饱和多孔介质中准静态大变形问题的水力耦合ABAQUS-PFEM计算框架OA

The numerical calculation of coupled hydro-mechanical problems is a significant challenge in geo-mechanics.General-purpose finite element(FE)software is predominantly restricted to small-strain analysis when solving such problems,making it difficult to directly apply to large deformation problems.Therefore,an efficient computational framework based on the particle finite element method(PFEM)was constructed.This framework utilized Python scripts to develop core PFEM modules,including Alpha-Shape-based bound-ary recognition,Laplacian smoothing for mesh optimization,and state variable mapping based on the inverse distance weighting(IDW)algorithm.Through the secondary development of the ABAQUS software,the ABAQUS solution for hydro-mechanical coupled PFEM was realized.It was validated against benchmark cases including one-dimensional consolidation and strip footing,and applied to the analysis of submarine pipeline-soil interaction problems.The results demonstrate the proposed framework achieves good numerical accuracy and stability for quasi-static large-deformation problems in saturated porous media,providing an effi-cient and feasible new pathway for solving complex coupled problems.