WJ-7型扣件横向阻力试验研究
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摘要
为确定轨条碎弯时WJ-7型扣件的横向刚度取值,在实验室条件下,对一段安装了一组扣件的短钢轨加载横向力,测量扣件铁垫板和钢轨截面轨头、轨腰、轨底的横向位移,考虑到试验误差,只取均匀性较好5组数据分析横向力与位移之间的关系。试验结果表明:铁垫板位移随横向力的加载呈线性增加;以铁垫板产生单位位移所需施加的横向力表征横向刚度,常阻力扣件横向刚度在143.7～162.1 kN/mm,小阻力扣件横向刚度在130.2～138.9 kN/mm;钢轨截面各位置横向位移曲线由二次抛物线和直线两部分组成。
In order to determine the lateral stiffness of WJ-7 fastener during rail broken bending, the transverse force of a short rail installed with a group of fasteners is loaded under laboratory conditions, and the transverse displacement of the fastener iron pad, and rail cross section rail head, rail web and rail bottom are measured. Considering the test error, only 5 groups of data with good uniformity are used to analyze the relationship between transverse force and displacement. The test results show that: the displacement of the plate increases linearly with the loading of the transverse force; the transverse stiffness is represented by the transverse force required by the iron-cushion plate to generate unit displacement; the lateral stiffness of the constant resistance fastener is 143.7～162.1 kN/mm, the transverse stiffness of the small resistance fastener is 130.2～138.9 kN/mm; and the transverse displacement curves at each position of the rail section consist of second degree parabola and straight line.
In order to determine the lateral stiffness of WJ-7 fastener during rail broken bending, the transverse force of a short rail installed with a group of fasteners is loaded under laboratory conditions, and the transverse displacement of the fastener iron pad, and rail cross section rail head, rail web and rail bottom are measured. Considering the test error, only 5 groups of data with good uniformity are used to analyze the relationship between transverse force and displacement. The test results show that: the displacement of the plate increases linearly with the loading of the transverse force; the transverse stiffness is represented by the transverse force required by the iron-cushion plate to generate unit displacement; the lateral stiffness of the constant resistance fastener is 143.7～162.1 kN/mm, the transverse stiffness of the small resistance fastener is 130.2～138.9 kN/mm; and the transverse displacement curves at each position of the rail section consist of second degree parabola and straight line.
引文
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[2] 刘丹,李培刚,赵坪锐.无砟轨道结构整体失稳可能性探讨[J].铁道建筑,2011(10):95-98.
[3] 胡华锋.客运专线无砟轨道无缝线路锁定轨温确定方法的探讨[J].中国铁道科学,2008,29(6):30-34.
[4] 任娟娟,杨荣山,赵坪锐,等.桥上无砟轨道设计与维修理论[M].北京:科学出版社,2015:11-12.
[5] 冯树琴.钢轨横向变形研究[D].成都:西南交通大学,2007.
[6] 张宏海.钢轨横移及偏转变形研究[D].成都:西南交通大学,2009.
[7] 全顺喜,王平,张海洋.曲线上钢轨横向位移影响因素分析[J].铁道建筑,2010(2):114-116.
[8] 刘勇.无砟轨道无缝线路钢轨横向变形模型试验研究[D].成都:西南交通大学,2015.
[9] 颜乐.CRTSⅠ型板式无砟轨道横向稳定性研究[D].成都:西南交通大学,2015.
[10] 杨荣山.轨道工程[M].北京:人民交通出版社,2013:112-113.
[11] 李子睿.扣件抗钢轨倾翻性能及钢轨倾翻角计算方法的研究[D].北京:中国铁道科学研究院,2010.
[12] 林培源,文沛溪,何伯诚.无缝线路的养护维修及其稳定性[J].铁道建筑,1985(10):9-14.
[13] 饶惠明.高速铁路桥隧过渡段钢轨温度和横向变形试验[J].铁道科学与工程学报,2017,14(9):1838-1844.
[14] 齐少轩,刘学毅.带减振扣件的整体道床轨道横向稳定性分析[J].铁道科学与工程学报,2014,11(5):12-17.
[15] 朱剑月,董光炎,李莉,等.用简化模型分析轮轨系统横向动力响应[J].铁道工程学报,2002(4):28-32.
[16] 何晓敏.直线电机地铁车辆轨道扣件系统刚度取值研究[D].成都:西南交通大学,2016.
[17] 伍曾,李洁青,黄伟,等.WJ-7型无砟轨道扣件扣压力损失的室温蠕变试验研究[J].铁道标准设计,2014,58(8):60-63.
[18] 韦凯,张攀,豆银玲,等.高速铁路无砟轨道扣件系统弹性垫板力学性能的温变试验[J].铁道学报,2016,38(7):98-104.
[19] 张凌之.小阻力扣件纵向阻力特性试验研究[D].成都:西南交通大学,2014.