基于边-边接触的三维离散数值计算模型

Three Dimensional Distinct Element Method Based on Face-to-Face Contact Model

采用边 -边 (面 -面 )接触离散元模型 ,研制了三维离散元计算程序 .计算了集中载荷作用下弹性基础的沉降和应力场 ,通过与解析解的比较 ,基本验证了该程序的可靠性 .当单元之间的位移和变形相对于单元本身的尺度较小时 ,采用边 -边接触模型研究不连续介质问题和颗粒散体问题比角

The program of three dimensional distinct element method based on edge to edge (face to face) contact model was developed. The subsidence and stress field of an elastic base applied by a force are present in this paper. Compare with analytical results, the reliability of the program is verified. When the displacement and distortion of an element is small compared to its dimension, the edge to edge contact model are more efficient than the corner to edge contact model for discontinuous media and grain media.