摘要
针对单桩、三桩、四桩导管架3种常规海上风电基础结构型式动力特性展开研究。以模态分析为基础,获得结构整体固有频率和振型;进而综合运用谐响应分析、瞬态分析、谱分析等方法,对基础结构在简谐荷载、冲击荷载、地震荷载及波浪荷载作用下的动力响应特性进行了数值模拟计算和分析。结果显示:本设计中的单桩、三桩、四桩基础结构刚度依次增大,一阶固有频率递增;对于相同的动力荷载激励,基础结构动力响应递减;基础结构设计中既要保证结构具有足够的刚度以满足荷载作用下的变形控制要求,还要使基础刚度适中以避免共振。为海上风电基础结构动力分析提供了参考。
The dynamic characters of three common foundation frames （monopile,tripod and jacket） for offshore wind turbine are investigated. The natural frequencies and modes of structures are calculated through mode analysis. Harmonic, transient and spectrum analyses are used, and the dynamic responses of the foundational structures under harmonic load, impact load, earthquake load and wave load are simulated and analyzed. It reveals that the first order natural frequencies of the present three foundations （monopile,tripod and jacket） increase with the increasing of their structure stiffness,and their dynamic responses decrease for the same dynamic loads. It is necessary and important to make sure that the foundation stiffness is enough to control the structure deformation and is reasonable to avoid resonance. The research results will supply valuable references for designers and constructors.
出处
《海洋通报》
CAS
CSCD
北大核心
2012年第1期67-73,共7页
Marine Science Bulletin
基金
中国水电顾问集团华东勘测设计研究院院立项课题(KY2010-02-19
KY2011-02-07-02)
关键词
海上风电
动力响应
模态
谐响应
瞬态
谱分析
offshore wind turbines
dynamic response
modal analysis
harmonic response
transient analysis
spectrum analysis
