新型6MW单柱浮式风力机耦合运动分析  

Motion response analysis of a new 6 MW Spar-type floating offshore wind turbine using coupled simulations

作　　者：周涛 何炎平[1,2,3] 孟龙 赵永生[1,2,3] ZHOU Tao;HE Yan-ping;MENG Long;ZHAO Yong-sheng(State Key Laboratory of Ocean Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE),Shanghai 200240,China;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]高新船舶与深海开发装备协同创新中心(船海协创中心),上海200240 [3]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《浙江大学学报（工学版）》2018年第10期1864-1873,共10页Journal of Zhejiang University：Engineering Science

基　　金：国家"973"重点基础研究发展规划资助项目(2014CB046200)

摘　　要：针对100 m水深条件,设计新型6 MW海上单柱浮式风力机;利用气-液-固-弹性数值模拟软件FAST,对该浮式风力机进行全耦合时域动力响应分析.整个风力机系统的气动力分析采用叶素动量理论,浮式基础的水动力分析基于势流理论同时考虑采用Morison公式计算得到的黏性阻尼,系泊系统采用等效的弹性杆单元.数值仿真结果表明:浮式基础纵荡和纵摇耦合作用较明显;平台运动响应主要取决于风载荷,波浪载荷会改变平台在平衡位置附近的振荡运动;风浪同向会激发较大的运动响应;风浪的夹角越大,平台首摇运动越明显;在额定海况下,环境载荷方向的变化对垂荡运动的影响较小;delta-line能够很好地控制首摇运动,可以避免锚链缠绕现象发生;设计出的6 MW浮式风力机具有良好的总体运动响应,系泊系统设计方案能够保证风力机系统的安全运行.A new 6 MW Spar-type floating offshore wind turbine(FOWT)under 100 meters water depth was developed.Complete dynamic response coupling analysis in time domain was conducted by using aero-hydro-servoelastic simulation code-FAST software.The aerodynamic force analysis of the whole FOWT system was based on the blade element momentum theory.The potential flow theory was applied to the hydrodynamic analysis of floating foundation,in which the viscous damping computed by MORISON formula was implemented.The mooring system adopted equivalent elastic rod model.The numerical simulation results show that the coupling effect between surge and pitch is evident.The platform motion response mainly depends on the wind load,while the wave load changes the oscillating motion of the platform near the equilibrium position.A greater motion response will be stimulated by the same wind and wave direction.The yaw motion of the platform becomes more obvious when the angle between the wind and the wave increases.Changes in environmental loads have little influence on the heave motion under rated sea conditions.Delta-line is a good way to control the yaw motion so as to avoid the phenomenon of mooring line winding.The 6 MW Spar-type FOWT possesses favorable global dynamic performance,and safe operation of the FOWT can be ensured by the mooring system.

关 键 词：海上浮式风力机 运动响应 耦合分析 锚链力 

分 类 号：P753[交通运输工程—港口、海岸及近海工程] TM614[天文地球—海洋科学]