以课题组自行研制的风力机为研究对象,通过动态旋转平台模拟风向动态变化,研究在风向动态变化情况下塔顶和塔底的应力变化情况,同时分析风向动态变化对塔架应力的影响。对比发现：随着风向变化角速度的增大,最大主应力值呈先增大后减小的趋势,风向变化角速度为0.5（ °）/s时最大主应力值变化程度最小,风向变化角速度为1（ °）/s时,塔架稳定性最不利。随着风向变化角度的增大,最大主应力值先增大后减小,且最小主应力值随风向变化角度的增大而减小,风向变化角度为60°时最大主应力值最小,风向变化角度在30°以内应力波动较明显。
Abstract
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°.
关键词
风力机 /
塔架 /
应力 /
风向变化角度 /
风向变化角速度
Key words
wind turbines /
tower /
stress /
angle of wind direction change /
angular velocity of wind direction change
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基金
国家自然科学基金（51766014）; 内蒙古自治区重点基础研究开放课题
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