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建立在传统的连续介质力学基础上的有限元法等数值计算方法在关于研究非连续介质的问题上难以直接用于计算和模拟材料具体的破坏形式和破坏的整个过程,而离散元法在这一方面显示出巨大的优势。但是,对于颗粒模型的细观参数——法向刚度与切向刚度等参数的取值问题成为创建精确的颗粒模型的一道障碍。文章利用颗粒流离散元软件PFC~(3D)模拟试验室直剪试验,通过不断调整法向刚度与切向刚度的比值,即刚度比,拟合直剪试验的结果,最终达到标定颗粒流模型细观参数的目的。
Based on the traditional continuum mechanics, the finite element method and other numerical methods are difficult to directly calculate and simulate the concrete failure form and failure of the material on the study of non-continuous media, and the discrete element method in this On the one hand showed great advantages. However, the problem of the parameters of the mesoscopic parameters of the particle model, such as the normal stiffness and the tangential stiffness, becomes a barrier to the creation of an accurate particle model. In this paper, particle flow discrete element software PFC 3D simulation laboratory direct shear test, by constantly adjusting the ratio of normal stiffness and tangential stiffness, that is, the stiffness ratio, fitting the results of the direct shear test, and finally to achieve the calibration particle flow model The purpose of mesoscopic parameters.