基于FLAC软件实现非结构化网格拉伸快速建模方法

The Extrusion tool in FLAC3D software enables rapid generation of three-dimensional models by stretching structured grids,but it cannot stretch models containing unstructured grids.Structured grids are typically only suitable for regular-shaped geometries,while irregular geometries are usually represented by unstructured grids,which limits FLAC3D software's modeling capabilities.To address this limitation,this paper utilizes the ability of FLAC2D software to quickly import background files and efficiently construct two-dimensional models.It transforms and translates the node information,element information,and grouping information in FLAC2D model files,calculates the node information,element information,and grouping information of the stretched three-dimensional model,and develops an interface program from AutoCAD-FLAC2D-FLAC3D using the C language based on FLAC3D model file encoding rules.This enables rapid modeling from complex two-dimensional profiles to FLAC3D pseudo-three-dimensional models.The method not only provides a feasible solution for importing FLAC2D model files into FLAC3D model files but also realizes rapid stretching modeling of unstructured networks based on FLAC software,thereby expanding the modeling capabilities and application range of FLAC3D and improving modeling efficiency.