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。
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.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第8期1369-1373,共5页
Rock and Soil Mechanics
基金
国家自然科学基金(No.50309010)
国家自然科学基金雅砻江水电开发联合研究基金重点项目(No.50539100)
水资源与水电工程科学国家重点实验室开放基金(No.2003C004)
中国科学院岩土力学重点实验开放基金(No.206152152)
关键词
3D—DDA.边-边接触
进入面
嵌入准则
3D-DDA
edge-to-edge contact
entrance faces
criteria for inter-penetration
