海上浮式风机平台的水动力分析

Hydrodynamic analysis of a spar-type floating offshore wind turbine platform

针对深海海域,设计了适用于深海的新型浮式风机平台,计算了平台在频域内的运动响应,结果表明平台运动的固有频域远离常见波浪频率。计算了平台在时域内工作工况下的运动响应,计算得到了不同工况下风机运动的最大响应值,并且给出建议的风机工作风速区间。计算了平台在极限工况下的运动响应,计算结果表明平台在极限工况下运动响应良好,能够适应恶劣海洋环境。对平台运动响应进行频谱分析,分析表明平台在风和波浪共同作用下的运动可分为与锚链和平台固有频率有关的低频部分和与波浪频率有关的高频部分。

A new spar-type wind turbine platform was designed for deep sea area,and the motion response of the platform was calculated in frequency domain. It is concluded that the natural frequency of platform motion is far away from the common wave frequency. The platform＇s motion response under working condition was calculated in time domain. Through the calculation,the maximum values of the motion response and the suggested cut-in and cut-out wind speed were given. The platform＇ s motion response under extreme sea condition was calculated,it is concluded that the platform behaved well under extreme sea condition,the platform can adapt itself to the harsh marine environment. The spectrum analysis was carried out on motion response,it can be concluded that the platform＇s motion can be divided into a low frequency part related to natural frequency of mooring lines and the platform and a high frequency part related to the wave frequencies.