Abstract
The present research envisages a method for calculating the dynamic responses of the wind turbines under typhoon. The measured power spectrum and inverse Fourier transform are used to generate the fluctuating wind field in the eyewall of the typhoon. Based on the beam theory, the unsteady aerodynamic model and the wind turbine dynamic model are coupled to calculate the dynamic response. Furthermore, using this method, the aeroelastic responses of a 6 MW wind turbine at different yaw angles are studied, and a 2 MW wind turbine are also calculated to verify the applicability of the results for different sizes of wind turbines. The results show that the turbulence characteristics of the fluctuating wind simulated by the proposed method is in good agreement with the actual measurement. Compared with the results simulated by the recommended power spectrum like the Kaimal spectrum, the energy distribution and variation characteristics simulated by the proposed method represent the real typhoon in a superior manner. It is found that the blade vibrates most violently at the inflow yaw angle of 30 degrees under the coupled effect of the aerodynamic, inertial and structural loads. In addition, the load on the tower exceeds the design limit values at the yaw angles of both 30 degrees and 120 degrees.
Highlights
Typhoons are a kind of extreme weather with a large-scale vorticity system
Once based on experiments, which showed the existence yaw angle the vibration wind turbine exhibited a significant yaw inthat extreme weather, of it would lead increased to an increase in the tower stress with a risk of being damaged
Turbine modeled, by thethe aerodynamic loads and aeroelastic are calculated by theThe blade aeroelastic responses and ultimate loads of the wind turbine at different inflow angles of the element momentum and multibody dynamics
Summary
Typhoons are a kind of extreme weather with a large-scale vorticity system. Based on the structural characteristics of typhoon, it is usually divided into three parts: wind eye region, eye wall region and outer gale region. Once based on experiments, which showed the existence yaw angle the vibration wind turbine exhibited a significant yaw inthat extreme weather, of it would lead increased to an increase in the tower stress with a risk of being damaged. In view of the shortcomings of the current research, this paper combines the measured data of typhoon eye wall region with the power spectrum method to simulate the fluctuating wind withoftyphoon characteristics, combines them with thecombines aerodynamic and dynamic. In view the shortcomings of theand current research, this paper the measured data of models of the wind turbines to study the aeroelastic response characteristics of wind typhoon eye wall region with the power spectrum method to simulate the fluctuatingturbines wind with with different yaw angles. Typhoon characteristics, and combines them with the aerodynamic and dynamic models of the wind turbines to study the aeroelastic response characteristics of wind turbines with different yaw angles
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