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Typhoon-induced response characteristics and yaw effects of large wind turbine based on multi-body dynamics method |
BAO Wenyi, WANG Hao, KE Shitang |
Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract For the study of the effects of aerodynamic load distribution and dynamic response of the large wind turbine caused by violent typhoon under different yaws. This paper investigates the 5mw wind turbine of NREL, based on the multi-body dynamics and mixed multibody system modeling method, established the rigid-flexible multibody dynamics model, using the ADAMS/Vibration to analyze the dynamic characteristics and the validation. of the model. At the same time, the three-dimensional stochastic wind field in the typhoon eyewall at the strongly interferential stage is simulated based on the spectral decomposition, and the aerodynamic load of the turbine are simulated numerically based on the yin-momentum theory in 7 working environment where the angle of yaws is different. And the influence of yaws on the aerodynamic load of the whole wind turbine is analyzed. Finally, the time history analysis of turbine with different angle of yaws is performed based on the multi-body dynamics model and the effecting law of wind-induced response with different angle of yaws is extracted. The results show that: The supercell method can accurately describe the dynamic characteristics of the wind turbine with less freedom. The results show that the typhoon-induced wind load and wind-vibration response of the structure increase significantly at the yaw angle of 30° and 120°, which is a typical unfavorable condition and should be avoided. The main conclusions can provide a scientific basis for the wind-resistant design of large wind turbines under extreme conditions.
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Received: 14 January 2019
Published: 28 July 2020
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