Refinement finite element analysis of vierendeel sandwich plates based on superelement method
Aiming at the problem of large total degree of freedom of the calculation model and low computational efficiency in the refinement finite element analysis of the vierendeel sandwich plate,based on the structural characteristics of vierendeel sandwich plates,it was divided into several identical basic grids.Any grid was treated as a substructure and condensed into a superelement,and then the number of boundary degrees of freedom of the superelement was controlled.Based on the superelement,a new computational model was extended to reduce the total number of degrees of freedom in the finite element model of the vierendeel sandwich plate,thereby improving computational efficiency.A fine finite element model of a concrete vierendeel sandwich plate with a plane size of 16 m×16 m was established with different superelements and 0.1 m solid elements,and the static and dynamic analysis was performed.The results show that the parameters of vierendeel sandwich plates extracted by superelement method are less limited,and the structural parameters can be extracted quickly to complete the calculation.The smaller the number of superlement boundary nodes,the higher the computational efficiency,but the error increases accordingly.When the number of nodes of superelement is reduced by about 89％compared with the fine finite element and placed reasonably,the maximum relative error of calculation does not exceed 6％and the calculation time can be saved by 11％to 24％,and the image consistency of modal and time history analysis is better.The refinement finite element analysis of vierendeel sandwich plates based on superelement method is suitable for the parameter analysis and calculation of the elastic stage of vierendeel sandwich plate structure.
superelementvierendeel sandwich plateboundary degree of freedomsubstructurenoderefinement finite element analysis
万方数据
维普
