随机散粒岩土材料自然堆积2D数值仿真分析

2D Numerical Simulation Analysis of Natural Accumulation of Stochastic Particles Geotechnical Materials

采用散粒随机生成技术构建自然堆积仿真模型,分析散粒不同形态、粒径尺寸及表面粗糙程度对堆积休止角的影响,结果表明:在相同颗粒级配条件下,散粒形态越不规则,自然堆积休止角越大,且随散粒表面粗糙程度增加,休止角增大,孔隙率提高,散粒体流动性降低;通过分析不同特征下散粒的自然堆积休止角,得到散粒表面粗糙度对自然堆积休止角影响最大,形态次之,粒径最小;该方法可推广应用于松散岩土材料的流动、压实等动力学行为的模拟研究.

Constructing the simulation model of natural accumulation by using particles stochastic generation technology, analyzing what the affluence that different forms, particles sizes and the surface roughnesses make influences on angle of accumulation repose. The results show that： under the same grain composition, the more irregular particles form is, the larger the natural accumulation angle of repose becomes. And with the increase of particle surface roughness, the angle of repose becomes lager, the porosity increases but the liquidity reduces. Through the analysis of particles natural accumulation angle of repose under different char- most important influence factor of natural aecumula- tion repose angle, the forms is less and particles size is the least . This method can be applied to simulation study of dynamic behavior about the flow, compaction of loose geotechnical material.