| 基于CT扫描的不规则外形颗粒三维离散元建模 |
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| 引用本文： | 杜欣,曾亚武,高睿,颜敬.基于CT扫描的不规则外形颗粒三维离散元建模[J].上海交通大学学报,2011,45(5):711-715. |
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| 作者姓名： | 杜欣 曾亚武 高睿 颜敬 |
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| 作者单位： | (武汉大学 土木建筑工程学院， 湖北 武汉 430072) |
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| 基金项目： | 中央高校基本科研业务费专项资金资助(20102100101000093); 湖北省自然科学基金重点项目(2010CDA057) |
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| 摘 要： | 为实现不规则颗粒材料三维离散元建模，通过X射线断层扫描技术获取真实颗粒的切片图像，并对其进行二值化处理和边缘点探测提取计算，以重建三维颗粒模型而获取颗粒空间坐标信息.引入最小基本球体半径、有效空间系数和分类半径作为控制参数，采用VC++语言编写颗粒模型并生成程序，运用基本球体进行可重叠组合，自动生成不规则颗粒模型.结果表明，在相同参数条件下，该程序运行结果惟一，且与初始条件无关.同时，通过调控控制参数，能够获得不同精度的模型，并使颗粒模型精度与所需球体之间达到平衡关系.
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| 关 键 词： | X射线断层扫描 不规则外形颗粒 离散元方法 数值建模 |
| 收稿时间： | 2010-10-19 |
3-D Modelling of Irregular Shape Particles for Discrete Element Method Based on X-ray Tomography |
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| DU Xin,ZENG Ya-wu,GAO Rui,YAN Jing.3-D Modelling of Irregular Shape Particles for Discrete Element Method Based on X-ray Tomography[J].Journal of Shanghai Jiaotong University,2011,45(5):711-715. |
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| Authors: | DU Xin ZENG Ya-wu GAO Rui YAN Jing |
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| Institution: | (School of Civil Engineering, Wuhan University, Wuhan 430072, China) |
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| Abstract: | In order to build 3-D models of irregular shape particles for discrete element method,the real ballast was scanned with X-ray tomography and its tomography images were obtained,a binary image processing was implemented for each image,and with the method of edge-points detection,the three-dimensional coordinates of the ballast were collected.Then,three governing parameters: minimum radius of basic-spheres,efficient space factor,and split-radius were introduced and the generating program of particle was compi... |
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| Keywords: | X-ray tomography(CT) irregular particles discrete element method(DEM) numerical modelling |
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