Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data
Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data
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DOI：
10.1139/cgj-2015-0268
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发表时间：
2016-02
影响因子：
3.6
通讯作者：
L. Pen;D. Milne;D. Thompson;W. Powrie
中科院分区：
文献类型：
--
作者：
L. Pen;D. Milne;D. Thompson;W. Powrie
人们普遍认为，轨道支承刚度是控制轨道几何劣化率的主要因素，特别是在轨道支承刚度突然变化的情况下。因此，能够量化和检测轨道支撑刚度的变化具有相当大的潜在好处。近年来，使用各种类型的传感器的轨旁技术已经发展起来，以确定列车通过时的轨道偏转。然而，从这些测量中推断轨道支撑刚度需要对列车载荷和轨道行为进行假设，并且仍然存在不同解释的可能性。例如，来自移动列车的载荷是动态变化的，在轨道上的任何给定点测量它们的精确值通常是不可行的。本文提出了一种新的分析方法，该方法可应用于列车通过时轨道位移、速度或加速度的频谱来计算轨道支承刚度。
It is generally accepted that track support stiffness is a major factor controlling rates of track geometry deterioration, particularly where the track support stiffness changes abruptly. There is, therefore, considerable potential benefit in being able to quantify and detect changes in the track support stiffness. In recent years, trackside techniques using various types of transducers have been developed to determine track deflections as trains pass. However, deducing the track support stiffness from these measurements requires assumptions to be made concerning train loading and track behaviour, and the possibility of different interpretations remains. For example, loads from moving trains vary dynamically and it is not usually feasible to measure their exact values at any given point along the track. This paper presents new methods of analysis, which can be applied to frequency spectra of track displacement, velocity or acceleration generated as trains pass to calculate the track support stiffness for ...