刚性伞式吸力锚基础（USAF）地基海床土变形拟静力数值分析

NUMERICAL ANALYSIS OF THE FOUNDATION DEFORMATION OF USAF UNDER HORIZONTAL LOADINGS

摘要: 介绍了海上风机新型伞式吸力锚基础（USAF）的结构优势与工作特性，构建了USAF基础有限元模型，通过水平拟静力法数值模拟，重点分析了USAF基础锚体地基海床土的受力变形规律，土体的失效破坏模式，最大剪应力区和锚体的转动中心。最后，将USAF基础与常规单筒吸力锚基础承载模型进行比较，结果表明，伞式吸力锚基础（USAF）具有明显的水平承载优势，伞式吸力锚基础（USAF）在海上风电工程中应用前景广阔。

Abstract: The features of umbrella suction anchor foundation(USAF) are introduced, and the finite element model of USAF is established. Based on numerical simulation results, the foundation deformation of USAF,soil failure mode, the maximum shear stress area and the center of rotation of the anchor body are analyzed emphatically. A comparison has been made between the USAF model and conventional single cylinder suction anchor model and the results show that the umbrella suction anchor foundation(USAF)has obvious advantages in horizontal bearing capacity. It is very application prospect for USAF in offshore wind power engineering.