FLAC3D复杂网格模型的构建及其工程应用

FLAC^(3D) Complex Grid Model Construction and Its Engineering Application

借助通用有限元软件ANSYS在复杂网格模型建立方面的优势,通过开发的数据接口软件,实现了复杂地质体网格模型在ANSYS中建立并导入FLAC3D中的目的,有效降低了FLAC3D复杂网格模型建立的难度。采用该方法建模时,先通过地质建模软件GOCAD获取等高线的三维坐标数据,然后将这些数据输入图形处理软件SURFER整理后输出为等间距的点坐标,接着采用这些点在ANSYS中生成等间距样条曲线并最终建立实体模型并网格剖分,尔后通过接口程序将ANSYS中的网格模型导入FLAC3D以实现复杂岩土工程的计算分析。最后以西南某一水电站厂房边坡网格模型的建立为例,说明了该方法既实用又高效。

By means of advantage of general finite element analysis software ANSYS in build complex grid model,the objective to build a grid model for complex geologic body by ANSYS and import it into FLAC3D via a data interface program developed is implemented.The difficulty of building complex grid model for FLAC3D is effectively reduced consequently.In the modeling process,the three-dimensional coordinates of contour is obtained firstly via GOCAD,and these three-dimensional coordinates are input into SURFER and a series of equidistant three-dimensional coordinates is output.Then these equidistant three-dimensional coordinates are input into ANSYS,which generate a set of equidistant spline curves to build a entity model for complex geologic body.Finally,the entity model is built and imported to FLAC3D via the data interface program to perform complex geotechnical engineering computational analysis.The grid model for a hydropower station power house slope in southwest China is illustrated to show the utility and efficiency of the approach presented.