摘要
提出一种简化处理桩-土相互作用的方法,并基于此针对现有的5 MW海装风机结构,建立用于研究的WT 5MW海上风机结构,模拟风机上部结构包括机舱、叶片、轮毂等组件,确定风机基础结构的设计工况和相关水文参数,采用FAST软件开展风机荷载计算,并利用SACS建立WT 5 MW整体结构有限元模型,开展多年平均水位下的WT 5 MW风机结构动力特性分析。结果表明,WT 5 MW风机结构的基频为0.321Hz,处于允许频率范围内,与NREL 5MW基频基本一致,可印证桩-土相互作用简化处理方法的有效性。
A simplified method to deal with pile-soil interaction is presented.In view of the existing NREL 5 MW offshore wind turbine structure,the WT 5 MW offshore wind turbine structure used for the research is established.The superstructures of the wind turbine are simulated,including engine room,blade,hub and other components.The design conditions and relevant hydrological parameters of the wind turbine infrastructure are determined.The wind turbine load calculation is carried out by FAST and the finite element model of the whole structure of WT 5 MW is established by SACS.The dynamic characteristic analysis of WT 5 MW wind turbine structure under the average annual water level is carried out.The results show that the fundamental frequency of the WT 5 MW wind turbine is 0.321 Hz which is within the allowable frequency range and is basically consistent with the fundamental frequency of NREL 5 MW.The effectiveness of simplified treatment method for pile-soil interaction is verified.
引文
[1]薛桁,朱瑞兆,杨振斌,等.中国风能资源贮量估算[J].太阳能学报,2001(02):167-170.
[2]刘建军.海上风电机组整体桁架式支撑结构动力特性与疲劳研究[D].青岛:中国海洋大学,2010.
[3]郇彩云,姜贞强,罗金平.桩土相互作用模拟方法对海上风机整体结构模态分析的影响[J].水电能源科学,2013,31(01):236-238.
[4]李益,张宏战,马震岳.基于土-结构相互作用的海上风机模态分析[J].水电与新能源,2013(01):70-73.
[5]丁明华.大型海上风机结构系统的动力特性研究[D].大连:大连理工大学,2011.
[6]郭健,杨敏,王伟.海上风机高桩承台基础模态建模分析研究[J].岩土工程学报,2013,35(S2):1172-1175.
[7]刘岩.一种新型离岸风机基础的分析与应用[D].哈尔滨:哈尔滨工程大学,2015.
[8] MARTIN O L H.Aerodynamics of Wind Turbines[M].2nd ed.London:Earthscan,2008.