波浪载荷及气动力引起的半潜浮式风机疲劳损伤分析  

Fatigue damage of semi-submersible floating wind turbine caused by wave load and aerodynamic forces

作　　者：冯士伦[1,2] 杨虎 唐友刚[1,2] 李焱[1,2] FENG Shilun;YANG Hu;TANG Yougang;LI Yan(School of Civil Engineering,Tianjin University,Tianjin 300350,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]天津大学水利工程仿真与安全国家重点实验室,天津300350

出　　处：《海洋工程》2022年第5期19-27,共9页The Ocean Engineering

基　　金：国家自然科学基金资助项目(51879188,52001230);中国博士后科学基金资助项目(2021T140506,2019M651042);上海交通大学海洋工程国家重点实验室开放基金资助项目(GKZD010081)。

摘　　要：研究浅水半潜式大功率浮式风力机波浪载荷和气动力引起的基础结构疲劳损伤,揭示基础结构的疲劳损伤机理。采用谱疲劳损伤计算分析方法,以10 MW风力机为例,计算波浪载荷引起的热点应力及多种海况引起的疲劳损伤。采用叶素动量理论并基于所在海域的风速分布,计算叶轮转动引起的气动力及其引起的疲劳损伤。计算结果表明,对于半潜式三立柱浮式风力机,波浪载荷引起的基础结构应力远大于气动力引起的基础结构应力,基础结构损伤主要是由波浪载荷引起,气动力引起的浮式基础结构的损伤为10^(-3)量级,而波浪载荷引起的损伤为10^(-1)量级。We studied the fatigue damage of the foundation structure caused by wave loads and aerodynamic forces when high-power semi-submersible floating wind turbines worked in the shallow water,and revealed the fatigue damage mechanism of the foundation structure.The hotspot stress induced by the wave loads were calculated and the fatigue damage under sea conditions was analyzed by using the spectrum fatigue damage method for 10 MW wind turbine.Based on the wind speed distribution in the sea area,the aerodynamic forces and the fatigue damage were calculated by using the Blade Element momentum theory.The results show that the foundation structure stress caused by wave load is much greater than the foundation structure stress caused by aerodynamic forces.The damage of the foundation structure is mainly caused by wave load,and the damage caused by aerodynamic forces is of the order of 10^(-3),while the damage caused by the wave load is of the order of 10^(-1).

关 键 词：疲劳损伤 叶素动量理论 S-N曲线 浮式风机 气动力 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] TK8[天文地球—海洋科学]