水利学报2026，Vol.57Issue(7)：1052-1065,14.DOI:10.3724/j.slxb.20250763
考虑坝基复杂地形的堆石坝三维有限元网格自适应生成方法
Adaptive generation method for 3D finite element mesh of rockfill dams with complex dam foundation topography
刘全 1孟歆 1王浩 1张宏阳 1张小蕾 1庞小荣2
作者信息
- 1. 武汉大学 水工程科学研究院,湖北 武汉 430072||武汉大学 水资源工程与调度全国重点实验室,湖北 武汉 430072
- 2. 武汉大学 水资源工程与调度全国重点实验室,湖北 武汉 430072
- 折叠
摘要
Abstract
To address the key problems in 3D finite element mesh generation for rockfill dams with complex dam foundation topography—such as difficulties in fitting the boundaries between different material zones and filling stages,controlling the meshes of the transition zone between the dam body and foundation,and accurately represent-ing the excavation boundaries—an adaptive 3D finite element mesh generation method for rockfill dams is proposed.The method employs element transformation to adaptively fit complex boundaries of material zones and filling stages.A transition factor for the meshes of the dam body and foundation is constructed using fractal theory to control the rate of element size variation and adaptively generate the foundation transition zone.A rigorous terrain cutting surface fit-ting algorithm for 3D meshes is developed based on a chained dimension-reduction scheme of"body-face-edge-vertex",enabling the generation of a 3D dam foundation mesh that accurately reflects the excavation surface.Statisti-cal analyses of mesh quality indicators—including aspect ratio,parallel deviation,maximum angle,and Jacobian ratio—for the 3D meshes of five dams generated using this method demonstrate that the method is featured by control-lable overall mesh quality meeting the shape quality requirements for subsequent finite element analysis,and signifi-cantly improved efficiency of 3D modeling.This method enables adaptive generation of rockfill-dam finite element meshes from 2D maximum cross sections to 3D finite element models,providing an efficient and reliable preprocess-ing approach for refined numerical simulation of rockfill dam body-foundation systems with complex dam foundation topography.关键词
材料分区/填筑分期/坝基复杂地形/单元变换/分形理论/堆石坝/有限元网格生成Key words
material zoning/staged dam filling/complex dam foundation topography/element transformation/frac-tal theory/rockfill dam/finite element mesh generation分类
建筑与水利引用本文复制引用
刘全,孟歆,王浩,张宏阳,张小蕾,庞小荣..考虑坝基复杂地形的堆石坝三维有限元网格自适应生成方法[J].水利学报,2026,57(7):1052-1065,14.
