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Element Functions of Discrete Operator Difference Method

Tian Zhongxu1 Tang Limin2 Liu Zhengxing1
1. Dept. of Eng. Mechanics, Shanghai Jiaotong Univ., Shanghai 200030, China
2.Dept. of Eng. Mechanics, Dalian Univ. Of Technology, Dalian 116024, China

Abstract: the discrete scheme called discrete operator difference for differential equations is given in this paper. Several difference elements for plate bending problems and plane problems are given. by investigating which, the ability of the discrete forms expressing to the element functions is talked about. In discrete operator difference method, the displacements of the elements can be reproduced exactly in the discrete forms whether the displacements are conforming or not. According to this point, discrete operator difference method is a method with good performance.
Key words: discrete operator difference methodelement function reproduce exactly

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