|Table of Contents|

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

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年06期
Page:
44-50
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Evaluation method of fatigue strength for carbody of high-speed train under influence of aerodynamic loads
Author(s):
LU Yao-hui1;  FENG Zhen1;  CHEN Tian-li2;  ZENG Jing2;  WU Ping-bo2;  PAN J3
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
Keywords:
high-speed train;  carbody;  fatigue strength;  aerodynamic load;  Goodman curve;  finite element analysis
PACS:
U270.12
DOI:
-
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, the maximum 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. 4 tabs, 9 figs, 21 refs.

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.
[2] 李雪冰,侯传伦,张曙光,等.高速列车交会时的风致振动研究[J].振动与冲击,2009,28(7):81-84,94,214.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)
[3] FUJII K, OGAWA T. Aerodynamics of high speed trains passing by each other[J]. Computer and Fluids, 1995, 24(8): 897-908.
[4] 熊小慧,梁习锋.CRH2型动车组列车交会空气压力波试验分析[J].铁道学报,2009,31(6):15-20.XIONG Xiao-hui, LIANG Xi-feng. Analysis of air pressure pulses in meeting of CRH2 EMU trains[J]. Journal of the China Railway Society, 2009, 31(6): 15-20.(in Chinese)
[5] 田红旗,贺德馨.列车交会压力波三维数值的计算[J].铁道学报,2001,23(3):18-22.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)
[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.
[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.
[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.
[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.
[10] 吴 丹,商跃进,王 红,等.高速列车车体强度计算方法对比分析[J].铁道机车车辆,2012,32(1):6-9.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)
[11] 缪炳荣,张立民,张卫华,等.考虑整车动力学特性的高速列车车体结构疲劳仿真[J].铁道学报,2010,32(6):101-108.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)
[12] 修瑞仙,肖守讷,阳光武,等.基于PSD方法的点焊轨道客车车体随机振动疲劳寿命分析[J].机械,2013,40(8):27-31.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)
[13] 王立航,方 吉,马纪军.铝合金车体疲劳寿命预测新方法及其应用[J].大连交通大学学报,2010,31(3):9-11.WANG Li-hang, FANG Ji, MA Ji-jun. Design principle and new method of fatigue life prediction for aluminum-alloy car-body[J]. Journal of Dalian Jiaotong University, 2010, 31(3): 9-11.(in Chinese)
[14] 于梦阁,张继业,张卫华.侧风下高速列车车体与轮对的运行姿态[J].交通运输工程学报,2011,11(4):48-55.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)
[15] 余思均.高速列车气动载荷车体疲劳强度研究[D].成都:西南交通大学,2011.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.
[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.
[18] 吴会超,邬平波,曾 京,等.车下设备对车体振动的影响[J].交通运输工程学报,2012,12(5):50-56.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)
[19] 何德华.350 km·h-1高速动车组空气动力学仿真研究[D].北京:中国铁道科学研究院,2011.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] 邱英政.高速列车交会压力波数值模拟计算与测试研究[D].北京:北京交通大学,2007.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] 卢耀辉.铁道客车转向架焊接构架疲劳可靠性研究[D].成都:西南交通大学,2011.LU Yao-hui. Study on fatigue reliability of welded bogie frame for railway vehicle[D]. Chengdu: Southwest Jiaotong University, 2011.(in Chinese)

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Last Update: 2014-12-20