自升式平台桩腿海上对接过程中的碰撞问题

碰撞现象在海上作业中时有发生,给人员和财产安全带来极大威胁。本文基于非线性有限元理论,研究自升式平台桩腿吊装过程中浮吊船与平台的碰撞问题以及桩腿移动就位时对平台上层建筑的碰撞问题；分析撞击过程中平台的变形与应力变化及结构失效等情况,给出使平台不同区域发生破坏的临界碰撞速度；给出了浮吊船在就位过程中的安装制动距离以及移动过程中与上层建筑间的安全距离和移动速度限制,为桩腿海上吊装作业方案设计提供参考。

Research on the Collision Problem of the Legs of Jack-Up Platform during Docking on the Sea

Collision phenomena occur frequently in maritime operation, which poses a great threat to the safety of personnel and property. This paper bases on nonlinear finite element theory, studying on the collision problem of floating crane and platform in the process of jack-up platform legs lifting and the collision between the legs and superstructure of the platform when the legs move in place; taking the analysis of the deformation, stress and structural failure of the platform during the impact process and the critical collision velocity is given; given the safe brake distance of floating crane in the place and the safe distance of leg lifting to the superstructure of platform in the process of moving and the moving speed limiting, it provides reference for the design of offshore lifting operation scheme of pile legs.