By using the calculus thought,based on the traditional graphic method and the law of conservation of energy,this article started from a new point of view to establish the calculation model,taken the instant speed and time that the vehicle humped to an arbitrary point of the railroad as a direct inspection target,calculated the interval of key points indirectly.The results could be compared with the original design.The computer program was based on ObjectARX to the secondary development of AutoCAD.After testing,the results obtained by this method could be proved by the results of the original design.%借鉴微积分思想,以传统图解法和能量守恒定律为基础,从一个新的角度着手建立计算模型,以车辆溜放至径路上任意一点时的即时速度、即时时间作为直接检查目标,以此间接推导计算出关键点位的间隔情况,从而可与原设计结果进行比较分析.计算机程序是基于ObjectARX对AutoCAD的二次开发.经过检验,该检查方法所获得的结果与原设计图解结果可互为印证,是一种可行的方法.
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