波浪作用下软体浮囊动态响应仿真方法研究

漂浮在海上的软体浮囊结构在波浪作用下的动态响应是典型的多相流流固耦合问题。应用多物质ALE有限元方法,对粘性不可压缩流动Navier-Stokes基本方程进行数值求解并追踪材料在单元网格中的流动界面,在水池的一侧使用数值造波机条件生成正向入射波浪。数值实验表明,建立的三维数值波浪水池产生的波浪具有良好的重复性和稳定性。在此基础上,建立了波浪与浮囊结构相互作用的有限元模型。分析了波浪波高的变化对浮囊结构动态响应的影响,为该海上浮囊结构的设计提供了参考依据。

Research on Numerical Simulation of Dynamic Characteristics of Flexible float Structure under Wave

The interaction of the flexible float structure and wave is classical problem about fluid-structure interaction under multiphase flow. Mutil-material ALE method was used to numerically solve the governing equations of viscous incompressible flow and track material surface in mesh. Numerical wave maker was set to generate forward incident wave at the side of the tank. Numerical test shows that waves generating in the present 3-D numerical wave tank are good of repeatability and stability. Using it, the finite element model of the flexible float structure and wave was built. Dynamic characteristics of this structure under the different amplitude of incident wave were compared. Important references were provided for the design of float structure.