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本文在“铁路线路相邻坡段坡度代数差值及列车纵向力的研究”基础上，采用列车纵向非稳态运动模型，通过数字仿真，计算列车以不同工况在不同线路纵断面上运动时产生的纵向力，研究纵断面连接中的最小坡段长度对列车纵向力的影响规律，据此对《铁路线路设计规范》中相关规定提出了修改建议。
Based on the study of the difference of slope algebra and the longitudinal force of train on the adjacent slope of the railway line, this paper uses the longitudinal unsteady movement model of the train to calculate the train movement under different conditions in different longitudinal sections through digital simulation The longitudinal force produced by the longitudinal section of the railway line, and the effect of the length of the smallest slope on the longitudinal section of the longitudinal section of the train to the longitudinal force of the train is studied. Based on this, some suggestions for modification of the relevant provisions in the Code for Design of Railway Routes are proposed.