浅水浮式风电结构非线性波浪荷载及动力响应特性研究  

Study on the nonlinear wave load effect and dynamic response characteristics of floating wind turbine structures in shallow water

作　　者：张敏[1] 杨天恩 杨风艳[2] 徐琨 ZHANG Min;YANG Tianen;YANG Fengyan;XU Kun(College of Engineering,Ocean University of China,Qingdao 266100,China;Offshore Oil Engineering(Qingdao)Co.,Ltd,Qingdao 266520,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]海洋石油工程(青岛)有限公司,山东青岛266520

出　　处：《哈尔滨工程大学学报》2024年第6期1041-1049,共9页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51879247,52171281)。

摘　　要：浮式风电结构在浅水海域中承受的波浪荷载及运动响应表现出非线性特征,对浮式风电安全性提出很高要求。本文建立了风机-浮式基础-系泊系统耦合分析模型,对于不同水深、不同波浪荷载计算方法下的频域水动力系数和时域计算结果分别进行了对比,讨论了水深以及波浪荷载计算方法对浮式风电结构响应和系泊张力的影响。结果表明:浮式风电结构的水动力性能和动力响应随水深变化显著。水深较浅时,浮体响应和系泊张力的低频部分明显增大,二阶波浪荷载的影响更加显著。同时,Newman近似方法与全二次传递函数方法相比,在浅水条件下会明显低估二阶波浪荷载效应,进而影响平台响应和系泊张力的分析。The wave load and motion response of floating wind turbine structures in shallow water exhibit nonlinear characteristics,which highly demand the safety of floating wind turbines.Herein,the coupling analysis model of the wind turbine-floating foundation-mooring system is established,the hydrodynamic coefficient of the frequency domain and calculation results of the time domain under different water depths and wave load calculation methods are compared,and the influence of water depth and wave load calculation methods on the structural response and mooring tension of floating wind turbine structures are discussed.The results showed that the hydrodynamic performance and dynamic response of floating wind turbine structures change with variations in water depth.The low-frequency component of floating platform response and mooring line tension increases with decreasing water depth,and the second-order wave load effect becomes more significant in shallow water.Meanwhile,Newman′s approximation underestimates the second-order wave loads compared with the full quadratic transfer function method,which affects the analysis of platform response and mooring tension.

关 键 词：海上风电场 浮式风机 水动力 非线性分析 动力响应 系泊缆 时域分析 频域分析 

分 类 号：TM614[电气工程—电力系统及自动化]