|Table of Contents|

Solving method of fatigue parameters of vehicle structures based on projection in spherical direction cosine group(PDF)

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

Issue:
2016年02期
Page:
64-71,81
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Solving method of fatigue parameters of vehicle structures based on projection in spherical direction cosine group
Author(s):
YANG Bing;  LIAO Zhen;  MA Bai-quan;  XIAO Shou-ne;  YANG Guang-wu;  ZHU Tao
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
Keywords:
vehicle engineering;  fatigue strength assessment;  projection method;  direction cosine group;  tension/compression property;  welded frame;  axle box body
PACS:
U270.12
DOI:
-
Abstract:
In the traditional projection method, the maximum principal stress was assumed to be the maximum tensile stress in advance, and the tension/compression properties of principal stress were not taken into account in the projection process. To improve the above inadequacies, a solving method of fatigue parameters based on the projection in spherical direction cosine group was proposed. A series of direction cosines around the points in structure were built, and the direction of the maximum tensile stress under multiple loading conditions was searched. In the process of calculating the maximum stress and the minimum stress, the directions of principal stress were retained, hence, the original tension/compression properties of stresses were preserved. The fatigue strength assessments of welded frame of three-axle bogie and the axle box body of vehicle were analyzed by using both the traditional projection method and the proposed solving method respectively. Analysis result indicates that for the welded frame, the maximum stress of node 254570 obtained by the proposed method is 19.4% higher than the value of the traditional projection method. The large differences of the minimum stresses deduced from two methods exist at 27.8% of nodes, the opposite results even exist in signs of the minimum stresses at several nodes. The revised equivalent stress amplitudes obtained by the traditional projection method are at least 1 MPa lower than the values obtained by the proposed method at 12% of nodes, and the values were even 34.73% lower at individual node. Therefore, the subsequent fatigue strength assessment based on such fatigue parameters is unsafe. For the axle box body, the symmetrical cyclic stress amplitudes obtained by the traditional projection method deviate from the actual situation. The values of some nodes are even 45.32% lower or 51.23% higher than the values calculated by the proposed method, which will lead to dangerous or over-conservative results in fatigue analysis. The direction of the maximum tensile stress is determined, and the tension/compression properties of principal stresses are considered in the present method, therefore, the proposed method is more rational and credible in fatigue analysis compared with the traditional projection method. 4 tabs, 9 figs, 22 refs.

References:

