【摘要】 为确定在役风电叶片到达设计寿命后能否延寿继续使用，提出一种基于恒幅寿命图模型的延寿区间计算方法。首先，分析叶片在运行工况下的载荷状况，采用应力-寿命（S-N）曲线分析弯矩作用下的疲劳寿命，进而定义弯矩-寿命（M-N）曲线。根据M-N曲线和CLD模型的映射关系建立延寿估计的CLD模型。基于延寿估计的CLD模型计算待退役叶片已累积的疲劳损伤，并从疲劳损伤估计可持续延寿的时间。最后，以某型叶片为例应用该方法进行延寿区间估计。更多还原

【Abstract】 In order to determine whether wind turbine blades should be decommissioned,a calculation method based on the CLD model is proposed to estimate their life extension span. Firstly,the load conditions of blades under operating conditions are analyzed. The fatigue life under bending moment is analyzed using the S-N curve,and then the bending moment life(M-N)curve is defined. The CLD model of life extension estimation is established according to the mapping relationship between M-N curve and CLD model. The CLD model based on life extension estimation calculates the accumulated fatigue damage of the blades to be decommissioned. The sustainable life extension time is estimated based on the accumulated fatigue damage. Finally,the life extension span of a certain type of blade is estimated by using this method.更多还原