Seismic behavior analysis of wind turbine tower affected by hydrodynamic pressure based on a simplified calculation model

摘要

The interaction between water and structure will inevitably lead to the hydrodynamic pressure, which couldchange the dynamic behavior of the wind turbine tower under earthquake action. Based on the Morisonhydrodynamic theory, a simplified calculation method of hydrodynamic pressure was proposed, and theeffects of different water depths and hydrodynamic pressure on the seismic behavior of the wind turbinetower is investigated. The main results include: wind turbine tower in deep water is sensitive to water, andthe deformation and energy dissipation capacity of the wind turbine tower are decreased affected by thehydrodynamic pressure; the influence of hydrodynamic pressure on the acceleration and displacement isrelated to the high frequency components of the seismic wave, and the effect of hydrodynamic pressure onthe internal force, displacement, and acceleration increases with the increasing of the water depths underdifferent earthquakes. Finally, a shaking table test is carried out, and the experimental results are in goodagreement with the calculated results using our proposed method.