[1] 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.
[2] JEON K W, SHIN 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.
[3] 安 琪,李 芾,傅茂海.牵引电机振动对构架疲劳强度的影响[J].西南交通大学学报,2010,45(2):209-212.AN Qi, LI Fu, FU Mao-hai. Influences of traction motor vibration on bogie frame fatigue strength[J]. Journal of Southwest Jiaotong University, 2010, 45(2): 209-212.(in Chinese)
[4] 卢耀辉,冯 振,陈天利,等.气动载荷影响下的高速列车车体疲劳强度评估方法[J].交通运输工程学报,2014,14(6):44-50.LU Yao-hui, FENG Zhen, CHEN Tian-li, et al. 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.(in Chinese)
[5] 秦国栋,刘志明,崔二光,等.提速转向架焊接构架疲劳寿命的实用分析方法[J].中国铁道科学,2004,25(1):46-51.QIN Guo-dong, LIU Zhi-ming, CUI Er-guang, et al. Practical analysis method for fatigue life of welded frame of speed-up bogie[J]. China Railway Science, 2004, 25(1): 46-51.(in Chinese).
[6] 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)
[7] 刘 旭,张开林,姚 远,等.缺口应力法在机车焊接构架疲劳分析中的应用[J].铁道学报,2015,37(1):24-29.LIU Xu, ZHANG Kai-lin, YAO Yuan, et al. Application of notch stress method in fatigue analysis of locomotive welded frame[J]. Journal of the China Railway Society, 2015, 37(1): 24-29.(in Chinese)
[8] 张澎湃,刘金朝,张 斌,等.基于主应力法和修正的Crossland疲劳准则的动车组车轮疲劳强度评定方法[J].中国铁道科学,2014,35(2):52-57.ZHANG Peng-pai, LIU Jin-zhao, ZHANG Bin, et al. Assessment method for fatigue strength of EMU wheel based on principal stress method and amendatory Crossland method[J]. China Railway Science, 2014, 35(2): 52-57.(in Chinese)
[9] 李宝瑞,赵永翔.基于UIC标准的转向架构架强度评估[J].机械,2012,39(10):9-12.LI Bao-rui, ZHAO Yong-xiang. Strength assessment for bogie frame based on UIC standard[J]. Machinery, 2012, 39(10): 9-12.(in Chinese)
[10] 刘会英,张澎湃,米彩盈.铁道车辆车轮强度设计方法探讨[J].铁道学报,2007,29(1):102-108.LIU Hui-ying, ZHANG Peng-pai, MI Cai-ying. Research of design method of rolling stock wheel strengths[J]. Journal of the China Railway Society, 2007, 29(1): 102-108.(in Chinese)
[11] 肖守讷,杨 超,阳光武.一种新的焊接构架疲劳分析方法[J].西南交通大学学报,2013,48(2):199-204.XIAO Shou-ne, YANG Chao, YANG Guang-wu. A novel fatigue analysis method of welded frames[J]. Journal of Southwest Jiaotong University, 2013, 48(2): 199-204.(in Chinese)
[12] CROSSLAND B. Effect of large hydrostatic pressure on the torsional fatigue strength of an alloy steel[C]∥Institution of Mechanical Engineers. Proceedings of the International Conference on Fatigue of Metals. London: Institution of Mechanical Engineers, 1956: 138-149.
[13] European Rail Research Institute. Programme of tests to be carried out on wagons with steel underframe and body structure(suitable for being fitted with the automatic buffing and draw coupler)and on their cast seel frame bogies[R]. Utrecht: European Rail Research Institute, 1997.
[14] JEON K W, SHIN K B, KIM J S. A study on evaluation of fatigue strength of a GFRP composite bogie frame for urban subway vehicles[J]. Advanced Composite Materials, 2013, 22(4): 213-225.
[15] DEMILLY F, OWEN C, BRUNEL J F, et al. FEA and methodology of design optimization of wheel-rail interface for heavy haul wagon wheels[C]∥International Heavy Haul Association. Proceedings of the 9th International Heavy Haul Conference. Beijing: China Railway Publishing House, 2009: 426-432.
[16] SUN Shu-lei, ZHOU Zhang-yi, LI Fu, et al. Fatigue strength analysis of 160 km/h high speed freight car wheel web[C]∥PENG Qi-yuan, KELVIN C P, QIU Yan-jun, et al. Proceedings of the 3rd International Conference on Transportation Engineering. Reston: ASCE, 2011: 2550-2555.
[17] KIM C S, KANG G H, JANG S H. A study on the development of the Korean gauge-adjustable wheelset system for freight train[J]. Advanced Materials Research, 2011, 199-200: 337-340.
[18] 卢 杰,米彩盈,刘亚军,等.基于ANSYS的车轮参数化设计与疲劳后处理研究[J].机车电传动,2013(6):32-35.LU Jie, MI Cai-ying, LIU Ya-jun, et al. Research on wheel parametric design based on ANSYS and fatigue post-processing system[J]. Electric Drive for Locomotives, 2013(6): 32-35.(in Chinese)
[19] YANG Bing, ZHAO Yong-xiang. Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel[J]. International Journal of Fatigue, 2012, 35(1): 71-78.
[20] 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(1): 893-900.
[21] 杨 冰,赵永翔.PW200转向架的疲劳可靠性分析[J].中国机械工程,2005,16(13):1193-1197.YANG Bing, ZHAO Yong-xiang. Fatigue reliability analysis of PW200 bogie[J]. China Mechanical Engineering, 2005, 16(13): 1193-1197.(in Chinese)
[22] 肖守讷,杨 冰,曲天威,等.EN 13749标准在机车轴箱体强度分析中的推演应用[J].机车电传动,2013(2):38-41.XIAO Shou-ne,YANG Bing, QU Tian-wei, et al. Extrapolation and application of standard EN 13749 in strength analysis of locomotive axle-box body[J]. Electric Drive for Locomotives, 2013(2): 38-41.(in Chinese)

Memo

Memo:
-
Last Update: 2016-04-20