Evaluation method of fatigue strength for carbody of high-speed train under influence of aerodynamic loads

LU Yao-hui; FENG Zhen; CHEN Tian-li; CENG Jing; WU Ping-bo; PAN J

Volume 14 Issue 6

Turn off MathJax

Article Contents

Article Navigation > Journal of Traffic and Transportation Engineering > 2014 > 14(6): 44-50

Next Previous

LU Yao-hui, FENG Zhen, CHEN Tian-li, CENG Jing, WU Ping-bo, PAN J. Evaluation method of fatigue strength for carbody of high-speed train under influence of aerodynamic loads[J]. Journal of Traffic and Transportation Engineering, 2014, 14(6): 44-50.

Citation:

LU Yao-hui, FENG Zhen, CHEN Tian-li, CENG Jing, WU Ping-bo, PAN J. Evaluation method of fatigue strength for carbody of high-speed train under influence of aerodynamic loads[J]. Journal of Traffic and Transportation Engineering, 2014, 14(6): 44-50.

Citation:

LU Yao-hui, FENG Zhen, CHEN Tian-li, CENG Jing, WU Ping-bo, PAN J. Evaluation method of fatigue strength for carbody of high-speed train under influence of aerodynamic loads[J]. Journal of Traffic and Transportation Engineering, 2014, 14(6): 44-50.

PDF( 857 KB)

Evaluation method of fatigue strength for carbody of high-speed train under influence of aerodynamic loads

1.
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2.
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
3.
Department of Mechanical Engineering, University of Michigan, Ann Arbor 48109, Michigan, USA

More Information

Author Bio:
LU Yao-hui (1973-), male, associate professor, PhD, +86-28-87634572, yhlu2000@swjtu.edu.cn
Received Date: 2014-07-13
Publish Date: 2014-12-25

Abstract

Abstract

The design requirements of aerodynamic loads in domestic and overseas carbody design standards were compared.The transient pressure waves of carbody sidewall were analyzed when trains passing by each other.The transient pressures were changed into the aerodynamic loads by using time integration method.Based on the code BS EN 12663-1—2010, the fatigue load conditions combined with aerodynamic loads were defined.Taking a head car of EMUs (electric multiple units) as research object, the finite element model of carbody was established.The fatigue characteristic of carbody was analyzed by using the post-processing program based on Goodman curves of carbody fatigue strength.Computation result shows that under considering aerodynamic load conditions, the high-stress amplitudes mostly appear at the door's corners and the window's corners of carbody sidewall, while the high-stress amplitudes mostly appear on underframe without considering aerodynamic loads.Under the fatigue load conditions, themaximum stress amplitude is 33.63 MPa and the fatigue strength safety factor is 2.26 at the corners, while the stress amplitudes are smaller than 10.00 MPa and the safety factors are larger than 10.00 on the underframe.The maximum Von-Mises stress of sidewall is 85.31 MPa with considering aerodynamic loads, and increases by 25.14% compared with 68.17 MPa under only considering vertical loads, so the aerodynamic loads have larger influence on sidewalls and easily result in their fatigue failure.In the carbody design of high-speed train, the fatigue strength of carbody should be evaluated by considering aerodynamic loads.
- high-speed train,
- carbody,
- fatigue strength,
- aerodynamic load,
- Goodman curve,
- finite element analysis

FullText(HTML)

References(21)

