quadrilateral element

For the two-dimensional problem, it can generate triangular element meshes and quadrilateral element mesh; for the three-dimensional problem, it can provide a grid cell including the tetrahedron, hexahedron, pyramid, wedge-shaped body and hybrid grids.

对于二维问题，可生成三角形单元网格和四边形单元网格；对于三维问题，提供的网格单元包括四面体、六面体、棱锥、楔形体及杂交网格等。

Quadrilateral Area Coordinate ( QAC) method is a new tool for developing 2D quadrilateral finite element models which are insensitive to mesh distortion. But this new system can not handle curved-side cases directly.

四边形面积坐标方法是一种构造二维四边形有限元模型的新工具，为解决单元网格畸变敏感问题提供了新途径，但是这种方法还不能直接模拟曲边网格的情况。

A new generalized conforming isoparametric element is formulated to arbitrary irregular quadrilateral for plane stress analysis.

根据线性边界力状态下的广义协调条件,对任意不规则四边形单元构造出一种广义协调等参元.

An Algebraic Multigrid Method of Quadratic Lagrangian Finite Element Equations Under the Unstructured Quadrilateral Grids

求解非结构四边形二次拉格朗日有限元方程的代数多重网格法

The new Quadrilateral Area Coordinate ( QAC) method is a powerful tool to construct 2D finite element models.

四边形面积坐标（QAC）方法是新近提出的构造二维有限元模型的工具。

Based on FEM theory, a program of isoperimetric quadrilateral element is made using MATLAB software.

基于有限元理论, 用MATLAB语言编制了四结点等参元计算机程序.

Isoparametric element of arbitrary quadrilateral plays an important role in finite element analysis.

等参数任意四边形单元在有限元分析中有着重要的作用.

A new refined hybrid quadrilateral plane element is presented for improving the Pian element.

所建立的平面四边形精化杂交元，可以作为对著名的Pian单元的改进。

Two generalized conforming quadrilateral thick plate elements are developed in this paper. A QUADRILATERAL THIN-THICK PLATE BENDING ELEMENT BY USING AREA COORDINATE METHOD

本文构造两个广义协调四边形厚板元ATF-PQ4a和ATF-PQ4b。采用面积坐标的四边形厚薄板通用单元

A Hybrid/ Mixed Quadrilateral Element with Additional Internal Rotary Variables for Plate Bending Analysis

具有附加内转动变量的四边形杂交/混合板元

A new quadrilateral thin plate bending element is presented.

同时讨论了广义协调元的几何不变性,即单元与其节点号编序的相关性问题.