基于频域分析垂直轴风力发电机组旋转主轴的风致动力疲劳

Wind-induced fatigue analysis of main-shaft in a vertical-axis wind turbine

使用ANSYS有限元软件研究在风荷载作用下垂直轴风力发电机组(Vertical-axis wind turbine,VAWT)主轴在旋转状态下的风致动力疲劳问题。首先,在频域内,研究在脉动风作用下机组旋转主轴(转速为15.5m/s)三个关键位置处的风动力响应特性。然后,基于机组旋转主轴风动力响应的计算与分析,对机组旋转主轴进行风致动力疲劳分析,计算其疲劳寿命耗用系数,以评价该机组旋转主轴的工作状况。

The wind-induced dynamic fatigue of the main-shaft in a vertical-axis wind turbine(VAWT)under rotation was studied with ANSYS code.Firstly,the dynamic responses for three critical positions of the main-shaft in the verti-cal-axis wind turbine were analyzed taking rotation and wind 1oads into consideration.Based on the investigation of the dy-namic responses,the wind-induced dynamic fatigue of the main-shaft was then studied,so as to determine the fatigue life usage coefficient and evaluatethe working requirements of the main-shaft inthe VAWT.