Abstract
Abstract The interaction between water and structure will inevitably lead to the hydrodynamic pressure, which could change the dynamic behavior of the wind turbine tower under earthquake action. Based on the Morison hydrodynamic theory, a simplified calculation method of hydrodynamic pressure was proposed, and the effects of different water depths and hydrodynamic pressure on the seismic behavior of the wind turbine tower is investigated. The main results include: wind turbine tower in deep water is sensitive to water, and the deformation and energy dissipation capacity of the wind turbine tower are decreased affected by the hydrodynamic pressure; the influence of hydrodynamic pressure on the acceleration and displacement is related to the high frequency components of the seismic wave, and the effect of hydrodynamic pressure on the internal force, displacement, and acceleration increases with the increasing of the water depths under different earthquakes. Finally, a shaking table test is carried out, and the experimental results are in good agreement with the calculated results using our proposed method.
Highlights
Because offshore wind energy resources are rich, all coastal states will take ocean development as a national strategy
A simplified calculation method of hydrodynamic pressure was proposed which adapted to time-history response analysis on wind turbine tower based on the Morison hydrodynamic theory, and the effect of hydrodynamic pressure on seismic behavior of the wind turbine tower is investigated
According to Morison's hydrodynamic theory (Morison et al 1950), the influence of structure on water movement was ignored, and it is assumed that the action of water on the structure is caused by undisturbed acceleration and velocity fields; the hydrodynamic pressure on structure is composed of two parts: the inertial force and the resistance, and the calculation formula is shown in Equation (1)
Summary
Because offshore wind energy resources are rich, all coastal states will take ocean development as a national strategy. There are few researches on the seismic response of deep-water wind turbine tower considering hydrodynamic pressure, and there is no systematic and effective calculation method at home and abroad. The influence of hydrodynamic pressure on the structure has been studied at home and abroad, the analytical solution in previous studies are usually applicable to the calculation of hydrodynamic pressure on a more regular structure, and is not suitable for the seismic design of deep-water wind turbine tower with variable cross-section. A simplified calculation method of hydrodynamic pressure was proposed which adapted to time-history response analysis on wind turbine tower based on the Morison hydrodynamic theory, and the effect of hydrodynamic pressure on seismic behavior of the wind turbine tower is investigated. The shaking table test is carried out to verify the accuracy of the calculation results in our study
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
