Identification method of cross-scale mesh and application in analysis of cutoff wall

被引：0
|
作者：
Yu X. [1 ,2 ]
Lai Y.-P. [2 ]
Wang Y.-K. [2 ]
Qu Y.-Q. [3 ]
Zheng H.-R. [2 ]
机构：
[1] Key Laboratory of Engineering Geophysical Prospecting, Detection of Chinese Geophysical Society, Wuhan
[2] School of Water Conservancy and Civil Engineering, Zhengzhou University, Zhengzhou
[3] School of Hydraulic Engineering, Dalian University of Technology, Dalian
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2023年 / 57卷 / 10期
关键词：
controllability; coupled scaled boundary finite element method-finite element method; cutoff wall of embankment; generation of cross-scale mesh; refined simulation;
D O I：
10.3785/j.issn.1008-973X.2023.10.020
中图分类号：
学科分类号：
摘要：
A cross-scale mesh identification method was presented to efficiently create two-dimensional scaled boundary finite element method-finite element method (SBFEM-FEM) cross-scale coupled meshes. The method combined the artificially controllable characteristics of CAD to identify, cut, and organize graphic line segments generating effective nodes and line segments. A reasonable polygonal-scaled boundary element or finite element was generated based on the topological relationship between the nodes and the line segments and the construction of the closed domain. The nodes and element information were assembled. The two-dimensional SBFEM-FEM cross-scale coupled mesh suitable for numerical analysis was produced. The stress and deformation distribution law and peak value of the wall obtained by different mesh generating methods were compared and studied to verify the validity and calculation accuracy of the generated SBFEM-FEM cross-scale coupling mesh based on a dam project. Results showed that the error of the principal stress obtained by the conventional large-scale finite element mesh simulation could exceed 48%, the error of the results obtained based on the proposed cross-scale fine numerical mesh could not exceed 5%, and the number of mesh elements was greatly reduced. The cross-scale mesh identification method can provide strong support for the anti-seepage structures in dam engineering. © 2023 Zhejiang University. All rights reserved.
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页码：2116 / 2125
页数：9
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