一前言滑移线法是求解平面变形(或称平面流动)问题的一个重要方法,对于轴对称流动问题是不适用的。但从几何变形的角度,可将轴对称流动看做是两次平面变形的结果。这样,根据能量不变的原理可以认为轴对称流动的变形应力(出、入口断面上的平均轴向法应力)是相当的平面流动的二倍。 A preface The slip line method is an important method to solve the problem of plane deformation (or plane flow), which is not suitable for the axisymmetric flow problem. However, from the perspective of geometric deformation, axisymmetric flow can be seen as the result of two plane deformations. Thus, according to the principle of energy invariance, it can be assumed that the deformation stress of the axisymmetric flow (average axial stress at the outlet and inlet cross-sections) is twice that of a comparable plane flow.