| 基于CT图像分析建立岩土材料数值模型的方法研究 |
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| 引用本文： | 毛灵涛,毕玉洁,左建民,郝丽娜,王欢.基于CT图像分析建立岩土材料数值模型的方法研究[J].CT理论与应用研究,2010,19(4):27-34. |
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| 作者姓名： | 毛灵涛 毕玉洁 左建民 郝丽娜 王欢 |
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| 作者单位： | [1]中国矿业大学（北京）煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学（北京）力学与建筑工程学院,北京100083 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目，北京市优秀博士论文指导教师基金资助项目，教育部博士点新教师基金资助项目 |
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| 摘 要： | 根据材料内部真实结构建立数值计算模型是岩土力学研究的一个热点。本文针对不同材料内部结构特征,介绍了等效图形法与边缘矢量化两种建模方法,并以自制孔隙岩土材料和混凝土的CT图像为例,说明了两种建模步骤。分析表明:当图像的灰度直方图具有明显双峰或多峰结构时,特征区域易分割;而当灰度直方图为单峰结构时,可以通过数学形态学的top-hat方法进行图像增强,以方便特征区域的提取。对于孔隙结构,可以利用等效圆或等效椭圆表征,建立相应的数值模型;而当内部结构复杂时,可利用特征边缘矢量化方法进行建模。本研究为如何建立反映岩土材料内部真实结构数值模型提供了方法。
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| 关 键 词： | 岩土材料 CT图像 数值模型 |
Study on Building Geomaterial Numerical Model Method Based on CT Image |
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| MAO Ling-tao,BI Yu-jie,ZUO Jian-min,HAO Li-na,WANG Huan.Study on Building Geomaterial Numerical Model Method Based on CT Image[J].Computerized Tomography Theory and Applications,2010,19(4):27-34. |
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| Authors: | MAO Ling-tao BI Yu-jie ZUO Jian-min HAO Li-na WANG Huan |
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| Institution: | b a).State Key Laboratory of Coal Resources and Safe Mining;b).School of Mechanics ＆ Civil Engineering,China University of Mining ＆ Technology,Beijing 100083,China |
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| Abstract: | Building numerical model based on actual mesostructure is a hot research field of rock-soil mechanics.According to the different inter structure,equivalence graph and edge vectorization methods are introduced.Taking the pore geomaterial made by ourselves and concrete CT images as examples,the steps of building model are shown.Analyses prove that it is easy to segment character areas when the image histogram has two or more peaks.When the image histogram has only one peak,top-hat mathematical morphology method can be used to enhance image,which make the segment easier.Equicalence circle or ellipse are placed for pore strucure in numerical model,while edge vectorization is applied to characterize the complicated structure.The results provide a method to build numerical model based on actual mesostructure. |
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| Keywords: | geomaterial CT image numerical model |
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