三维离散元模型及计算参数选取研究

Study on Three-Dimensional Discrete Element Method and Parameter Adoption

通过大量的计算机模拟试验、物理模型试验及一定的理论分析,改进了三维离散元模型,利用速度时程曲线分析了计算模型的稳定性;根据速度分布的方差时程曲线探讨了各计算参数与速度分布之间的关系,最后通过散粒体堆积的等值线图进一步验证了模型的正确性和参数取值的合理性。

Based on a large number of computer simulation experiments, physical model experiments and some theoretic analysis,the three-dimensional discrete element method is modified. Firstly, the stability of the computer simulation is analyzed by virtue of temporal curves of velocity. Secondly, the relationship between parameters and velocity distribution is discussed via the temporal curves of variances. Finally, the correctness of models and the rationality of parameter adoption are further validated by the contour of macadam.