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结构有限元计算中,在局部不协调网格界面上,以网格尺度较大单元节点作为基本节点,而界面上网格尺度较小单元节点作为从节点,建立了从节点与基本节点的线性插值关系,从而导出了以基本节点位移作为求解变量的线性插值法。该方法应用于地基上复杂结构的受力分析,可使得结构网格较密,而地基网格稀疏,从而达到不失计算精度,提高求解效率的目的。
In the finite element calculation of structure, on the local uncoordinated mesh interface, the larger unit node of grid scale is taken as the basic node, while the smaller unit node of grid interface is taken as the slave node, and the linear interpolation from node to basic node is established Then, the linear interpolation method with the displacement of the basic node as the solution variable is derived. The method is applied to the stress analysis of complex structures on the foundation, which can make the structure mesh more dense and the foundation mesh thinner, so as to achieve the goal of losing the calculation precision and improving the solution efficiency.