论文重点分析了车辆运行速度、轮轨摩擦系数、车辆载重、轨道几何不平顺、偏载、轨距大小、车轮踏面形状等因素对脱轨的影响。
The influence of train running speed, wheel-rail friction coefficient, vehicle load, track geometric irregularity, partly load, gauge and the shape of wheel tread on derailment was emphasized.
近年来，随着列车速度的不断提升和列车运载重量的不断增加，铁路的运营安全越来越重要，相应地对无损检测（NDT）的要求也越来越高。
Recently, with the improvement of train speed and trainload, traffic safety on railway becomes more and more important. Accordingly, the demand of Non-Destructive Testing (NDT) is growing higher.
铁路货车密度、载重、速度是提高铁路运输能力的三大要素。
Density, carrying capability and speed of railway freight cars are the three essential factors to improve the railway transportation ability.
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