大型漂浮式风机塔架系统固有频率快速评估方法  

A rapid assessment method of natural frequencies of large floating wind turbine tower systems

作　　者：王月 程正顺[1,2] 崔明浩 杨灿 陈鹏[1,2] WANG Yue;CHENG Zhengshun;CUI Minghao;YANG Can;CHEN Peng(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;SJTU Yazhou Bay Institute of Deepsea Sci-Tech,Sanya 572000,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]上海交通大学三亚崖州湾深海科技研究院,海南三亚572000

出　　处：《海洋工程》2024年第4期35-43,共9页The Ocean Engineering

基　　金：国家自然科学基金资助项目(42176210,52201330);海南省自然科学基金联合资助项目(2021JJLH0018)。

摘　　要：漂浮式风机塔架为细长高耸柔性结构,受风、浪、风轮旋转等多源复杂激励作用,塔架固有频率和模态的准确评估是漂浮式风机系统设计的关键环节。针对当前漂浮式风机塔架的模态分析大多基于塔底固定假设,未考虑浮式基础和风机正常作业的影响。提出了一种准确高效的大型漂浮式风机塔架固有频率快速评估方法,分析了漂浮式风机塔架固有频率的变化特性及规律。结果表明:当风机处于停机状态时,塔底固定的简化模型得出的塔架固有频率存在约10%的偏差,塔架固有频率评估需考虑浮式基础的影响;当风机处于运转状态时,上部风轮气动附加质量效应导致塔架的固有频率略有减小。研究结果可为漂浮式风机塔架以及控制策略的设计提供参考。Tower of a floating wind turbine is a high-rise and slender flexible structure excited by wind,wave,turbine rotation and other complex excitation sources.A rapid evaluation of the natural frequency and mode of the tower is the key to the design of floating wind turbine system.In view of the current situation that the modal analysis of floating wind turbine tower is mostly based on the assumption of fixed tower bottom and does not consider the influence of floating foundation and operation of the wind turbine,an accurate and efficient evaluation method of natural frequency of large floating wind turbine towers is proposed.The variation characteristics and rules of natural frequency of floating wind turbine towers are studied.The results indicate that when the wind turbine is parked,there is a deviation of about 10%in the natural frequency of the tower obtained from the simplified model of the fixed bottom.The influence of floating foundation should be considered in the evaluation of the natural frequency of the tower.The natural frequency of tower slightly decreases when considering the effect of the upper rotor aerodynamic added mass when the wind turbine is in operation.The results can provide a reference for the design of floating wind turbine towers and control strategy.

关 键 词：漂浮式风机 塔架 固有频率 频域计算方法 气动附加质量 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]