颗粒固体应力转向比的光弹法探测
发布时间：2018-11-29 13:30
【摘要】：利用压敏双折射光学特性材料,实验测量了在自然堆积和密堆积两种制样方式下颗粒仓轴向荷载在仓壁上随深度的分布.发现在填充颗粒总质量相同、容器不变的情况下,颗粒仓轴向荷载在仓壁上的分布不随颗粒深度单调变化,而是随深度呈单峰结构,数值模拟与实验观察定性符合,并且发现峰值依赖于荷载大小和样品的制备方式.另外,我们也测量了在不同填充高度下的颗粒底部平均应力随轴向荷载的变化,将其与边壁应力对比,得到颗粒体系不同深度处的转向比.
[Abstract]:In this paper, the axial load distribution of grain bunker on the wall of the silo is measured by means of pressure sensitive birefringence optical characteristic material under two kinds of sample preparation modes: natural and dense stacking, and the distribution of axial load on the wall of the silo is measured. It is found that the distribution of axial load on the wall of the silo does not change monotonously with the depth of the particle, but with the same mass of the filled particles and the same container. The numerical simulation is consistent with the experimental observation qualitatively, and the distribution of the axial load on the wall does not change monotonously with the depth of the particle. It is also found that the peak value depends on the load size and the preparation method of the sample. In addition, the variation of the average stress at the bottom of the particle with axial load at different filling heights is also measured, and the steering ratio at different depths of the particle system is obtained by comparing it with the stress on the side wall.
【作者单位】： 西北师范大学物理与电子工程学院;中国科学院物理研究所;甘肃民族师范学院物理与水电工程系;中国科学院大学物理学院;中国科学院近代物理研究所;
【基金】：国家自然科学基金(批准号:11274354,11474326,11565021) 中国科学院空间科学战略性先导科技专项(批准号:XDA04020200) 地震行业科研经费(批准号:201208011)资助的课题~~
【分类号】：O348.1
本文编号：2365126
[Abstract]:In this paper, the axial load distribution of grain bunker on the wall of the silo is measured by means of pressure sensitive birefringence optical characteristic material under two kinds of sample preparation modes: natural and dense stacking, and the distribution of axial load on the wall of the silo is measured. It is found that the distribution of axial load on the wall of the silo does not change monotonously with the depth of the particle, but with the same mass of the filled particles and the same container. The numerical simulation is consistent with the experimental observation qualitatively, and the distribution of the axial load on the wall does not change monotonously with the depth of the particle. It is also found that the peak value depends on the load size and the preparation method of the sample. In addition, the variation of the average stress at the bottom of the particle with axial load at different filling heights is also measured, and the steering ratio at different depths of the particle system is obtained by comparing it with the stress on the side wall.
【作者单位】： 西北师范大学物理与电子工程学院;中国科学院物理研究所;甘肃民族师范学院物理与水电工程系;中国科学院大学物理学院;中国科学院近代物理研究所;
【基金】：国家自然科学基金(批准号:11274354,11474326,11565021) 中国科学院空间科学战略性先导科技专项(批准号:XDA04020200) 地震行业科研经费(批准号:201208011)资助的课题~~
【分类号】：O348.1
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