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为了模拟脆性无序介质的冲击破碎过程以及揭示其所伴随的非线性动力学特性，提出了梁－颗粒细观数值模型。在该模型中，介质被随机地离散成Ｖｏｒｏｎｏｉ多边形单元，相邻多边形采用弹脆性梁单元联结，介质的连续损伤和破坏由梁单元的断裂来模拟。算例表明，梁－颗粒细观数值模型不仅能实时给出介质的破碎图象及其分形维数，而且还能模拟介质内部应力和质点运动速度随时间的演化过程。
In order to simulate the impact crushing process of brittle disordered media and to reveal its nonlinear dynamic characteristics, a numerical model of beam-particle mesostructure was proposed. In this model, the media is randomly dispersed into Voronoi polygonal elements. The adjacent polygons are connected by the elastic brittleness beam elements. The continuous damage and failure of the media are simulated by the fracture of the beam elements. The numerical example shows that the beam - particle numerical model not only gives the broken image and the fractal dimension of the medium in real time, but also simulates the evolution of stress and particle velocity with time.