高速铁路轨道中长波平顺性参数计算方法

摘要

高速铁路轨道中长波平顺性参数的计算方法是高速铁路轨道精测与精调的核心技术，现有的中长波平顺性参数计算多采用以轨道点法向偏移量代替矢距差（即设计矢距与实测矢距之差）的近似计算方法。由于该算法忽略实测弦线端点偏差的影响，导致轨道实测轨向（高低）计算结果与严密算法计算结果存在一定的偏差。鉴于现有近似算法存在准确度低的缺点，文中在现有近似算法的基础上提出一种改进算法，并通过对轨道实测坐标数据的计算和对比，验证改进算法的可行性和准确性，并提高高铁轨道中长波平顺性参数计算结果的准确度，可为高速铁路轨道精测与精调提供参考。%The computational method of medium‐and‐long‐wave comfort parameters is a core technology in the high‐speed railway track’s precise measurement and fine adjustment .In the current medium‐and‐long‐wave comfort parameter computational methods ,an approximate method is mostly adopted ,that is ,vector distance difference (the difference between designed vector distance and actual vector distance ) replaced by track points’ normal direction .The ignorance of measured chord endpoint’s division in the computational method leads to a certain deviation between actual measured track direction/height and the theoretical one . As for the low accuracy of the approximate computation ,this paper proposes an improved method ,and verifies its feasibility and accuracy by the calculation and comparison of actual measured data .T he improved computation improves the computational accuracy w hich provides a reference for the high‐speed railway track’s precise measurement and fine adjustment .