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本文在文献[1]的基础上将QM_6单元推广到三维8-20节点等参元中,结合工程实际考核了一些算例,并对三维QM_6单元的动力性能进行了分析。文中算例表明:本文给出的三维可变节点QM_6单元,不但克服了现有SAP程序中Q_6单元分析空间问题时对不规则网格(畸变单元)不收敛的缺陷,而且与普通等参元相比其抗弯性能和动力性能都有明显改进。
Based on the literature [1], this paper generalizes the QM_6 unit to the three-dimensional 8-20 node isoparametric element, and evaluates some examples based on the engineering practice. The dynamic performance of the three-dimensional QM_6 unit is analyzed. The examples in the paper show that the three-dimensional variable node QM_6 unit given in this paper not only overcomes the defect of non-convergence of irregular grid (distortion unit) when Q_6 element analysis space problem in the existing SAP program is present, but also overcomes the common isoparametric element. Compared to its bending performance and dynamic performance has a significant improvement.