系泊缆断裂对新型半潜型浮式风力机动力响应特性的影响  

Effects of Mooring Failure on the Dynamic Responses of a New-type Semi-submersible FOWT

作　　者：冷述栋 尹勇 王叶 陈帅 唐友刚[4] 李焱[4] LENG Shudong;YIN Yong;WANG Ye;CHEN Shuai;TANG Yougang;LI Yan(China Ship Design and Research Center,Dalian 116001,China;School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China;CSIC Haizhuang Wind Power Company Limited,Chongqing 401123,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]中船重工船舶设计研究中心有限公司,辽宁大连116001 [2]大连理工大学能源与动力学院,辽宁大连116024 [3]中国船舶集团海装风电股份有限公司,重庆401123 [4]天津大学建筑工程学院,天津300350

出　　处：《船舶与海洋工程》2022年第6期5-11,共7页Naval Architecture and Ocean Engineering

基　　金：国家自然科学基金(No.52001230);中国博士后科学基金(No.2019M651042,No.2021T140506);上海交通大学海洋工程国家重点实验室开放基金(No.GKZD010081);天津市自然科学基金资助项目(21JCQNJC00330)。

摘　　要：以NREL 5 MW海上风力机为研究对象,提出一种新型半潜型浮式风力机。以该风力机为研究对象,考虑系统受到的气动力、水动力和系泊力相互耦合的作用,建立气动-水动-结构-系泊一体化动力学模型。采用悬链线式多点系泊方式,利用基于有限元理论的非线性系泊缆动力方法对系泊系统的静刚度进行分析。考虑风力机正常作业时单根系泊缆因外界异物碰撞而突然断裂的情况,开展时域动力响应分析。计算结果表明:在额定风速和额定海况下,风力机的系缆张力和基础的运动性能良好;当单根系泊缆出现破断情况时,系泊系统满足设计要求;断缆状态对系缆张力和风力机的平动运动响应的影响较大,对风力机的摇摆运动的影响并不显著。A new-type of semi-submersible floating foundation is proposed based on NREL 5 MW offshore wind turbine, and the semi-submersible floating offshore wind turbine(FOWT) is taken as the research object to establish a coupled aero-hydro-structural-mooring dynamics model in considering the coupling effects among the aerodynamic load, the hydrodynamic load and the mooring load. The multi-point catenary mooring lines are adopted for the mooring system, and the static mooring stiffness is analyzed with the finite element method based on the nonlinear algorithm to simulate the dynamic responses of mooring lines. As single mooring line would be broken by external collision during the normal operation of the FOWT, the time-domain dynamic response analysis is performed. The results show that the FOWT has good mooring load and motion performance under the rated wind speed and sea state. Even if one mooring line was broken, the remaining mooring system would still meet the design requirement. It has little effect on the rotational motions of the foundation though the mooring failure will largely influence the mooring tension and translational motions of the floating foundation.

关 键 词：半潜型浮式风力机 悬链线式系泊 动力响应 系泊缆失效 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] U661.1[交通运输工程—船舶及航道工程]