Three-dimensional rigid-plastic finite elements, elastic finite elements and influential function method for the analysis of deformation of rolls system are combined.

它耦合了三维刚塑性有限元法，弹性有限元法和计算辊系变形的影响函数方法。

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The finite element analysis of three-dimensional steady-state convection-diffusion equation is given by using 4-node tetrahedral elements and 8-node hexahedral elements.

采用四结点四面体单元和八结点六面体等参数单元进行三维定常对流扩散方程的有限元分析。

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The three dimensional finite element method models of the mandibular first molar was constructed on the computer, which had 63715 nodes and 41676 tetrahedrons elements.

在计算机上建立了下颌第一磨牙三维有限元模型，总节点为63 715个，4面单元数为41 676个。

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