gondola car was tested on test rig to evaluate its fatigue life with accumulated equivalent total mileage of 3.125 million kilometers. The test results indicate that this car body can survive for 25 years and meet designed life requirement. Comparison between response signals from test rig and target signals demonstrates that acceleration RMS error is less than 6%, and stress RMS error is less than 18% and fatigue accumulated damage error is less than 6%. It means that simulation accuracy of test rig has achieved the requirement. Such results demonstrate that related key technologies are applicable and suitable.
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References
Z. Odanovic, M. Ristivojevic, V. Milosevic-Mitic, Investigation into the causes of fracture in railway freight car axle. Eng. Fail. Anal. 55(5), 169–181 (2015)
K.B. Smith, E.S. Parker, D.J. Iler, Railcar service spectra generation for full-scale accelerated fatigue testing (ASTM Special Technical Publication, 2002)
M. Sobek, A. Baier, Grabowski fatigue test of a fiberglass based composite panel. Increasing the lifetime of freight wagon, in Materials Science & Engineering Conference Series (2016)
A.R. Shahani, H.M. Kashani, Assessment of equivalent initial flaw size estimation methods in fatigue life prediction using compact tension specimen tests. Eng. Fract. Mech. 99, 48–61 (2013)
S.H. Baek, S.S. Cho, W.S. Joo, Fatigue life prediction based on the rainflow cycle counting method for the end beam of a freight car bogie. Int. J. Autom. Technol. 9(1), 95–101 (2008)
X. Li, Study report on railway freight carbody fatigue life evaluation method, QRRS (2014)
Q. Zhang, Report on C70E general service gondola car body fatigue test, QRRS (2014)
Association of American Railroad, AAR Locomotive and Rolling Stock Standard Manual (Association of American Railroad, Washington, 1999)
British Standard Institute (BSI), BS7608-1993 Fatigue Design and Assessment of Steel Structures (British Standard Institute (BSI), London, 1993)
IIW Joint Working Group XIII-XV, Recommendations for Fatigue Design of Welded Joints and Components (IIW/IIS, Paris, 2003)
X Li, J Wang, Y Huang, System Development and Research on Fatigue Life Prediction of Wagon Welded Structure. China Mech. Eng. (2010) (09)
Document No. 72 of China Railway Transportation, Regulations for the Maintenance of Railway Wagons (China Railway Press, Beijing, 2002)
X. Li, W. Zhao, Weld fatigue evaluation principle and validation based on verity method. Weld. J. 31(07), 9–12 (2010)
S. Xie, Fatigue Life Analysis Report on C70E General Service Gondola Car Body Structure (Dalian Jiaotong University, Dalian, 2013), p. 2013
X. Li, Study report on railway freight carbody fatigue test method, QRRS (2014)
Q. Zhang, Railway freight carbody fatigue test specification (tentative), QRRS (2014)
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The authors gratefully acknowledge the financial support provided by the Liaoning Provincial Department of Science and Technology (Project No.: 20170520162) and the Dalian Science and Technology Bureau (Project No.: 2017RQ132).
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Li, X., Fang, J., Zhang, Q. et al. Study on Key Technology of Railway Freight Car Body Fatigue Test. J Fail. Anal. and Preven. 20, 261–269 (2020). https://doi.org/10.1007/s11668-020-00828-7
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DOI: https://doi.org/10.1007/s11668-020-00828-7