针对新型的大圆筒薄壳结构的复杂动力特性，建立大圆筒结构-土-波浪相互作用的三维非线性有限元模型.通过设定无厚度的接触面单元，来模拟薄壳圆筒-土之间的非线性接触特性；采用土体的非线性本构模型，并同时计入波浪等动荷载的作用对结构进行动力响应分析，得到大圆筒上的x方向及y方向应力分布规律，以及应力随波浪力和埋深的变化规律；最终给出了圆筒结构的应力分布函数式及合理的壁厚尺度.

Based on the complex dynamic characteristics of new shell structure, a 3-D nonlinear finite element model of interaction between large cylinder structure, soil and wave is established. The non-linear contact characteristics between shell structure and soil are simulated by setting contact element of zero thickness. The non-linear constitutive model of soil is used to simulate dynamic response analysis of the structure under the dynamic loads on waves. The distribution of stress in x- and y-directions, the changing law of stress with wave and buried depth are obtained. Finally the stress distribution function and reasonable size of cylinder structure are given.