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建立了三维梁－颗粒模型， 用以模拟岩石材料的细观力学行为。在此模型中， 岩石材料被随机地离散成一系列的颗粒单元， 相邻颗粒单元的形心由弹脆性的梁单元连接， 以考虑材料的连续性。材料的无序性通过改变颗粒单元的尺寸、位置或梁单元的力学性质来实现。算例表明， 该模型能够较为真实地模拟出岩石材料性质对荷载－位移曲线的影响， 以及裂纹扩展过程中所伴随的损伤局部化现象。
A three-dimensional beam-particle model was established to simulate the meso-mechanical behavior of rock materials. In this model, the rock material is randomly dispersed into a series of particle units, the centroids of adjacent particle units are connected by brittle beam elements to consider the continuity of the material. The disorder of the material is achieved by changing the size, position or mechanical properties of the beam elements. Examples show that the model can simulate the influence of rock material properties on the load-displacement curve and the localization of damage accompanying the crack propagation process.