15. There is no explicit formulation of inverse mapping about the isoparametric element, so inverse mapping is avoided in finite element analysis.
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。
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16. The key of plotting colored patterns of high order isoparametric elements is to calculate the nature coordinates of pixels spanned by elements.
画高次等参单元彩色云图的关键是计算单元覆盖像素的自然坐标。
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17. Methods A three-dimensional finite element model of the nasomaxillary complex was created, consisting of 1638 isoparametric elements and 1827 nodes.
方法采用三维有限元法测量受不同方向的后牵引力的鼻上颌复合体三维有限元模型。
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18. Numerical results coincide with theoretical analysis. That the modified isoparametric element displays a lot of better characteristics is also shown here.
数值结果与理论分析一致，并展示了修改等参元的许多优良特性。
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19. The correlation between compatible and incompatible isoparametric elements was proved by applying some restrictions to the generalized degrees of freedom.
并通过对广义自由度施加一定约束，证明了协调等参元与非协调元之间存在的对应性。
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20. The convergence of hexahedral isoparametric element of form (2) is analysed in this paper, then the optical interpolation error estimation of it is obtained.
研究了(2)型等参六面体元，分析了其收敛性并给出了最优插值误差估计。
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21. In this paper, the boundary element method for calculating surface crack is studied and suitable location or the singular isoparametric elements, is presented.
本文研究了计算半随圆表面裂纹应力强度因子的边界元方法。
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22. In this paper, comprehensive theoretical and experimental study have been carried out on GB1236—85 acoustics cavity. A twenty node isoparametric element is developed.
23. In this paper, the isoparametric elements method based on the theoretical foundation of using two scalar potentials to calculate 3d magnetostatic field is introduced.
本文以双标量位法计算三维恒定磁场为理论基础，引入等参元有限元法。
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24. The calculation on typical examples by 20-node isoparametric elements show the results obtained from these two methods have good accuracy and coincide with each other.
利用20节点等参单元对典型例题所作的计算表明，两种方法的结果均有较好的精度，并且互相比较吻合。
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25. 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。
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26. 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.
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。
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27. Functional graded material is a new material. Isoparametric graded finite elements are used for building the corresponding model for functional graded material in this paper.
针对功能梯度材料这种新型材料，提出了采用等参梯度元建立有限元模型的方法。
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28. An isoparametric finite element program of large elastic-plastic strain (LEPS) is used to analyse the necking of a cylindrical bar and a plate specimen under uniaxial tension.
29. By using 3-d isoparametric element, the global stiffness matrix equation for the piezoelectric laminate is obtained on the bases of minimum principle of total potential energy.
由于最小势能原理，建立了单元刚度矩阵和压电材料的整体刚度方程。
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30. Secondly, the global coordinates and stress values of the points are calculated by using standard isoparametric interpolations, the node coordinates and the known node stresses.
