风力机叶片复合材料雷击损伤特性研究

Artificial lightning testing on wind turbine blade: epoxy composite laminate

随着风电产业的快速发展,风机遭受雷击问题愈发突出,近年来国内外对此进行了大量研究.为了研究风机叶片在遭受雷击时材料的损伤机理和规律,采用了目前风机叶片最广泛使用的玻璃纤维增强复合材料(Glass Fiber Reinforced Polymers,GFRP)制成的层合板,在不同电流参数、材料厚度及材料铺层方式的条件下,开展了风机叶片人工雷击损伤试验.通过现场试验及总结分析,发现了纤维损伤面积与电流峰值及电流作用积分呈正相关,与材料厚度呈负相关的规律.同时,在[0°/±45°/0°]、[90°/0°]3层、[0°/90°]3层这3种铺层方式下,铺层方式为[0°/±45°/0°]的复合材料层合板损伤面积最小,显示了其铺层方式的优越性.

With the rapid development of wind power industry, wind turbine lightning problem has become increasingly conspicuous.In recent years, a large number of researches have been made at home and abroad. In order to study the damage mechanism and laws of wind turbine blades, this paper adopts glass fiber reinforced polymers(GFRP), which have been widely used in wind turbine blades, to carry out the lightning damage test, under different current parameters, material thickness and laying methods. Through the field test and analysis, it is found that the area of fiber damage is positively correlated with the current peak as well as current action integral, and is negatively correlated with the thickness of the material. Meanwhile, the damage area of composite laminates, with the laying method of [0 °/±45 °/0 °], is the smallest among [90°/0°]3、[0°/90°]3、[0°/±45°/0°], showing its superiority.