不同风速对单桩式海上风电机组塔筒动态特性的影响
摘要：基于ANSYS有限元软件对NREL 5 MW单桩式海上风电机组塔筒系统进行三维实体建模，在考虑土构耦合与叶轮旋转作用下，模拟分析不同风速对塔筒结构动态响应特性的影响。选取机组切入风速3 m/s与切出风速25 m/s区间内6种平均风速及与之对应的叶轮转速作为模拟工况，分析结果表明：随着风速和叶轮转速的增加，塔筒结构的模态频率逐渐增大，前两阶模态频率变化最为明显；塔筒位移量峰值增大，但增幅减小，位移量呈非线性增长趋势；塔筒等效应力值随之增大，但变化趋势与位移量不同，大致为线性增长；塔筒疲劳寿命急剧下降，但都远超实际工作时长，疲劳损伤与安全系数危险值主要分布在塔筒底部与单桩处，与最大等效应力分布位置吻合。
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.
标题：不同风速对单桩式海上风电机组塔筒动态特性的影响
title:Research on Dynamic Characteristics of Monopile Offshore Wind Turbine Tower Under Different Wind Speed Conditions
作者：樊昂, 李录平, 刘瑞, 欧阳敏南, 陈尚年
authors:Ang FAN, Luping LI, Rui LIU, Minnan OUYANG, Shangnian CHEN
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,
keywords:offshore wind turbine,tower,wind speed,blade rotation speed,soil-structure interaction,dynamic characteristics,
发表日期：2024-04-30
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