摘要
近海风电机组基础较多采用圆柱高桩混凝土承台结构,潮汐水动力作用可能激励风机-塔架-基础桩高耸结构的振动而影响安全,该文通过水力学模型试验研究8圆柱基础桩群潮汐水动力脉动特性。结果表明:脉动压力可视作平稳的随机过程,时域幅值特征表现出与单圆柱差异较大的特点,频域能量特征揭示了水流的脉动主频和旋涡脱落频率。
An offshore wind generator usually adopts a high-level concrete platform supported on cylinder piles.Thus,a tidal hydrodynamic force may result in the vibration of the high structure of a generator-tower foundation,and threaten its security.This article studies tidal flow fluctuating pressure properties of an eight-cylinder-pile group foundation through a hydraulic model test.The results show that the fluctuating pressure can be regarded as a stationary random process;the time domain amplitude characteristics display many differences with a single cylinder;in frequency domain,the energy characteristics reveal the major frequency of flow fluctuating and the vortex shedding frequency.
出处
《工程力学》
EI
CSCD
北大核心
2010年第A01期236-239,共4页
Engineering Mechanics
关键词
风力发电
圆柱绕流
水动力试验
基础桩群
脉动压力
旋涡脱落频率
wind power generation
flow around circular cylinder
hydrodynamic test
pile group foundation
fluctuating pressure
vortex shedding frequency