References

[1]	RAGHUNATHANA R S, KIM H D, SETOGUCHI T. Aerodynamics of high-speed railway train[J]. Progress in Aerospace Sciences, 2002, 38 (6/7): 469-514. https://www.sciencedirect.com/science/article/pii/S0376042102000295
[2]	LI Xue-bing, HOU Chuan-lun, ZHANG Shu-guang, et al. Flow-induced vibration of high-speed trains in passing events[J]. Journal of Vibration and Shock, 2009, 28 (7): 81-84, 94, 214. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ200907019.htm
[3]	FUJII K, OGAWA T. Aerodynamics of high speed trains passing by each other[J]. Computer and Fluids, 1995, 24 (8): 897-908. doi: 10.1016/0045-7930(95)00024-7
[4]	XIONG Xiao-hui, LIANG Xi-feng. Analysis of air pressure pulses in meeting of CRH2EMU trains[J]. Journal of the China Railway Society, 2009, 31 (6): 15-20. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-TDXB200906004.htm
[5]	TIAN Hong-qi, HE De-xin. 3-D numerical calculation of the air pressure pulse from two trains passing by each other[J]. Journal of the China Railway Society, 2001, 23 (3): 18-22. (in Chinese). doi: 10.3321/j.issn:1001-8360.2001.03.004
[6]	ZHOU Dan, TIAN Hong-qi, ZHANG Jian, et al. Pressure transients induced by a high-speed train passing through a station[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2014, 135: 1-9. doi: 10.1016/j.jweia.2014.09.006
[7]	YAO Shuan-bao, GUO Di-long, SUN Zhen-xu, et al. Optimization design for aerodynamic elements of high speed trains[J]. Computers and Fluids, 2014, 95: 56-73. doi: 10.1016/j.compfluid.2014.02.018
[8]	JEON K W, SHINB K B, KIM J S. A study on fatigue life and strength of a GFRP composite bogie frame for urban subway trains[J]. Procedia Engineering, 2011, 10: 2405-2410. doi: 10.1016/j.proeng.2011.04.396
[9]	ZHANG Wei-hua, WU Ping-bo, WU Xue-jie, et al. An investigation into structural failures of Chinese high-speed trains[J]. Engineering Failure Analysis, 2006, 13 (3): 427-441. doi: 10.1016/j.engfailanal.2004.12.037
[10]	WU Dan, SHANG Yue-jin, WANG Hong, et al. Comparison and analysis of the calculation methods for the car-body strength of high-speed train[J]. Railway Locomotive and Car, 2012, 32 (1): 6-9. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-TDJC201201005.htm
[11]	MIAO Bing-rong, ZHANG Li-min, ZHANG Wei-hua, et al. High-speed train carbody structure fatigue simulation based on dynamic characteristics of the overall vehicle[J]. Journal of the China Railway Society, 2010, 32 (6): 101-108. (in Chinese). doi: 10.3969/j.issn.1001-8360.2010.06.017
[12]	XIU Rui-xian, XIAO Shou-ne, YANG Guang-wu, et al. The analysis of random vibration fatigue life of spot welding passenger car-body based on PSD method[J]. Machinery, 2013, 40 (8): 27-31. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-MECH201308008.htm
[13]	WANG Li-hang, FANG Ji, MA Ji-jun. Design principle and new method of fatigue life prediction for aluminum-alloy carbody[J]. Journal of Dalian Jiaotong University, 2010, 31 (3): 9-11. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-DLTD201003002.htm
[14]	YU Meng-ge, ZHANG Ji-ye, ZHANG Wei-hua. Running attitudes of car body and wheelset for high-speed train under cross wind[J]. Journal of Traffic and Transportation Engineering, 2011, 11 (4): 48-55. (in Chinese). http://transport.chd.edu.cn/article/id/201104008
[15]	YU Si-jun. Study of carbody fatigue strength of high-speed train under aerodynamic load[D]. Chengdu: Southwest Jiaotong University, 2011. (in Chinese).
[16]	JUN H K, JUNG H S, LEE D H, et al. Fatigue crack evaluation on the underframe of EMU carbody[J]. Procedia Engineering, 2010, 2: 893-900. https://www.sciencedirect.com/science/article/pii/S1877705810000974
[17]	KIM J S, JEONG J C, LEE S J. Numerical and experimental studies on the deformational behavior a composite train carbody of the Korean tilting train[J]. Composite Structures, 2007, 81 (2): 168-175. https://www.sciencedirect.com/science/article/pii/S0263822306003084
[18]	WU Hui-chao, WU Ping-bo, ZENG Jing, et al. Influence of equipment under car on carbody vibration[J]. Journal of Traffic and Transportation Engineering, 2012, 12 (5): 50-56. (in Chinese). http://transport.chd.edu.cn/article/id/201205007
[19]	HE De-hua. Research of aerodynamic simulation on 350 km·h^-1 high-speed EMU[D]. Beijing: China Academy of Railway Sciences, 2011. (in Chinese).
[20]	QIU Ying-zheng. The numerical and experimental investigation on crossing air pressure pulse by passing high-speed trains[D]. Beijing: Beijing Jiaotong University, 2007. (in Chinese).
[21]	LU Yao-hui. Study on fatigue reliability of welded bogie frame for railway vehicle[D]. Chengdu: Southwest Jiaotong University, 2011. (in Chinese).