• 论文 •

### 高性能八节点六面体组合杂交元

1. 西北工业大学应用数学系 ;航空计算技术研究所
• 出版日期:2003-03-20 发布日期:2003-03-20

### 8-NODE HEXAHEDRON COMBINED HYBRID ELEMENT WITH HIGH PERFORMANCE

1. Nie Yufeng (Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710072) Zhou Tianxiao (Aeronautical Computing Technique Research Institute, Xi'an 710068)
• Online:2003-03-20 Published:2003-03-20

In this paper, energy compatibility is used to optimize the stress interpolation functions in hybrid scheme, and as a result, two 8-node hexahedron combined hybrid elements with high performance are developed. The numerical experiments show that the presented elements improve the computing accuracy of stress of 8-node isoparametric element greatly, and are insensitive to mesh distortion, locking-free to thickness. To avoid the complex explicit formula of the stress interpolation which being energy compatible to nonconforming displacements, both Lagrangian multiplier method and generalized inverse methods are suggested.
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