为研究百米级风电叶片在组合极限载荷下的损伤响应,对时代新材TMT90 m+叶片进行全尺寸极限承载力测试。通过试验监测、应变数据分析以及非线性有限元仿真对叶片的失效机理进行研究。结果表明结构非线性、材料非线性导致叶片局部区域在承载高水平载荷时出现应力集中,进而促使局部屈曲的产生,个别区域的提前失效加速了局部屈曲对局部刚度及稳定性的削弱,从而导致叶片最终的断裂失效。
Abstract
To study the damage response of 100-meter-class wind turbine blades under combined ultimate loads, this paper conducted a full-size ultimate load capacity test on the TMT90m+ blade of Zhu Zhou Times New Material Technology Co., Ltd. The failure mechanism of the blade is investigated through test monitoring, strain data analysis, and nonlinear finite element simulation. The results show that structural nonlinearity and material nonlinearity lead to stress concentration in the local area of the blade when carrying high-level loads, which in turn promotes the occureence of local buckling. The early failure of the individual regions accelerates the weakening of local stiffness and stability by local buckling, thus leading to the final fracture failure of the blade.
关键词
风电叶片 /
复合材料 /
有限元分析 /
全尺寸试验 /
局部屈曲
Key words
wind turbine blades /
composite material /
finite element analysis /
full-scale test /
local buckling
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基金
国家重点研发计划（2022YFB3704504）
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