基于转换矩阵的新建无砟高铁动静态轨道质量指数关系研究
Research on transfer matrix between dynamic and static track quality index in newly-build ballastless track of high-speed railway

因检测原理及受力情况不同,轨道几何状态的动静态检测结果存在一定差异,如何利用静态数据推算动态指标,对无砟轨道精调作业和线路动态验收具有重要意义。以杭长高速铁路在联调联试阶段的动静态检测数据为对象,分析动静态TQI的差异并从概率角度建立二者之间的关联。研究结果表明:新建无砟轨道上行线动态TQI比静态TQI大0.4 mm,标准差大0.08 mm,动态检测得到的不平顺幅值和离散性更大。建立动静态TQI概率转换矩阵模型,并利用杭长下行线及宁安上行线数据进行验证,模型计算得到的动态TQI预测频数分布与实际频数分布相近。基于概率转换矩阵从TQI静态检测值推断动态值的方法可为无砟轨道精调作业和线路动态验收提供定量参考。
Due to the difference of inspection principle and track force situation, data from dynamic and static inspection is also different. How to use static inspection data to predict dynamic ones is of most importance for track fine adjustment and dynamic acceptance test. Based on the dynamic and static inspection data collected form Hangzhou-Changsha high-speed railway integration test and commissioning process, this paper has analyzed the difference and probabilistic relationship between dynamic and static Track Quality Index (TQI). Results show that dynamic TQI of upline is 0.4mm greater than static TQI in average, and 0.08mm in standard deviation, which indicates that under dynamic load, track irregularities have bigger amplitude and discreteness. Also the probabilistic transfer matrix model has been established between dynamic and static TQI, which has been verified by data from downline of Hangzhou-Changsha high-speed railway and upline of Nanjing-Anqing high-speed railway. The predicted frequency distribution of dynamic TQI is similar to the actual ones, which shows that the probabilistic transfer matrix model can be used for quantitative reference in track fine adjustment and dynamic acceptance test