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针对所提出的新型多立柱张力腿式浮动风力机在正常工作工况下的运行,进行了时域耦合动力响应仿真分析和极限载荷预报.选取了在此工况下可能出现极值的叶片根部弯矩(面内弯矩和面外弯矩)作为研究对象,依据IEC61400-1和IEC61400-3标准要求,运用极限载荷统计外推法得到了不同重现期内的极限载荷.采用将分块最大值法和过阈最大值法相结合的方法来提取局部最大载荷.选用三参数威布尔分布作为局部最大载荷概率分布函数,并使用最小二乘法对其进行参数估计,验证了在不同风速下所拟合的极限载荷短期分布的收敛性.
Aiming at the operation of the proposed new multi-leg tension legged floating wind turbine under normal operating conditions, the time-domain coupled dynamic response simulation analysis and the ultimate load forecasting are carried out.Selecting the root of the blade which may have extreme value in this condition, Bending moment (in-plane bending moment and out-of-plane bending moment) as the research object, according to the requirements of IEC61400-1 and IEC61400-3 standards, the limit load statistic extrapolation method was used to obtain the ultimate load in different recurrence periods. Maximum value method and threshold maximum value method to extract the local maximum load.The three-parameter Weibull distribution is selected as the local maximum load probability distribution function, and the least squares method is used to estimate the parameters, which verifies that under different wind speeds Convergence of Short Term Distribution of Fitting Ultimate Load.