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为探索散体工程材料的力学特性,采用数值仿真技术模拟了柱状堆石体试件的成型过程。采用了材料点法作为仿真计算模型。在仿真分析中,堆石体颗粒用随机生成方法构造,具有随机形状且符合级配要求,并用材料点离散描述。数值仿真与实验室中实际堆石体成型过程相同,颗粒分批在重力作用下落入成型桶中,在阻尼措施作用下能量耗散,形成具有一定密实度的试样。该模拟再现了试件成型过程中颗粒之间的相互作用,包括挤压、滑移、分离等现象。该方法可用于深入研究散体材料特性。
In order to explore the mechanical properties of bulk engineering materials, the numerical simulation technique was used to simulate the forming process of columnar rockfill specimens. The material point method is adopted as the simulation calculation model. In the simulation analysis, the rockfill particles are constructed by random generation method, have random shapes and meet the gradation requirements, and are described by the material points discretely. The numerical simulation is the same as the actual forming process of rockfill body in the laboratory. The particles fall into the forming bucket under the action of gravity and the energy is dissipated under the damping action to form a sample with a certain density. The simulation reproduces the interaction between the particles in the forming process of the specimen, including extrusion, slippage, separation and so on. This method can be used to investigate in-depth material properties.