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Abstract: The dynamic model of a high-speed electric multiple unit (EMU) is established based on the theory of rigid-flexible coupling multi-body system dynamics. Depending on the actual operating conditions of the vehicle, there are a variety of conditions of car body load-time history. We assess ineffective amplitude omission, load spectrum extrapolation, and extreme determination through the car body load-time history, and then obtain the car body fatigue load block spectrum. Finally, we perform a fatigue strength test on the whole car body on a car body fatigue test bench. It is shown that the accelerations of the three directions of the vehicle car body increase with increasing speed. When the train passes a curve, the lateral acceleration average becomes greater. There is also an increase in the car body accelerations in three directions when the train goes through a turnout or twisted line. Under the condition of a failed spring, the vertical acceleration of the car body is obviously increased. Anti-yaw damper failure will cause a significant increase in vehicle lateral acceleration. The failure of lateral and vertical dampers on the second suspension causes an insignificant acceleration increase in three directions. The car body acceleration increases the wear-type profile relative to the original profile in various working and speed level conditions a little. The influence on the damage of vehicle car body under various working conditions is predicted according to the obtained load spectrum.

基于动力学仿真载荷谱的车体疲劳损伤评估及试验技术研究

[1]AAR (Association of American Railroad), 1999. Locomotive and Rolling Stock Standard Manual. AAR, Washington, USA.

[2]BSI (British Standards Institution), 2014. Guide to Fatigue Design and Assessment of Steel Products, BS 7608:2014. BSI, London, UK.

[3]Gongjiang MS, 2003. The strength of carbody for Shinkansen cars and safety evaluation. Foreign Rolling Stock, 40(6):12-16 (in Chinese).

[4]Gou G, Zhang M, Chen H, et al., 2015. Effect of humidity on porosity, microstructure, and fatigue strength of A7N01S-T5 aluminum alloy welded joints in high-speed trains. Materials & Design, 85:309-317.

[5]Gutiérrez-Carvajal RE, Betancur GR, Barbosa J, et al., 2018. Full scale fatigue test performed to the bolster beam of a railway vehicle. International Journal on Interactive Design and Manufacturing (IJIDeM), 12(1):253-261.

[6]Hou B, 2016. The Load Spectrum Study on High-speed EMU Body. MS Thesis, Southwest Jiaotong University, Chengdu, China (in Chinese).

[7]IIW (International Institute of Welding), 2016. Recommendations for Fatigue Design of Welded Joints and Components, IIW-2259-15:2016. IIW, Wilhelmshaven, Germany.

[8]Ju YZ, 2013. High-speed EMU Aluminum Alloy Weld Fatigue Life Prediction of Vehicle. MS Thesis, Dalian Jiaotong University, Dalian, China (in Chinese).

[9]Jun HK, Jung HS, Lee DH, et al., 2010. Fatigue crack evaluation on the underframe of EMU carbody. Procedia Engineering, 2(1):893-900.

[10]Li FS, 2018. Research on Vibration and Fatigue of Carbody for EMU under Service Environment. PhD Thesis, Southwest Jiaotong University, Chengdu, China (in Chinese).

[11]Li XF, 2008. Predicting Fatigue Life of Rail Vehicle Welded Structure Based on Virtual Fatigue Test. PhD Thesis, Dalian Jiaotong University, Dalian, China (in Chinese).

[12]Liu K, 2013. The Research of Ability of Anti-fatigue for Aluminum Alloy Car Body. MS Thesis, Dalian Jiaotong University, Dalian, China (in Chinese).

[13]Liu YB, 2015. Analysis on Ground Effects of High-speed Trains and the Resultant Fatigue Damage to the Equipment Bay. PhD Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[14]Lu X, 2010. Vibration Fatigue Life Analysis on Rigid-flexible Coupling of CRH3 Car Body. MS Thesis, Dalian Jiaotong University, Dalian, China (in Chinese).

[15]Lu YH, Dang LY, Zhang X, et al., 2018a. Analysis of the dynamic response and fatigue reliability of a full-scale carbody of a high-speed train. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 232(7):2006-2023.

[16]Lu YH, Zheng HY, Lu C, et al., 2018b. Analysis methods of the dynamic structural stress in a full-scale welded carbody for high-speed trains. Advances in Mechanical Engineering, 10(10):1-16.

[17]Miao BR, Zhang LM, Zhang WH, et al., 2010. High-speed train carbody structure fatigue simulation based on dynamic characteristics of the overall vehicle. Journal of the China Railway Society, 32(6):101-108 (in Chinese).

[18]Oomura K, Okuno S, Kawai S, et al., 1992. Fatigue test of an actual car body structure (1st report, the testing method and its accuracy). Transactions of the Japan Society of Mechanical Engineers Series A, 58(545):20-25 (in Japanese).

[19]Qin HF, 2017. Study on the Load Spectrum of Chinese Standard EMUs. MS Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[20]Song Y, Wu PB, Jia L, 2016. Study of the fatigue testing of a car body underframe for a high-speed train. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 230(6):1614-1625.

[21]Wang YW, 2015. The Corbel Fatigue Strength of CRH-2 EMU Based on the Measured Load. MS Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[22]Wang ZY, 2016. The Study on the Vibration Fatigue of Mono-car Body Made of Aluminum Alloy. MS Thesis, Southwest Jiaotong University, Chengdu, China (in Chinese).

[23]Wei QS, 2018. Study on Fatigue Crack Propagation of the Al Alloy Crossbeam in High Speed EMU Car Body. MS Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[24]Xie JL, Zhang Y, Xie YY, 2010. Dynamic response and fatigue strength of depressed center flat frame. Journal of Mechanical Engineering, 46(16):16-22 (in Chinese).

[25]Xue GJ, 2013. Inference and Calibration of Rail Vehicles Load Spectrum Based on Mathematical Statistics Methods. MS Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[26]Yan X, 2009. The Compile of Longitudinal Load Spectrum for Da-Qin Line 20,000-ton Heavy-load Train. MS Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[27]Yan XD, 2014. Reliability Study of High Speed Train Equipment Bay Bottom Plates. MS Thesis, Beijing Jiaotong University, Beijing, China (in Chinese).

[28]Yang GW, 2005. Simulation of Prediction of Fatigue Life for Component of Railway Vehicle. PhD Thesis, Southwest Jiaotong University, Chengdu, China (in Chinese).

[29]Yang YB, Liang XJ, Hung HH, et al., 2017. Comparative study of 2D and 2.5D responses of long underground tunnels to moving train loads. Soil Dynamics and Earthquake Engineering, 97:86-100.

[30]Zhang SG, 2008. Study on testing and establishment method for the load spectrum of bogie frame for high-speed trains. Science in China Series E: Technological Sciences, 51(12):2142-2151.

[31]Zhang SX, 2016. Load Spectrum Compiling and Life Prediction Simulation of High Speed Train Car Body Based on the Acceleration Life Test. MS Thesis, Southwest Jiaotong University, Chengdu, China (in Chinese).