摘要
海上风机导管架基础在受台风影响下,使海底土床弱化的荷载影响上部风机,因此研究在不同桩土弱化程度下导管架基础风机的频率变化、静动力响应具有重要意义。文中以福建某海上风电场4.0MW风机为原型建立导管架基础海上风机三维有限元数值模型,研究在不同弱化程度下海上风机的自振频率、动力特性等一系列问题。研究发现,随着桩土弱化程度的增加,风机结构的整体动力响应会随之增大,但增大的幅度有限。
The upper structure of wind turbine will be affected when the offshore wind turbine jacket foundation is subjected to loads that weaken the seabed soil bed,such as typhoon,Therefore,it is of great significance to study the frequency variation and static and dynamic response of the wind turbine with jacket base under different pile-soil equivalent weakening degrees.In this paper,a three-dimensional finite element numerical model of a 4.0MW Shanghai Electric SWT-4.0-130 wind turbine in an offshore wind farm in Fujian was established,and a series of problems such as natural vibration frequency and dynamic characteristics of the offshore wind turbine under different equivalent weakening degrees were studied.Finally,the results showed that the overall dynamic response of the wind turbine structure increased with the increase of the weakening degree of pile and soil,but the increase range was limited.
作者
李亦泽
周文杰
李威
LI Yize;ZHOU Wenjie;LI Wei(Zhejiang University,Hangzhou310000,China)
出处
《低温建筑技术》
2021年第8期127-130,共4页
Low Temperature Architecture Technology
关键词
桩土弱化
循环荷载
自振频率
动力响应
weakening of pile-soil
cyclic load
natural frequency
the dynamic response
