'音转''合韵'说在段玉裁古音学理论体系中的价值

摘要

段玉裁古音学理论体系的核心是构建古音系统,从历时纵向上说明韵部系统的演变,并用"音转"解释例外;从共时横向上说明韵部系统与支撑材料的关系,并用"合韵"解释例外."音转"与"合韵"是段氏古音学体系的重要内容.段氏通过重点解释"音转"与"合韵"两类例外现象,保证了其所分韵部系统的科学合理性.%The framework of Duan Yucai's old Chinese phonology theory illuminates the rhyme category from two aspects.One is that interprets the evolution of the rhyme category diachronically and explains the exceptions with "Sound Transformation".The other is the framework elucidates the relationship between the rhyme category and its backing material synchronically.As well as, it explains the exceptions with "He Yun"."Sound Transformation" and "He Yun" are two core contents of the Duan's old Chinese phonology theory.According to mainly explain the two exceptions of "Sound Transformation" and "He Yun", thus Duan Yucai ensures that the categories of scientific rationality.