The aim of this paper is to evaluate the train/track induced loads on the substructure by modelling the wheel, at each instant, as a moving sinusoidal pulse applied in a very short period of time. This assumption has the advantage of being more realistic as it reduces the impact of time on the load definition. To that end, mass, stiffness, and dumping matrices of an elementary section of track will be determined. As a result, the equations of motion of a section of track subjected to a sinusoidal pulse and a rectangular pulse respectively is concluded. Two numerical methods of resolution of that equation, depending on the nature of the dumping matrix, will be presented. The computation results will be compared in order to conclude about the relevance of that load model. This approach is used in order to assess the nature and the value of the loads received by the substructure.
翻译：本文的目的是评估亚结构的火车/轨道引引负负载,通过在每一瞬间对轮进行模拟,作为在很短的时间内应用的一种移动的类流脉脉冲。这一假设的优点是更加现实,因为它减少了时间对负载定义的影响。为此,将确定轨道基本部分的质量、硬度和倾弃矩阵。因此,将得出分别受正弦脉冲和矩形脉冲影响的轨迹部分运动的方程式。将提出两种数值方法,根据倾销矩阵的性质来解析该等式。计算结果将进行比较,以便得出该负载模型的相关性。这一方法用于评估子结构所收到载量的性质和价值。
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