中文摘要：

为加强强度折减有限元法在海底斜坡稳定性研究中的应用,以＂荔湾3-1气田不良地质的风险评价＂项目为工程背景,运用有限元软件ABAQUS二次开发得到的边坡稳定性分析模型对海底斜坡稳定性进行评价,并在此基础上探讨了各土体性质参数对海底斜坡稳定性的影响。该二次开发模块操作简便、计算准确,自动搜索安全系数精度高。计算结果表明海底斜坡坡度、土体不排水强度、摩擦角对海床稳定性影响较大,土体密度影响不大。

英文摘要：

In order to strengthen the application of strength reduction method in submarine landslide analysis,the finite element model from the secondary development of software ABAQUS is used to analyze and evaluated the stability of submarine slopes based on the project of ＂Liwan 3-1 gas field＇s adverse geology risk evaluation＂,and then on this basis,a lot of changes on the parameters are made to search the nature of seabed slope stability and impact of soil properties on seabed slope stability.This secondary development module is simple in operation,accurate in calculation and precise in safety factor.The calculation results show that the submarine slope gradient,soil friction angle and undrained shear strength would play a decisive role in the stability of submarine slope,but the soil density would have little effect in that.