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| A special hole edge element fitted to numerical manifold method for analyzing plates with holes |
| Received:August 03, 2020 Revised:September 15, 2020 |
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| DOI：10.7511/jslx20200803001 |
| KeyWord:Numerical Manifold Method plate with hole two-dimension circular hole problem special manifold element local approximation |
| Author | Institution |
| 武卓威 |
上海交通大学 海洋工程国家重点实验室, 上海 ;上海交通大学 高新船舶与深海开发装备协同中心, 上海 |
| 刘俊 |
上海交通大学 海洋工程国家重点实验室, 上海 ;上海交通大学 高新船舶与深海开发装备协同中心, 上海 |
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| Abstract: |
| When analyzing typical structures with holes using the Finite Element Method(FEM), the inevitable reduction of mesh quality makes it difficult to achieve satisfying calculation precision and efficiency simultaneously.The Numerical Manifold Method (NMM) with two sets of cover systems was used for the analysis of such structures, where special hole-edge manifold elements were applied.These elements were constructed by extending the base of local approximation, referring to the theoretical solution of the benchmark circular hole stress concentration problem.Calculation results of numerical examples with different loads and geometrical characteristics suggest that NMM with the special hole-edge elements achieves higher accuracy and better convergence compared with the FEM, which indicates the advantages of the NMM when analyzing geometrically complex structures, as well as its broad application prospects in the relevant fields. |