半潜式钻井平台风载荷CFD预报

在平台设计过程中,海洋平台受到的风载荷是稳性分析与结构设计需要考虑的重要因素。本文采用CFD技术,对某型半潜式钻井平台在作业工况下受到的风载荷进行了预报,分析了湍流模型、风速剖面形式、湍流强度分布等因素对半潜式钻井平台风载荷的影响。结果表明：不同湍流模型对海洋平台风载荷的预报偏差在2%以内,可以忽略湍流模型的影响；风速剖面对风载荷有较大影响,随着风速梯度的增加而增大；湍流强度分布对海洋平台风载荷的影响在6%以内。研究结论可为建立高精度的海洋平台风载荷数值预报方法提供技术支持。

Prediction of wind loads on semi-submersible drilling platform on CFD

The wind loads must be considered during the stability analysis and structure design of ocean engineering structures. In this paper, the wind loads on a Semi-submersible Drilling Unit under NPD wind fields are predicted by CFD method. Meanwhile, the influence of turbulent model, wind velocity profile and turbulent intensity on wind loads results are discussed. It is shown that turbulence model and turbulence intensity have no significant influence on wind loads, but velocity distribution has a big influence on wind loads. The results obtained in this paper could be a support for building high resolution numerical method of wind loads prediction ,which also could be a support for distinguish the importance of uncertainty sources in wind tunnel model tests.