基于GIS的边坡有限元网格自动生成研究  

The Method of Automatically Generating FEM Based on GIS for the Slope

作　　者：徐帮树[1] 徐建华[1] 芮建勋[1] 王强[1] 

机构地区：[1]华东师范大学地理信息科学教育部重点实验室,上海200062

出　　处：《地理与地理信息科学》2005年第3期23-25,29,共4页Geography and Geo-Information Science

摘　　要：GIS已广泛运用于滑坡灾害研究,但GIS和数值方法相结合研究边坡问题的文献很少。原因在于边坡失稳和滑坡形成是复杂的三维空间物理力学过程,而三维空间数据模型理论还不成熟。因此,在现有GIS软件平台上实现大区域滑坡灾害数值模拟的关键在于三维有限元网格的自动生成。该文研究边坡岩土数值分析相关数据的GIS数据存储格式,提出基于栅格的六面体有限元网格生成和基于TIN的三棱柱有限元网格生成,并利用ArcGIS9 0、Ansys7 0实现有限元网格自动生成。GIS is widely used in the research of landslide hazard,but the literature that studies landslide hazard with the conjunction of GIS and numerical method is very less because the slope problem is the complicated physics-chemic process and the theory of 3D data model is immature.The key technique for the landslide hazard in the larger scale region simulated based on GIS is the automatical generating of 3D FEM.The paper studies the GIS-based data format for the slope numerical analysis and presents generating methods based on TIN and grid respectively.The automatic generating program is developed with the tools of ArcGIS 9.0 and Ansys 7.0.This paper will promote the application of GIS for the slope model and utilize the capability of GIS data management and operation to increase the precision of the slope FEM.

关 键 词：网格自动生成 GIS 有限元网格生成 三维有限元网格 三维空间数据 数据存储格式 灾害研究 数值方法 力学过程 空间物理 边坡失稳 模型理论 数值模拟 滑坡灾害 软件平台 相关数据 数值分析 大区域 三棱柱 TIN 六面体 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TB115[自动化与计算机技术—计算机科学与技术]