基于有限元法的漂浮式风力机Spar平台动态响应分析  

Dynamic response analysis of floating wind turbine spar platform based on finite element method

作　　者：周国龙[1] 叶舟[1] 成欣[1] 李春[1] ZHOU Guolong YE Zhou CHENG Xin LI Chun(School of Energy and Power Engineering/Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, Chin)

机构地区：[1]上海理工大学能源与动力工程学院/上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《能源研究与信息》2016年第3期131-137,共7页Energy Research and Information

基　　金：国家自然科学基金资助项目(51176129;51676131);上海市教育委员会科研创新资助项目(13YZ066)

摘　　要：以美国可再生能源实验室(NREL)的5 MW漂浮式风力机和Spar平台为参考模型,采用有限元分析法分析了Spar平台的波浪载荷频域特性,包括对振幅响应算子、绕射力和F-K力频域动态响应分析,并对比了三种波浪谱(P-M谱、JONSWAP谱和Wen’s谱)海况下的时域响应.结果表明:Spar平台载荷峰值出现在低频波浪作用下,且响应明显,而随着频率的增大,其值逐渐减小;在P-M谱和Wen’s谱作用下的平台动态响应无明显差异,且两者的振幅和周期大致相同,而在JONSWAP谱作用下的平台动态响应最小,但其往复周期小,频率大,使得系泊系统承受较大的周期性张力.According to reference models of Spar platform and NREL 5 MW offshore wind turbine, the finite element analysis was used to analyze the wave loads frequency domain characteristics of Spar platform, including response amplitude operators（RAOs）, diffraction force, and F-K force. In addition, the time domain responses under the sea states with three wave spectra （P-M spectrum, JONSWAP spectrum, and Wen＇s spectrum） were also compared. It could be concluded that the peak load of Spar platform appeared with low frequency waves and its value decreased with the increasing of wave frequency. The amplitude and period of platform dynamic responses exhibited no obvious differences between P-M spectrum and Wen＇ s spectrum. The minimum dynamic response was observed when JONSWAP spectrum was employed. However, it experienced higher reciprocation frequency with smaller period under this condition and resulted in higher periodical tension of mooring system.

关 键 词：漂浮式风力机 SPAR平台 动态响应 有限元 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]