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褶皱含有岩石经历的变形和变形条件的信息。力学、数学、数值和实验分析显示，通过分析单层纵弯褶皱的形态可获得流变学信息。数值模拟表明褶皱的曲率指数ｋｉ对于应力指数ｎｌ有很好的依赖性，当波长厚度比λ／ｈ≥１０时，ｋｉ随着ｎｌ的增加而增加。基于数值模拟的结论，分析了北京西山板岩中石英脉肠状褶皱，获得了石英脉的应力指数大于１０的结果，并进而获得石英脉对板岩的粘度比在２４１～６６２之间。认为这种小构造的研究方法是一个新的获取岩石流变参数的可行途径
The folds contain information about the deformation and deformation conditions experienced by the rock. Mechanics, mathematics, numerical and experimental analysis show that rheological information can be obtained by analyzing the morphology of single-layer longitudinal bending folds. The numerical simulation shows that the curvature index ki of the wrinkles has a good dependence on the stress index nl. When the wavelength thickness ratio λ / h≥10, ki increases with the increase of nl. Based on the numerical simulation results, the intestinal folds of quartz vein in Beijing Xishan slate are analyzed. The results show that the stress index of quartz vein is greater than 10, and the viscosity ratio of quartz vein to slate is between 241 and 662. It is considered that the research method of this small structure is a new feasible way to obtain rheological parameters of rocks