散粮堆底部压力颗粒流数值模拟分析

在前期散粮堆底部压力现场试验研究的基础上,利用PFC3D软件建立了相应的颗粒流数值模型,对散粮堆底部压力进行数值模拟分析。根据数值模拟得到的数据,利用MATLAB绘制了散粮堆底部压力分布三维网格图,直观地反映散粮堆底部压力分布形态。数值模拟结果表明,散粮堆底部压力分布是非均匀的,与现行的粮食平房仓设计规范以及传统的连续介质力学理论有所不同。数值模拟结果与前期现场试验结果基本吻合,进一步证实了散粮堆底部压力非均匀分布的特性,加深了对散体力学特性的认识和理解。

NUMERICAL ANALYSIS OF BASE PRESSURE OF BULK GRAIN PILEBY PARTICLE FLOW CODE

s: Based on the previous field test of base pressure of bulk grain pile, a corresponding numerical model is constructed by PFC3D to model and analysis the field test. According to numerical testing data, some gridding graphs of base pressure of bulk grain pile in 3D are drawn by MATLAB which directly reflects the distribution form of base pressure of bulk grain pile. The numerical results indicate that the distribution of base pressure of bulk grain pile is non-uniform, which is different from traditional continuation mechanics theory. The numerical results are nearly consistent with the previous field test results, so the non-uniform distribution feature of base pressure of bulk grain pile is conformed deeply. This papper deepen the compression to the feature of mechanics of granular medium.