Structural response analysis of large MW wind turbine under the combined action of operating load and seismic excitation
The wind turbines are subjected to continuous wind loads during their whole service life and are inevitably resisted earthquake action.In this paper,a large megawatt wind turbine is taken as the research object to simulate and analyze its deformation and mechanical responses under the conditions of normal operation,earthquake during shutdown and earthquake during operation.The results show that the deformation of wind turbine increases with the increase of tower height,and the horizontal displacement of the wind turbine under the earthquake is obviously less than that under the wind turbine operation state.With the increase of earthquake level,the horizontal displacement of the wind turbine is gradually increased.The deformation shape of the wind turbine remains unchanged,and the deformation of tower top is large.The influence of the wind turbine operating load on structural deformation response is significantly greater than that of small and medium earthquake actions.Meanwhile,the deformation response of the wind turbine under the combined action of operating load and earthquake is significantly greater than that under the separate action of two loads.In the structural design of the wind turbine,it is necessary to consider the coupling effect of the operating state and the earthquake.The stress response at the top of the tower is the largest,and its cross-section should be checked in the design.
国家科技期刊平台
NSTL
万方数据
维普
