风机开停过程中海上风电结构振动特性研究

Research on vibration performance of offshore wind power structure in process of unit start and stop

基于现场振动试验,分析了海上风电结构在不同风况下风机开停过程中的振动规律。结果表明:针对试验样机,不同风级开机工况风电结构振幅均比正常运行时更大,范围在11.23%~58.45%;不同风级停机工况风电结构振幅波动剧烈,与正常运行比较变化范围在-25.73%~387.33%。采用STD方法识别出风电结构整体首阶频率为0.33Hz。同时开展了风机塔筒摆幅分析,结果证明该风电结构在开停机过程中能够满足结构安全要求。

Based on site vibration test , the paper analyzed the vibration law of offshore wind power struc-ture in process of unit start and stop .The data show that the vibration amplitude of wind power structure in different work conditions is larger than that in normal running of unit .The range of variation is from 11 . 23%to 58 .45%in start process .The amplitude range is from -25 .73%to 387 .33% compared with that in normal operation in stop process .It used STD method to recognize the first frequency of wind and power structure that is 0.33Hz.At the same time, the paper carried on the analysis of oscillation range of tower .The result showed that wind and power structure can meet the requirement of structure safety .