Research On Characteristics Of Offshore Platform In Collision

With the development of ocean exploitation, more and more attention has been paid by people on the offshore platform. Collision performance is an important part of the safety performance for the offshore platform. Domestic and overseas scholars have done a lot of research work on the collision performance of offshore platform. Usually the interaction of fluid and offshore platform is considered in the form of an additional mass, Also does not take into account influence on the performance of the collision of the cable of offshore platform. So that the numerical simulation will be less accurate, With the improvement of computer, Carrying out the research of this aspect is an inevitable trend.The main content of this paper and conclusions are as follows:(1) Establishing 3-d platform model with ANSYS software, meshing the offshore platform and the ship in three dimensions with Hypermesh software, Non-linear FEM software LS-DYNA was adapted to analyze collision damage.(2) A numerical simulation of the vertical collision process between merchant ship bow and semi-submersible offshore platform colum is conducted in a fluid-structure coupling method by using large nonlinear analysis Software LS-DYNA, and access to the main parameters of platform column, such as collision force, structural damage deformation and energy of fluid(3) The collision force and internal energy absorbed of the column are compared between the fluid-structure model and additional mass model.(4) A numerical simulation of the vertical collision process between merchant ship bow and semi-submersible offshore platform colum is conducted without the cable, The main parameters of platform column are compared with the cables exist.