摘要
为了提高混凝土细观力学预处理过程中骨料投放效率,提出了一种随机骨料的投放方法。基于混凝土随机骨料生长方式,提出了骨料投放的"分层摆放法"。采用状态矩阵法的判别准则,判别空间中任意一点与骨料凸多边形/凸多面体的位置关系,实现了二维平面/三维空间有限元网格坐标的生成。结果表明,与现有方法相比,该方法可节省CPU时间,具有极高效率。这为实现大规模数值细观混凝土预处理,提供了有力的工具。
A pre-processing approach was developed to enhance the efficiency of aggregate analyses and finite element （FE） mesh generation for random aggregate arrangements for studying the meso-mechanics of concrete. A layering disposition method was developed to analyze high aggregate content concrete. A state matrix criterion was used to relate an arbitrary space point to the convex polygons/polyhedrons of the aggregate, and to generate 2-D plane/3-D space FE mesh coordinates. The method reduces the CPU time compared with the current division method as a powerful tool for pre-process large meso-concrete finite element analyses.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第12期2048-2052,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(90510018)
关键词
混凝土细观力学
骨料投放
状态矩阵法
concrete meso-mechanlcs
aggregate arrangements
state matrix method
