考虑风向动态变化下风力机塔架应力特性分析

The wind turbine developed by the research group is taken as the research object and the dynamic change of wind direction is simulated through the dynamic rotating platform. The stress change on top and bottom of tower under the dynamic change of wind direction is studied，and the influence of the dynamic change of wind direction on tower stress is analyzed. It is found that with the increase of the angular velocity of wind direction change，the maximum principal stress value increases firstly and then decreases. When the angular velocity of wind direction change is 0.5（°）/s，the maximum principal stress value has the smallest changes，and when the angular velocity of wind direction change is 1（ °）/s，the tower has the worst stability. With the increase of angle of wind direction change，the maximum principal stress value firstly increases and then decreases，and the minimum principal stress value decreases with the increase of wind direction change angle. When the wind direction change angle is 60°，the maximum principal stress value is the minimum，and the stress fluctuation is obvious when the wind direction change angle is within 30°.