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针对两种不同尺寸的颗粒,研究了仓底压力的最小值随填充质量和粮仓直径的变化关系,所得结果能用Janssen公式很好拟合,但其中的径向与轴向应力比值约为2,远大于通常粮仓工程规范中的Jaky公式估算值0.4,说明仓底压力最小时粮仓的应力状态靠近Rankine被动态。研究结果表明尽管粮仓的应力状态不尽相同,但它们都能较好地遵守Janssen提出的假设。
For the two different sizes of particles, the minimum pressure at the bottom of the bin with the filling quality and granary diameter changes, the results obtained by the good fit Janssen formula, but the radial and axial stress ratio of about 2 , Which is much larger than the estimated value of Jaky formula 0.4 in the normal granary project specification, indicating that the stress state of granary near Rankine is dynamic when the bottom pressure is the minimum. The results show that although the stress states of silos are different, they all conform well to the assumptions made by Janssen.