Fatigue Reliability of Contact Wire
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摘要: 根据接触悬挂系统中的接触线振动方程,推导了接触线应力的均值和方差的计算公式.综合考虑了接触线应力集中系数、尺寸系数、表面质量系数和材料疲劳强度的影响,得到了接触线疲劳极限的统计特征.应用数理统计原理建立了接触线疲劳可靠性分析的数学模型.分析结果表明,接触导线线质、张力和刚度以及列车运行速度、波动传播速度和抬升力是影响导线疲劳可靠性的主要因素.Abstract: Vibration equations of contact wires were used to derive the formulae for calculation of mean and standard deviations of stresses.Statistical characteristic of fatigue strength of contact wires was obtained by comprehensively considering such coefficients as stress concentration,size and surface quality.A mathematic model for fatigue reliability of contact wires was presented based on statistical principle.Analyses results show that the materials,tension and rigidity of wires,speed of trains,wave speed,and lift forces are primary factors that affect fatigue life of contact wires.
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Key words:
- fatigue /
- reliability /
- contact wire /
- electrified railway
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GRAY R T,LEVY S.Effect of design changes in railway catenary systems on power collection at high speed[J].Transaction of the ASME Journal of Engineering for Industry,1998,18(90):288-291.[2] 黄崇祺.轮轨高速电气化铁路接触网用接触线的研究[J].中国铁道科学,2001,22(1):2-5.HUANG Chongqi.On contact wire line used in catenary of high speed wheel-rail electrified railway[J].China Railway Science,2001,22(1):2-5.[3] 谢洪和.电力机车走行下接触线应力计算[J].电气化铁道,1995,17(3):39-41.XIE Honghe.Calculation on contact wire stress as electric power train's moving[J].Electric Railway,1995,17 (3):39-41.[4] 于万聚.高速电气化铁路接触网[M].成都:西南交通大学出版社,2002:252-253.[5] 宋保维.系统可靠性设计与分析[M].西安:西北工业大学出版社,2000:124-234.[6] 刘惟信.机械可靠性设计[M].北京:清华大学出版社,1998:120-130.[7] 万世明,赵善锐.桥梁桩基结构系统桩身构件可靠性分析[J].西南交通大学学报,2000,35(4):368.WAN Shiming,ZHAO Shanrui.Reliability analysis of the pile shaft of bridge pile foundation structure system[J].Journal of Southwest Jiaotong University,2000,35 (4):368.[8] 张建仁.结构可靠度理论及其在桥梁工程中的应用[M].北京:人民交通出版社,2003:7-8.[9] KIYOHIR A M.Reliability analysis of geometrically nonlinear structures with application to suspension bridges[D].California:University of Michigan,1999.[10] LYU M R.Techniques for software reliability engineering[J].Testing and Evaluation,1999,34 (2):35-39. -
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