筒型基础负压沉贯流固耦合渗流分析模型

分析筒型基础沉贯作用的土层，利用 流动理论各项同性硬化原理，研究海积软土颗粒本构关系，结合离散元方法计算土体体应变，并将其引入海积软土的物性参数动态计算模型。根据筒型基础沉贯特征，结合体应变以及物性参数动态模型，由有效应力原理和瞬时质量守恒原理分别确定应力和渗流方程，并给出上述模型的定解条件。建立了新的流固耦合渗流的数学模型，求解筒型基础沉贯渗流场分布。

Fluid-soild coupling flow analytical model of bucket foundation suction penetration

The bucket foundation penetrated soil is analyzed. Constitutive relationship of marine soft clay has been studied by using the principle of J2 flow theory and isotropy. The volumetric strain model which is established by combining finite element method is provided to the theoretical model of dynamic physical parameter. According to the characteristic of bucket foundation during suction penetration, combining constitutive relationship and model of dynamic physical parameter, the stress equation is established by principle of effective stress; and the flow equation is established by instantaneous law of conservation of mass. And solvability condition of aforementioned equation is derived. A new mathematic model of fluid-soild coupled flow is established to solve flow field of bucket foundation during suction penetration.