等参双线性插值的应力佳点

Optimal Stress Points of IsoparametricBilinear Interpolation

本文研究了等参双线性插值的应力佳点问题，并指出如果多边形区域被双对半剖分的方法分成小四边形单元，则等参双线性插值在单元的四个顶点及四边中点上具有超收敛的性质。

This paper studied the optimal stress points of isoparametric bilinear interpolation and pointed out that the isoparametric bilinear interpolation on the four corners and the four midpoints of edges of elements is of superconvergence property if the polygon area is divided into small quadrilateral units by the bi section scheme