筒仓粮堆内部竖向压力计算方法

考虑到筒仓粮堆内部同一水平面上竖向压力的不均匀分布现象,提出储料对仓壁的摩擦及粮堆内部储料间摩擦的共同作用是造成粮堆内部竖向压力不均匀分布的主要因素。根据有限元结果与实验数据,提出了筒仓仓壁处和筒仓内部有效摩擦系数分布规律的数学表达式。基于该表达式,推导出粮堆空间任意一点竖向压力的理论计算方法和简化公式。公式结果与有限元和实验数据有较好的一致性。

CALCULATION METHOD OF VERTICAL PRESSURE IN SILO GRAIN PILE

Considering the uneven distribution of vertical pressure at the same horizontal level in silo grain, it is pointed out that the friction between the silo wall and the internal friction of the grain storage is the main factor leading to the uneven distribution of the vertical pressure at the same horizontal level of the grain heap. According to the finite element results and experimental data, the mathematical expression of Effective Friction Coefficient of silo is put forward. Based on the expression, the theoretical calculation method and simplified formula for the vertical pressure at any point of the grain pile space is deduced. The formula is in good agreement with the finite element method and the experimental data.