An Angle-Based Method Dealing with Vertex-Vertex Contact in the Two-Dimensional Discontinuous Deformation Analysis (DDA)
文献类型：期刊论文
| 作者 | Fan, Huo1,2,3,4 ; He, Siming2,3,4
|
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2015-09-01 |
| 卷号 | 48期号:5页码:2031-2043 |
| 关键词 | DDA Vertex-vertex contact Indeterminacy Pretreatment Angle-based method |
| ISSN号 | 0723-2632 |
| 通讯作者 | Fan, Huo |
| 英文摘要 | Due to the discontinuity of the direction of a normal vector at the corner, vertex-vertex contact is indeterminate in numerical modelling. Two classes are indeterminate in two-dimensional discontinuous deformation analysis (DDA), designated as "genuine indeterminacy" and "pseudo indeterminacy". While examining these indeterminacies, it is necessary to pre-process quasi-vertex-vertex contact and determine contact or entrance edges. On one hand, improper pre-processing not only changes the equilibrium equations of the system, but also increases the burden on open-close iteration. On the other hand, there are two kinds of quasi-contact edges, i.e. the same and different block quasi-contact edges. Certain previous distance-based methods, which are used to seek the correct entrance edge, lead to some forced contacts, including vertex-vertex or vertex-edge. New pre-processing and angle-based methods for determining entrance edges are developed in this study. Additionally, the new concept of strengthening the movement trend of blocks is presented in DDA. The new pretreatment method combining the angle-based method and a strategy for strengthening the movement trend of blocks are intended to reduce forced contacts, maintain the movement trend of blocks, and speed up open-close iterations to a certain extent. Furthermore, the new method only depends on the orientation of quasi-contact edges and the movement trend of convex corners. The effectiveness of these improvements is verified by translational motion, rotation trend, and time-step size effect tests. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Engineering, Geological ; Geosciences, Multidisciplinary |
| 研究领域[WOS] | Engineering ; Geology |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360006700018 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/10914]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Huo,He, Siming. An Angle-Based Method Dealing with Vertex-Vertex Contact in the Two-Dimensional Discontinuous Deformation Analysis (DDA)[J]. ROCK MECHANICS AND ROCK ENGINEERING,2015,48(5):2031-2043. |
| APA | Fan, Huo,&He, Siming.(2015).An Angle-Based Method Dealing with Vertex-Vertex Contact in the Two-Dimensional Discontinuous Deformation Analysis (DDA).ROCK MECHANICS AND ROCK ENGINEERING,48(5),2031-2043. |
| MLA | Fan, Huo,et al."An Angle-Based Method Dealing with Vertex-Vertex Contact in the Two-Dimensional Discontinuous Deformation Analysis (DDA)".ROCK MECHANICS AND ROCK ENGINEERING 48.5(2015):2031-2043. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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