
风机基础损伤主要源于风轮叶片所承受的动态载荷,而叶片载荷的激励源为风荷载,湍流度是表征风况特征的关键参数。为探究湍流度与风机基础损伤的关联,以2 MW基础环式风电机组为研究对象,利用GH Bladed和ABAQUS软件进行仿真模拟,分析在不同风速及湍流度组合下风机基础载荷-应力响应,进而分析湍流度对基础环式风机基础疲劳损伤的影响。结果表明:随着湍流度增大,基础载荷与应力的幅值上升、均值下降;背风侧基础混凝土疲劳损伤最严重,随湍流度增大而加剧并向两侧递减;当湍流度低于0.35时,基础混凝土在20 a内可保持完好,超过该界限则会导致疲劳损伤急剧增加,进而引发结构破坏。
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