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众所共知,缓和曲线是铁路上最常使的重要曲线;但其公式来源怎样从理论上正确地推导,并不为一般人所掌握。因此一些书刊中所载的公式,常出现讹错,无法查证。本文分两步来讨论:首先介绍公式的推导方法,其次讨论使用何类型公式为最适当,而不致在应用时产生误差。
It is well known that the easement curve is the most important important curve on the railway. However, how its formula source is derived theoretically and correctly is not for the average person to grasp. Therefore, some books contained in the formula, often errors, can not be verified. This article is divided into two steps to discuss: First, introduce the derivation of formulas, followed by discussion of what type of formula is the most appropriate, but not in the application of error.