摘要
钢轨廓形打磨能有效延长钢轨使用寿命,打磨过程中的一个重要步骤是从多个实测钢轨廓形中选取或计算一个代表廓形,与目标廓形对比后对打磨电机磨石角度进行排列安排。针对实测钢轨廓形数据中均存在的周期性或偶发脉冲干扰问题,利用Savitzky-Golay平滑法能很好地保持曲线形状,同时又达到较好的平滑效果。基于轮轨接触几何关系及接触点位置的概率分布,分析采用算术平均、加权平均、最小二乘距离法和散点拟合法计算得到的钢轨代表廓形与实测钢轨廓形组的轮轨接触点分布曲线相关性。结果表明:无论是在直线还是曲线区段,算术平均法的结果均最贴近实测数据结果,其次是散点拟合法的结果,加权平均、最小二乘距离法的结果相符程度较低。
Rail profile grinding can effectively prolong the service life of the rail.An important procedure in the grinding process is to choose or calculate a representative profile from many measured rail profiles, so as to arrange the grinding angle for each grinding motor on the grinding car by comparing the representative profile with the target profile.In order to solve the problem of periodic and occasional pulse interference in the measured rail profile data, the Savitzky-Golay smoothing method was chosen to smooth the profile of the rail, which can achieve a quite good smoothing effect without significantly changing the curve shape.Based on the wheel-rail contact geometry and probability distribution of contact position on the rail, the paper analyzed the correlation between the group of measured rail profiles and the representative rail profile obtained by the following four methods: the arithmetic average method, weighted average method, least squares distance method and points fitting method.The results show that, in the straight and curve section, the results of the arithmetic average method are closest to the measured data, followed by the results of the points fitting method.The results of the least square distance method and weighted average method are less consistent.
作者
丁军君
吴朋朋
王军平
李芾
DING Junjun;WU Pengpeng;WANG Junping;LI Fu(School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031,China;China Railway Materials Track Technology Service Group Co., Ltd., Beijing100036,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2019年第7期135-140,共6页
Journal of the China Railway Society
基金
中国铁路总公司科技研究开发计划(2017G003-A)
四川省重点研发项目(2019YFG0042)
关键词
钢轨廓形
平滑
代表廓形
轮轨接触
相关系数
rail profile
smoothing
representative profile
wheel-rail contact
correlation coefficient
