由于等参元不存在逆变换的显式，所以在有限元分析的列式中都回避等参元逆变换。
There is no explicit formulation of inverse mapping about the isoparametric element, so inverse mapping is avoided in finite element analysis.
本文证明了直边八节点修改等参元的等参坐标变换与单元附加节点的总体配置无关；
It is shown in this paper that the isoparametric coordinate transformation is independent of the lacotion of the additional nodes for straight-side eight-node modified isoparametric element.
二次细分网格位移边界值采用等参逆变换法由一次网格的计算结果插值得到。
The displacement boundary values of the small model use the results of the large model, which are obtained by interpolating with numerical inverse isoparametric mapping.
第四章首先阐述了三角形网格的划分方法，其中用到了二维等参元变换。
The fourth chapter introduces the method of triangle cell division, 2D equivalent parameter commutation is adopted.
在证明线性等参单元的一个几何特性的基础上，提出了线性等参单元逆变换的几何二分法。
Geometric dichotomy method is innovated and used for inverse isoparametric mapping in linear finite element, of which a property is proved and served as the foundation.
在证明线性等参单元的一个几何特性的基础上，提出了线性等参单元逆变换的几何二分法。
Geometric dichotomy method is innovated and used for inverse isoparametric mapping in linear finite element, of which a property is proved and served as the foundation.
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