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| 崩塌条件下颗粒重排区域的堆积结构图像测量方法 |
| Image measurement method for packing structure in particle rearrangement areas under avalanche conditions |
| 投稿时间：2023-12-17 |
| DOI：10.3969/j.issn.1005-5630.202312170135 |
| 中文关键词: 颗粒流 堆积结构 Voronoi图 崩塌 重排 |
| 英文关键词:granular flow packing structure Voronoi diagram avalanche rearrangement |
| 基金项目:国家自然科学基金（12072200 ，12002213） |
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| 摘要点击次数: 1970 |
| 全文下载次数: 1615 |
| 中文摘要: |
| 颗粒物质崩塌的触发与传播机制是一个十分复杂的问题，其内部静态堆积区域的堆积结构变化是关键。为了进一步研究崩塌系统内部的堆积结构特征，采用图像法识别三维滚筒侧面颗粒的空间坐标，用Voronoi图表征其堆积结构，并估算了崩塌规模。结果表明：该方法有效去除了内部颗粒的反光点在表层颗粒定位中的干扰，滚筒侧面表层颗粒的堆积结构可以有效体现三维系统的堆积结构；线形结构更容易参与颗粒重排，且其在垂直于滚筒半径的方向上更脆弱；崩塌间隔期间被动层颗粒堆积结构变化规模与下一次崩塌的规模呈正线性相关，与到下一次崩塌发生之间的时间间隔呈负相关。 |
| 英文摘要: |
| The triggering and propagation mechanisms of particle material avalanche constitute an exceedingly complex issue, with the crucial factor being the variation in the packing structure of the internal static accumulation area. To delve further into the packing structure of the rearrangement region within the avalanche system, this study employed an image-based approach to identify the spatial coordinates of three-dimensional cylindrical particles on the side and utilized Voronoi diagrams to characterize their packing structure. The results indicate that the Voronoi polygon area of the side-stacked particles follows a gamma distribution. Linear structures are more prone to participating in particle rearrangement, and they exhibit greater fragility in the direction perpendicular to the radius of the cylinder. During the avalanche interval, the changes in the scale of the passive layer particle packing structure are positively linearly correlated with the magnitude of the next avalanche and negatively linearly correlated with the time interval until the next avalanche occurs. |
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