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A Model for Wind Turbine Blade with Enhanced Torsional Stability

机译:具有增强的扭转稳定性的风力涡轮机叶片模型

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A mathematical model for enhancing the torsional stability of a slender, tapered, composite wind turbine blade is presented. The increase of the stability boundary is measured by maximization of the critical wind speed at which failure may occur by aeroelastic divergence in parked-turbine state. The total structural mass of the blade is kept constant in order not to violate other economic and performance requirements. Exact analytical method is developed for blades made of cross-ply lay-up carbon/epoxy composites. The blade structural model is represented by uniform panels, each of which has different length, wall thickness, and volume fractions of the constituent materials of construction. Useful design charts for good blade configurations are given for cases of two and three panels. Results demonstrate the effects of blade taper, wall thickness and fiber volume fraction on the functional behavior of the critical wind speed.
机译:提出了一种用于增强细长的锥形复合风力涡轮机叶片扭转稳定性的数学模型。稳定边界的增加是通过临界风速的最大化来衡量的,在临界风速下,停放涡轮状态下的气动弹性发散可能会导致故障。叶片的总结构质量保持恒定,以便不违反其他经济和性能要求。针对由交叉铺层的碳/环氧树脂复合材料制成的叶片开发了精确的分析方法。叶片结构模型由统一的面板表示,每个面板的长度,壁厚和构成材料的体积分数均不同。对于两个和三个面板的情况,给出了用于良好刀片配置的有用设计图。结果证明了叶片锥度,壁厚和纤维体积分数对临界风速功能行为的影响。

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