| 三维离散块体边-边接触模拟 |
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| 引用本文： | 姜清辉,张煜.三维离散块体边-边接触模拟[J].岩土力学,2006,27(8):1369-1373. |
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| 作者姓名： | 姜清辉 张煜 |
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| 作者单位： | 1. 武汉大学 水资源与水电工程科学国家重点实验室，武汉 430072；2. 中国科学院 岩土力学重点实验室，武汉 430071 |
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| 基金项目： | 国家自然科学基金;国家高技术研究发展计划(863计划);国家重点实验室基金;中国科学院基金 |
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| 摘 要： | 任意形状块体的接触模拟是发展三维不连续变形分析方法（3D-DDA）的关键问题。提出了三维离散块体单元的 边-边接触模型，并给出了边-边接触进入面的判定方法和嵌入准则。基于矢量分析和罚函数法，推导了接触子矩阵的表达式，算例分析结果表明了该模型的有效性。
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| 关 键 词： | 3D-DDA 边-边接触 进入面 嵌入准则 |
| 文章编号： | 1000-7598-（2006）08-1369-05 |
| 收稿时间： | 2004-10-22 |
| 修稿时间： | 2005-01-24 |
Edge-to-edge contact simulation for three-dimensional distinct block system |
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| JIANG Qing-hui,ZHANG Yu.Edge-to-edge contact simulation for three-dimensional distinct block system[J].Rock and Soil Mechanics,2006,27(8):1369-1373. |
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| Authors: | JIANG Qing-hui ZHANG Yu |
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| Institution: | 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | A contact theory governing the discontinuous contacts between arbitrarily shaped polyhedral blocks is a major component of three-dimensional discontinuous deformation analysis method(3D-DDA).An edge-to-edge contact model,which forms a part of the contact theory,is proposed.Details are given including the detection of edge-to-edge contact type,judging of the first entrance faces,and the criteria for inter-penetration.Contact submatrices are derived by vector analysis and the penalty function method.This edge-to-edge contact model has been implemented into a 3D-DDA computer program.Two verification cases demonstrate the validity of the model and the capability of 3D-DDA to deal with large movements and multi-block interaction. |
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| Keywords: | 3D-DDA |
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