摘要
根据最小势能原理 ,将有限单元疏密网格之间的界面刚度耦合到总刚中 ,保证该界面两侧各相应点的位移和应变在界面上协调。使三维有限元疏密网格的过渡易于实现 ,简化前处理工作 。
According to the least potential energy method, the stiffness of the interface between two kinds of meshes is coupled into the whole stiff matrix. Then the continuity of the displacements at every point in the interface can be guaranteed. By this means, to change the density of the FEM mesh from a coarse mesh to a fine mesh is easily to be achieved. The pre processing work of FEM is much simplified. This method can be used to densify the mesh of a local area and to trace the cracking of this area.
出处
《岩石力学与工程学报》
CSCD
北大核心
2000年第5期562-566,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金!( 5 993 9190 )
关键词
耦合
疏密网格
界面过渡单元
大坝开裂
the least potential energy method
couple
coarse mesh and fine mesh
interface transition element
