发电技术2024，Vol.45Issue(2)：312-322,11.DOI:10.12096/j.2096-4528.pgt.22153
不同风速对单桩式海上风电机组塔筒动态特性的影响
Research on Dynamic Characteristics of Monopile Offshore Wind Turbine Tower Under Different Wind Speed Conditions
摘要
Abstract
Based on the ANSYS finite element software,the NREL 5 MW monopile offshore wind turbine tower system was modeled in 3D.The influence of different wind speeds on the dynamic characteristics of the tower structure was simulated and analyzed under the full consideration of the soil structure coupling effect and the impeller rotation.The six average wind speeds and the corresponding impeller speeds in the interval between the cut-in wind speed of 3 m/s and the cut-out wind speed of 25 m/s were selected as simulation conditions.The analysis results show that,with the increase of wind speed and impeller speed,the modal frequency of the tower structure gradually increases,and the first two modal frequencies change most obviously.Moreover,the peak value of the tower displacement increases as the wind speed and impeller speed increases,but the amplitude decreases.The displacement shows a non-linear growth trend.The equivalent stress value of the tower increases as the wind speed and impeller speed increases,but the change trend is different from the displacement,which is roughly linear.The fatigue life of the tower decreases sharply,but they are far more than the actual working hours,the fatigue damage and safety factor hazard values are mainly distributed at the bottom of the tower and at the single pile,consistent with the maximum equivalent stress distribution position.关键词
海上风电机组/塔筒/风速/叶轮转速/土构耦合/动态特性Key words
offshore wind turbine/tower/wind speed/blade rotation speed/soil-structure interaction/dynamic characteristics分类
能源与动力引用本文复制引用
樊昂,李录平,刘瑞,欧阳敏南,陈尚年..不同风速对单桩式海上风电机组塔筒动态特性的影响[J].发电技术,2024,45(2):312-322,11.基金项目
国家自然科学基金项目(62173050). Project Supported by National Natural Science Foundation of China(62173050). （62173050）
