CONSISTENT HYDRO-STRUCTURE INTERFACE FOR EVALUATION OF GLOBAL STRUCTURAL RESPONSES IN LINEAR SEAKEEPING

摘要

As far as the linear seakeeping analysis is concerned, the fully consistent transfer of hydrodynamic loading from hydrody-namic model to the 3D FEM structural model is never perfect, even if the two meshes coincide. However, depending on the method of pressure transfer, the coupling can be more or less efficient/consistent. The main difficulty lies in the fact that two meshes (hydro and structural) are usually very different, which ends up with the unbalanced structural model if the coupling procedure is not correctly performed. In this paper we presented two methods which both lead to completely equilibrated structural model. They can easily be adapted to any of the structural FEM packages.