摘要
根据圣维南原理将拱坝裂缝的大体位置作为一个子模型,利用细小的有限元网格对子模型进行剖分,利用破坏追踪的方法在子模型中搜索裂缝的位置,根据应力状态确定裂缝的产状。在子模型破坏过程中边界条件相应地会发生变化。利用子结构法将子模型的单元刚度矩阵凝聚到原始模型与子模型的公共节点上,利用原始模型重新进行整体分析,获得子结构在破坏过程中的边界条件,重复进行下去,可获得拱坝裂缝的相对精确位置。
Based on the Saint-Venant theory, the possible cracking location is used as a sub-model. Then very fine mesh grid is used to cut sub-models. The crack propagation can be found by tracing failure elements. Strength cracking state can be ascertained from stress states. With the cracking of elements, the boundary condition also changes. All elements in sub-model are agglomerated to the mutual nodes of sub-models and whole models. Then sub-structure method is used to solve the problem. The arithmetic flow chart is given.
出处
《中国农村水利水电》
北大核心
2009年第9期108-111,共4页
China Rural Water and Hydropower
基金
国家自然科学基金(59778002)
关键词
拱坝
裂缝位置
子模型
arch dam
cracking location
sub-model
