利用Munjiza的可离散有限元法(FE/DEM)二维Y2D程序,对混凝土梁中点和混凝土短柱受轴向冲击进行数值模拟;并考察程序的局限性。结果表明:混凝土梁的开裂位置与ANSYS软件预测的高应力区吻合,混凝土短柱裂纹的产生、发展、破裂和破碎各阶段的形态合理,Y2D程序能够预测连续固体向非连续体转变的全过程;程序存在无法施加集中力载荷以及位移载荷等局限性,不适于应用性计算,需要完善及改进。 Munjiza finite element method (FE / DEM) two-dimensional Y2D program was used to simulate the axial impact of the concrete mid-point and the concrete short column. The limitations of the program were also investigated. The results show that the crack location of concrete beam agrees well with the predicted high stress area of ​​ANSYS software, and the formation, development, rupture and fragmentation of concrete short columns are reasonable. The Y2D program can predict the whole process of continuous solid to discontinuous transition ; Program can not exert concentrated load and displacement load limitations, is not suitable for applied computing, need to improve and improve.