南海张力腿平台涡激运动响应研究

Study on TLP Vortex Induced Motion at South China Sea

张力腿平台(TLP)是一种深吃水的立柱式平台,南海流速特征可诱发其较大的涡激运动,影响立管和张力腿系统的设计。从南海张力腿平台的前端设计项目出发,对涡激运动产生机理、关键特性进行论述。同时,结合拖曳实验,发现TLP平台在与来流垂直的方向上会发生的最大涡激运动响应,且存在锁定区间。研究工作对张力腿平台的工程设计具有借鉴意义。

The tension leg platform（TLP）with its deep draft column piercing into the water,make it more prone to vortex induced motion（VIM）,which will affect the tendon and riser design to a great extent.The platform may subject to VIM at certain flow considering current characteristic at South China Sea.In this paper,the vertex induced mechanism,and the substaintial performances are briefly discussed,combined with model test results during front end engineering design（FEED）,it is found that when current direction is normal to the pontoon with certain speed,a clearly VIM and lock-in phenomenon appeared.The research work in this paper could be seen as reference significance for other projects.