同济大学学报（自然科学版）2025，Vol.53Issue(5)：706-715,10.DOI:10.11908/j.issn.0253-374x.24068
深海能源土边界面本构模型在FLAC3D中的植入与应用
Implementation and Application of Bounding Surface Plasticity Model for Methane Hydrate Bearing Sediments via FLAC3D
摘要
Abstract
This paper developed a bounding surface plasticity model for methane hydrate bearing sediments(MHBS)by incorporating a decaying bonding strength variable.Based on the critical state,this model captured the complex mechanical properties of MHBS while considering the coupling of thermo-hydro-mechanic-chemo(THMC)conditions.Additionally,it implemented the boundary surface plasticity constitutive model is implemented into the UDM interface in FLAC3D using a C++compiler,and validated the accuracy of the program through the element numerical test.Based on the numerical simulation,it simulated the wellbore stability and the bearing capacity of MHBS foundation.The results show that the maximum radial displacement of the wellbore increases with the decrease of hydrate saturation and the thermo-hydro-chemical parameters(LMH),and increases with the increase of in-situ stress.Moreover,when the hydrate saturation is 5%,the failure mode of MHBS foundation belongs to the local shear failure.In contrast,the soil failure mode of MHBS foundation belongs to the integral shear failure with a hydrate saturation of 30%.关键词
临界状态/深海能源土/本构模型/FLAC3D/温压化参数Key words
critical state/methane hydrate bearing sediment(MHBS)/constitutive model/FLAC3D/hermo-hydro-chemical parameters分类
土木建筑引用本文复制引用
蒋明镜,赖章坤,李承超,张安,姜朋明..深海能源土边界面本构模型在FLAC3D中的植入与应用[J].同济大学学报（自然科学版）,2025,53(5):706-715,10.基金项目
国家自然科学基金重点项目(52331010) （52331010）
国家自然科学基金重大项目课题(51890911) （51890911）
海南省重点研发计划项目(ZDYF2021SHFZ264) （ZDYF2021SHFZ264）
国家自然科学青年基金(52309139,42302304) （52309139,42302304）
江苏省高校自然科学面上基金项目(22KJB570004) （22KJB570004）
山东省自然科学基金(ZR2022QD017) （ZR2022QD017）
