捣固与打磨复合作业下有砟轨道几何不平顺预测模型

Geometric Irregularity Prediction Model of Ballasted Track Considering Tamping and Grinding

摘要:

轨道几何不平顺的预测是铁路部门实现由周期修到状态修转化的基础，也是制定养修策略的关键。然而现有预测模型计算比较复杂且鲜有考虑捣固、打磨等复合作业对轨道不平顺的影响。为提升其运算效率与预测精度，考虑了不同作业区段的差异性，以有砟轨道几何不平顺恶化函数、捣固打磨作业下的恢复函数为研究对象，采用数值拟合等方法，形成了各区段特有的恶化矩阵，建立了捣固与打磨复合作业下的有砟轨道几何不平顺预测模型。利用京沪线相关里程数据进行预测分析，结果表明，所建立的模型有效，结果满足现场预测需求。

关键词:有砟轨道;几何不平顺;恶化矩阵;捣固作业;打磨作业

Abstract:

The prediction of track geometric irregularity is the basis for the railway department to realize the transformation from periodic repair to state repair， which is the key to formulating the maintenance strategy. However， in the existing prediction models， the calculation is complex， and the impact of tamping， grinding and other composite operations on track irregularity is rarely considered. In order to improve the operation efficiency and prediction accuracy， considering the differences of different operation sections， taking the geometric irregularity deterioration function of ballasted track and the recovery function under tamping and grinding operation as the research object， the unique deterioration matrix of each section is formed by using numerical fitting and other methods， and the geometric irregularity prediction model of ballasted track under tamping and grinding combined operation is established. The results show that the established model is effective and the results meet the needs of field prediction.

Key words:ballast track;geometric irregularity;deterioration model;tamping operation;grinding operation