对《道岔设计手册》(铁三院主编,人民铁道出版社1975年版)第67页“……在12号及以下的小号码道岔中,采用缓和曲线没有实际意义,只有在大号道岔中才有可能。……”笔者有不同看法。根据列车由直线段过渡到曲线段上运行的动力学性质,苏联沙湖年慈教授提出了理论上的缓和曲线应满足的数学条件,可归纳为表1。 The “Turnout Design Manual” (Iron and Steel House editor, People’s Railway Publishing House 1975 edition) p. 67 “...... In the No. 12 and below small number turnout, the use of easement curve is not meaningful, only in the large turnout It is possible ... ... ”I have different views. According to the dynamics of the train running from a straight line segment to a curved line segment, Prof. Nian Ci of the Soviet Union, Shah Nien proposed the mathematical conditions that should be met by the theoretical easing curve and can be summarized in Table 1.