一、概述 冻结切片法是解决三向光弹性问题的普遍采用的有效的方法,但实验技术,计算程序都比较繁琐。散光光弹法早在1940年[1]左右就已被提出,它的主要优点是不必破坏模型,对有些情况也可不必进行冻结。但由于技术上存在一些困难,过去一直没能较广泛地采用。自从激光光源出现以 First, an overview Frozen slice method is to solve three-dimensional photoelastic problems commonly used and effective method, but the experimental techniques, calculation procedures are more cumbersome. Astigmatism has been proposed as early as 1940 [1] and its main advantage is that it is not necessary to damage the model and in some cases it is not necessary to freeze it. However, due to some technical difficulties, it has not been widely adopted in the past. Since the laser light appeared